The diverse nature of optical emission lines in brightest cluster galaxies: IFU observations of the central kiloparsec

L.O.V. Edwards; C. Robert; M. Mollá; S.L. McGee

doi:10.1111/j.1365-2966.2009.14897.x

The diverse nature of optical emission lines in brightest cluster galaxies: IFU observations of the central kiloparsec

L.O.V. Edwards, C. Robert, M. Mollá, S.L. McGee

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

We present integral field spectroscopy of the nebular line emission in a sample of nine brightest cluster galaxies (BCGs). The sample was chosen to probe both cooling flow and non-cooling flow clusters, as well as a range of cluster X-ray luminosities. The line emission morphology and velocity gradients suggest a great diversity in the properties of the line emitting gas. While some BCGs show evidence for filamentary or patchy emission (Abell 1060, Abell 1668 and MKW 3s), others have extended emission (Abell 1204, Abell 2199), while still others have centrally concentrated emission (Abell 2052). We examine diagnostic line ratios to determine the dominant ionization mechanisms in each galaxy. Most of the galaxies show regions with active galactic nucleus like spectra, however, for two BCGs, Abell 1060 and Abell 1204, the emission line diagnostics suggest regions which can be described by the emission from young stellar populations. The diversity of emission-line properties in our sample of BCGs suggests that the emission mechanism is not universal, with different ionization processes dominating different systems. Given this diversity, there is no evidence for a clear distinction of the emission-line properties between cooling flow and non-cooling flow BCGs. It is not always cooling flow BCGs which show emission (or young stellar populations), and non-cooling flow BCGs which do not. © 2009 RAS.

Original language	English
Pages (from-to)	1953-1971
Number of pages	19
Journal	Royal Astronomical Society. Monthly Notices
Volume	396
Issue number	4
DOIs	https://doi.org/10.1111/j.1365-2966.2009.14897.x
Publication status	Published - 2009

Bibliographical note

Export Date: 15 August 2017

CODEN: MNRAA

Correspondence Address: Edwards, L. O. V.; Département de Physique, Génie Physique et Optique, Université Laval, Centre de Recherche en Astrophysique du Québec, Québec, QC G1K 7P4, Canada; email: louise@ipac.caltech.edu

References: Baldwin, J.A., Phillips, M.M., Terlevich, R., (1981) PASP, 93, p. 5. , BPT); Bauer, F.E., Fabian, A.C., Sanders, J.S., Allen, S.W., Johnstone, R.M., (2005) MNRAS, 359, p. 1481; Best, P.N., Kauffmann, G., Heckman, T.M., Brinchmann, J., Charlot, S., Ivezić, Ž., White, S.D.M., (2005) MNRAS, 362, p. 25; Bildfell, C., Hoekstra, H., Babul, A., Mahdavi, A., (2008) MNRAS, 389, p. 1637; Binette, L., Raga, A.C., Calvet, N., Canto, J., (1990) PASP, 102, p. 723; Bîrzan, L., Rafferty, D.A., McNamara, B.R., Wise, M.W., Nulsen, P.E.J., (2004) ApJ, 607, p. 800; Blanton, E.L., Sarazin, C.L., McNamara, B.R., Wise, M.W., (2001) ApJ, 558, p. 15; Blanton, E.L., Sarazin, C.L., McNamara, B.R., (2003) ApJ, 585, p. 227; Böhringer, H., (2001) A&A, 369, p. 826; Böhringer, H., Matsushita, K., Churazov, E., Ikebe, Y., Chen, Y., (2002) A&A, 382, p. 804; Conselice, C.J., Gallagher III, J.S., Wyse, R.F.G., (2001) AJ, 122, p. 2281; Conselice, C.J., Gallagher III, J.S., Wyse, R.F.G., (2002) AJ, 123, p. 2246; Cowie, L.L., Hu, E.M., Jenkins, E.B., York, D.G., (1983) ApJ, 272, p. 29; Crawford, C.S., Allen, S.W., Ebeling, H., Edge, A.C., Fabian, A.C., (1999) MNRAS, 306, p. 857; Crawford, C.S., Hatch, N.A., Fabian, A.C., Sanders, J.S., (2005) MNRAS, 363, p. 216; Croton, D.J., (2006) MNRAS, 365, p. 11; De Vaucouleurs, G., De Vaucouleurs, A., Corwin Jr., H.G., Buta, R.J., Paturel, G., Fouqué, P., (1991) Third Reference Catalogue of Bright Galaxies, 13. , Springer. New York; Donahue, M., MacK, J., Voit, G.M., Sparks, W., Elston, R., Maloney, P.R., (2000) ApJ, 545, p. 670; Donahue, M., Sun, M., O'Dea, C.P., Voit, G.M., Cavagnolo, K.W., (2007) AJ, 134, p. 14; Ebeling, H., Voges, W., Bohringer, H., Edge, A.C., Huchra, J.P., Briel, U.G., (1996) MNRAS, 281, p. 799; Ebeling, H., Edge, A.C., Bohringer, H., Allen, S.W., Crawford, C.S., Fabian, A.C., Voges, W., Huchra, J.P., (1998) MNRAS, 301, p. 881; Edge, A.C., Wilman, R.J., Johnstone, R.M., Crawford, C.S., Fabian, A.C., Allen, S.W., (2002) MNRAS, 337, p. 49; Edwards, L.O.V., (2007), PhD thesis. Univ. Laval; Edwards, L.O.V., Hudson, M.J., Balogh, M.L., Smith, R.J., (2007) MNRAS, 379, p. 100; Fabian, A.C., (1994) ARA&A, 32, p. 277; Fabian, A.C., Sanders, J.S., Ettori, S., Taylor, G.B., Allen, S.W., Crawford, C.S., Iwasawa, K., Johnstone, R.M., (2001) MNRAS, 321, p. 33; Fabian, A.C., Johnstone, R.M., Sanders, J.S., Conselice, C.J., Crawford, C.S., Gallagher III, J.S., Zweibel, E., (2008) Nat, 454, p. 968; Ferland, G.J., Fabian, A.C., Hatch, N.A., Johnstone, R.M., Porter, R.L., Van Hoof, P.A.M., Williams, R.J.R., (2008) MNRAS, 386, p. 72; Fujita, Y., (2008) PASJ, 60, p. 1133; Gaskell, C.M., Ferland, G.J., (1984) PASP, 96, p. 393; Hatch, N.A., Crawford, C.S., Fabian, A.C., (2007) MNRAS, 380, p. 33; Hayakawa, A., Hoshino, A., Ishida, M., Furusho, T., Yamasaki, N.Y., Ohashi, T., (2006) PASJ, 58, p. 695; Hicks, A.K., Mushotzky, R., (2005) ApJ, 635, p. 9; Jackson, N., Tadhunter, C., Sparks, W.B., (1998) MNRAS, 301, p. 131; Johnstone, R.M., Allen, S.W., Fabian, A.C., Sanders, J.S., (2002) MNRAS, 336, p. 299; Kaastra, J.S., (2004) A&A, 413, p. 415; Kauffmann, G., (2003) MNRAS, 346, p. 1055; Kennicutt Jr., R.C., (1998) ARA&A, 36, p. 189; Kewley, L.J., Dopita, M.A., (2002) ApJS, 142, p. 35; Lahav, O., Fabian, A.C., Edge, A.C., Putney, A., (1989) MNRAS, 238, p. 881; Laine, S., Van Der Marel, R.P., Lauer, T.R., Postman, M., O'Dea, C.P., Owen, F.N., (2003) AJ, 125, p. 478; Leitherer, C., (1999) ApJS, 123, p. 3; McNamara, B.R., Nulsen, P.E.J., (2007) ARA&A, 45, p. 117; McNamara, B.R., O'Connell, R.W., (1989) AJ, 98, p. 2018; McNamara, B.R., Wise, M., Sarazin, C.L., Jannuzi, B.T., Elston, R., (1996) ApJ, 466, p. 9; Mollá, M., García-Vargas, M.L., (2000) A&A, 359, p. 18; O'Dea, C.P., (2008) ApJ, 681, p. 1035; Oegerle, W.R., Cowie, L., Davidsen, A., Hu, E., Hutchings, J., Murphy, E., Sembach, K., Woodgate, B., (2001) ApJ, 560, p. 187; Osterbrock, D.E., Ferland, G.J., (2006) Astrophysics of Gaseous Nebulae and Active Galactic Nuclei, 2nd Edn., , University Science Books. Sausalito, CA; Ostriker, J.P., Hausman, M.A., (1977) ApJ, 217, p. 125; Peterson, J.R., Kahn, S.M., Paerels, F.B.S., Kaastra, J.S., Tamura, T., Bleeker, J.A.M., Ferrigno, C., Jernigan, J.G., (2003) ApJ, 590, p. 207; Pizzolato, F., Soker, N., (2005) ApJ, 632, p. 821; Quillen, A.C., (2008) ApJS, 176, p. 39; Reynolds, C.S., Fabian, A.C., (1996) MNRAS, 278, p. 479; Sadler, E.M., Gerhard, O.E., (1985) MNRAS, 214, p. 177; Salomé, P., Combes, F., (2003) A&A, 412, p. 657; Salomé, P., (2006) A&A, 454, p. 437; Schlegel, D.J., Finkbeiner, D.P., Davis, M., (1998) ApJ, 500, p. 525; Tadhunter, C.N., Metz, S., Robinson, A., (1994) MNRAS, 268, p. 989; Tadhunter, C., Marconi, A., Axon, D., Wills, K., Robinson, T.G., Jackson, N., (2003) MNRAS, 342, p. 861; Tremonti, C.A., Heckman, T.M., Kauffmann, G.E., (2004) ApJ, 613, p. 898; Vasterberg, A.R., Lindblad, P.O., Jorsater, S., (1991) A&A, 247, p. 335; Von Der Linden, A., Best, P.N., Kauffmann, G., White, S.D.M., (2007) MNRAS, 379, p. 867; White, D.A., (2000) MNRAS, 312, p. 663; Wilman, R.J., Edge, A.C., Johnstone, R.M., Fabian, A.C., Allen, S.W., Crawford, C.S., (2002) MNRAS, 337, p. 63; Wilman, R.J., Edge, A.C., Swinbank, A.M., (2006) MNRAS, 371, p. 93; Yamasaki, N.Y., Ohashi, T., Furusho, T., (2002) ApJ, 578, p. 833

Keywords

Cooling flows
Galaxies: clusters: general
Galaxies: clusters: individual: A1060
Galaxies: evolution
Galaxies: stellar content
Stars: formation

Access to Document

10.1111/j.1365-2966.2009.14897.x

https://www.scopus.com/inward/record.uri?eid=2-s2.0-67649869512&doi=10.1111%2fj.1365-2966.2009.14897.x&partnerID=40&md5=25aab4f461590a289381743876dc6370

Cite this

@article{d13024519ed546d19bfed30f0bc3487e,

title = "The diverse nature of optical emission lines in brightest cluster galaxies: IFU observations of the central kiloparsec",

abstract = "We present integral field spectroscopy of the nebular line emission in a sample of nine brightest cluster galaxies (BCGs). The sample was chosen to probe both cooling flow and non-cooling flow clusters, as well as a range of cluster X-ray luminosities. The line emission morphology and velocity gradients suggest a great diversity in the properties of the line emitting gas. While some BCGs show evidence for filamentary or patchy emission (Abell 1060, Abell 1668 and MKW 3s), others have extended emission (Abell 1204, Abell 2199), while still others have centrally concentrated emission (Abell 2052). We examine diagnostic line ratios to determine the dominant ionization mechanisms in each galaxy. Most of the galaxies show regions with active galactic nucleus like spectra, however, for two BCGs, Abell 1060 and Abell 1204, the emission line diagnostics suggest regions which can be described by the emission from young stellar populations. The diversity of emission-line properties in our sample of BCGs suggests that the emission mechanism is not universal, with different ionization processes dominating different systems. Given this diversity, there is no evidence for a clear distinction of the emission-line properties between cooling flow and non-cooling flow BCGs. It is not always cooling flow BCGs which show emission (or young stellar populations), and non-cooling flow BCGs which do not. {\textcopyright} 2009 RAS.",

keywords = "Cooling flows, Galaxies: clusters: general, Galaxies: clusters: individual: A1060, Galaxies: evolution, Galaxies: stellar content, Stars: formation",

author = "L.O.V. Edwards and C. Robert and M. Moll{\'a} and S.L. McGee",

note = "Export Date: 15 August 2017 CODEN: MNRAA Correspondence Address: Edwards, L. O. V.; D{\'e}partement de Physique, G{\'e}nie Physique et Optique, Universit{\'e} Laval, Centre de Recherche en Astrophysique du Qu{\'e}bec, Qu{\'e}bec, QC G1K 7P4, Canada; email: louise@ipac.caltech.edu References: Baldwin, J.A., Phillips, M.M., Terlevich, R., (1981) PASP, 93, p. 5. , BPT); Bauer, F.E., Fabian, A.C., Sanders, J.S., Allen, S.W., Johnstone, R.M., (2005) MNRAS, 359, p. 1481; Best, P.N., Kauffmann, G., Heckman, T.M., Brinchmann, J., Charlot, S., Ivezi{\'c}, {\v Z}., White, S.D.M., (2005) MNRAS, 362, p. 25; Bildfell, C., Hoekstra, H., Babul, A., Mahdavi, A., (2008) MNRAS, 389, p. 1637; Binette, L., Raga, A.C., Calvet, N., Canto, J., (1990) PASP, 102, p. 723; B{\^i}rzan, L., Rafferty, D.A., McNamara, B.R., Wise, M.W., Nulsen, P.E.J., (2004) ApJ, 607, p. 800; Blanton, E.L., Sarazin, C.L., McNamara, B.R., Wise, M.W., (2001) ApJ, 558, p. 15; Blanton, E.L., Sarazin, C.L., McNamara, B.R., (2003) ApJ, 585, p. 227; B{\"o}hringer, H., (2001) A&A, 369, p. 826; B{\"o}hringer, H., Matsushita, K., Churazov, E., Ikebe, Y., Chen, Y., (2002) A&A, 382, p. 804; Conselice, C.J., Gallagher III, J.S., Wyse, R.F.G., (2001) AJ, 122, p. 2281; Conselice, C.J., Gallagher III, J.S., Wyse, R.F.G., (2002) AJ, 123, p. 2246; Cowie, L.L., Hu, E.M., Jenkins, E.B., York, D.G., (1983) ApJ, 272, p. 29; Crawford, C.S., Allen, S.W., Ebeling, H., Edge, A.C., Fabian, A.C., (1999) MNRAS, 306, p. 857; Crawford, C.S., Hatch, N.A., Fabian, A.C., Sanders, J.S., (2005) MNRAS, 363, p. 216; Croton, D.J., (2006) MNRAS, 365, p. 11; De Vaucouleurs, G., De Vaucouleurs, A., Corwin Jr., H.G., Buta, R.J., Paturel, G., Fouqu{\'e}, P., (1991) Third Reference Catalogue of Bright Galaxies, 13. , Springer. New York; Donahue, M., MacK, J., Voit, G.M., Sparks, W., Elston, R., Maloney, P.R., (2000) ApJ, 545, p. 670; Donahue, M., Sun, M., O'Dea, C.P., Voit, G.M., Cavagnolo, K.W., (2007) AJ, 134, p. 14; Ebeling, H., Voges, W., Bohringer, H., Edge, A.C., Huchra, J.P., Briel, U.G., (1996) MNRAS, 281, p. 799; Ebeling, H., Edge, A.C., Bohringer, H., Allen, S.W., Crawford, C.S., Fabian, A.C., Voges, W., Huchra, J.P., (1998) MNRAS, 301, p. 881; Edge, A.C., Wilman, R.J., Johnstone, R.M., Crawford, C.S., Fabian, A.C., Allen, S.W., (2002) MNRAS, 337, p. 49; Edwards, L.O.V., (2007), PhD thesis. Univ. Laval; Edwards, L.O.V., Hudson, M.J., Balogh, M.L., Smith, R.J., (2007) MNRAS, 379, p. 100; Fabian, A.C., (1994) ARA&A, 32, p. 277; Fabian, A.C., Sanders, J.S., Ettori, S., Taylor, G.B., Allen, S.W., Crawford, C.S., Iwasawa, K., Johnstone, R.M., (2001) MNRAS, 321, p. 33; Fabian, A.C., Johnstone, R.M., Sanders, J.S., Conselice, C.J., Crawford, C.S., Gallagher III, J.S., Zweibel, E., (2008) Nat, 454, p. 968; Ferland, G.J., Fabian, A.C., Hatch, N.A., Johnstone, R.M., Porter, R.L., Van Hoof, P.A.M., Williams, R.J.R., (2008) MNRAS, 386, p. 72; Fujita, Y., (2008) PASJ, 60, p. 1133; Gaskell, C.M., Ferland, G.J., (1984) PASP, 96, p. 393; Hatch, N.A., Crawford, C.S., Fabian, A.C., (2007) MNRAS, 380, p. 33; Hayakawa, A., Hoshino, A., Ishida, M., Furusho, T., Yamasaki, N.Y., Ohashi, T., (2006) PASJ, 58, p. 695; Hicks, A.K., Mushotzky, R., (2005) ApJ, 635, p. 9; Jackson, N., Tadhunter, C., Sparks, W.B., (1998) MNRAS, 301, p. 131; Johnstone, R.M., Allen, S.W., Fabian, A.C., Sanders, J.S., (2002) MNRAS, 336, p. 299; Kaastra, J.S., (2004) A&A, 413, p. 415; Kauffmann, G., (2003) MNRAS, 346, p. 1055; Kennicutt Jr., R.C., (1998) ARA&A, 36, p. 189; Kewley, L.J., Dopita, M.A., (2002) ApJS, 142, p. 35; Lahav, O., Fabian, A.C., Edge, A.C., Putney, A., (1989) MNRAS, 238, p. 881; Laine, S., Van Der Marel, R.P., Lauer, T.R., Postman, M., O'Dea, C.P., Owen, F.N., (2003) AJ, 125, p. 478; Leitherer, C., (1999) ApJS, 123, p. 3; McNamara, B.R., Nulsen, P.E.J., (2007) ARA&A, 45, p. 117; McNamara, B.R., O'Connell, R.W., (1989) AJ, 98, p. 2018; McNamara, B.R., Wise, M., Sarazin, C.L., Jannuzi, B.T., Elston, R., (1996) ApJ, 466, p. 9; Moll{\'a}, M., Garc{\'i}a-Vargas, M.L., (2000) A&A, 359, p. 18; O'Dea, C.P., (2008) ApJ, 681, p. 1035; Oegerle, W.R., Cowie, L., Davidsen, A., Hu, E., Hutchings, J., Murphy, E., Sembach, K., Woodgate, B., (2001) ApJ, 560, p. 187; Osterbrock, D.E., Ferland, G.J., (2006) Astrophysics of Gaseous Nebulae and Active Galactic Nuclei, 2nd Edn., , University Science Books. Sausalito, CA; Ostriker, J.P., Hausman, M.A., (1977) ApJ, 217, p. 125; Peterson, J.R., Kahn, S.M., Paerels, F.B.S., Kaastra, J.S., Tamura, T., Bleeker, J.A.M., Ferrigno, C., Jernigan, J.G., (2003) ApJ, 590, p. 207; Pizzolato, F., Soker, N., (2005) ApJ, 632, p. 821; Quillen, A.C., (2008) ApJS, 176, p. 39; Reynolds, C.S., Fabian, A.C., (1996) MNRAS, 278, p. 479; Sadler, E.M., Gerhard, O.E., (1985) MNRAS, 214, p. 177; Salom{\'e}, P., Combes, F., (2003) A&A, 412, p. 657; Salom{\'e}, P., (2006) A&A, 454, p. 437; Schlegel, D.J., Finkbeiner, D.P., Davis, M., (1998) ApJ, 500, p. 525; Tadhunter, C.N., Metz, S., Robinson, A., (1994) MNRAS, 268, p. 989; Tadhunter, C., Marconi, A., Axon, D., Wills, K., Robinson, T.G., Jackson, N., (2003) MNRAS, 342, p. 861; Tremonti, C.A., Heckman, T.M., Kauffmann, G.E., (2004) ApJ, 613, p. 898; Vasterberg, A.R., Lindblad, P.O., Jorsater, S., (1991) A&A, 247, p. 335; Von Der Linden, A., Best, P.N., Kauffmann, G., White, S.D.M., (2007) MNRAS, 379, p. 867; White, D.A., (2000) MNRAS, 312, p. 663; Wilman, R.J., Edge, A.C., Johnstone, R.M., Fabian, A.C., Allen, S.W., Crawford, C.S., (2002) MNRAS, 337, p. 63; Wilman, R.J., Edge, A.C., Swinbank, A.M., (2006) MNRAS, 371, p. 93; Yamasaki, N.Y., Ohashi, T., Furusho, T., (2002) ApJ, 578, p. 833",

year = "2009",

doi = "10.1111/j.1365-2966.2009.14897.x",

language = "English",

volume = "396",

pages = "1953--1971",

journal = "Royal Astronomical Society. Monthly Notices",

issn = "0035-8711",

publisher = "SIPRI/Oxford University Press",

number = "4",

}

TY - JOUR

T1 - The diverse nature of optical emission lines in brightest cluster galaxies: IFU observations of the central kiloparsec

AU - Edwards, L.O.V.

AU - Robert, C.

AU - Mollá, M.

AU - McGee, S.L.

N1 - Export Date: 15 August 2017 CODEN: MNRAA Correspondence Address: Edwards, L. O. V.; Département de Physique, Génie Physique et Optique, Université Laval, Centre de Recherche en Astrophysique du Québec, Québec, QC G1K 7P4, Canada; email: louise@ipac.caltech.edu References: Baldwin, J.A., Phillips, M.M., Terlevich, R., (1981) PASP, 93, p. 5. , BPT); Bauer, F.E., Fabian, A.C., Sanders, J.S., Allen, S.W., Johnstone, R.M., (2005) MNRAS, 359, p. 1481; Best, P.N., Kauffmann, G., Heckman, T.M., Brinchmann, J., Charlot, S., Ivezić, Ž., White, S.D.M., (2005) MNRAS, 362, p. 25; Bildfell, C., Hoekstra, H., Babul, A., Mahdavi, A., (2008) MNRAS, 389, p. 1637; Binette, L., Raga, A.C., Calvet, N., Canto, J., (1990) PASP, 102, p. 723; Bîrzan, L., Rafferty, D.A., McNamara, B.R., Wise, M.W., Nulsen, P.E.J., (2004) ApJ, 607, p. 800; Blanton, E.L., Sarazin, C.L., McNamara, B.R., Wise, M.W., (2001) ApJ, 558, p. 15; Blanton, E.L., Sarazin, C.L., McNamara, B.R., (2003) ApJ, 585, p. 227; Böhringer, H., (2001) A&A, 369, p. 826; Böhringer, H., Matsushita, K., Churazov, E., Ikebe, Y., Chen, Y., (2002) A&A, 382, p. 804; Conselice, C.J., Gallagher III, J.S., Wyse, R.F.G., (2001) AJ, 122, p. 2281; Conselice, C.J., Gallagher III, J.S., Wyse, R.F.G., (2002) AJ, 123, p. 2246; Cowie, L.L., Hu, E.M., Jenkins, E.B., York, D.G., (1983) ApJ, 272, p. 29; Crawford, C.S., Allen, S.W., Ebeling, H., Edge, A.C., Fabian, A.C., (1999) MNRAS, 306, p. 857; Crawford, C.S., Hatch, N.A., Fabian, A.C., Sanders, J.S., (2005) MNRAS, 363, p. 216; Croton, D.J., (2006) MNRAS, 365, p. 11; De Vaucouleurs, G., De Vaucouleurs, A., Corwin Jr., H.G., Buta, R.J., Paturel, G., Fouqué, P., (1991) Third Reference Catalogue of Bright Galaxies, 13. , Springer. 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PY - 2009

Y1 - 2009

N2 - We present integral field spectroscopy of the nebular line emission in a sample of nine brightest cluster galaxies (BCGs). The sample was chosen to probe both cooling flow and non-cooling flow clusters, as well as a range of cluster X-ray luminosities. The line emission morphology and velocity gradients suggest a great diversity in the properties of the line emitting gas. While some BCGs show evidence for filamentary or patchy emission (Abell 1060, Abell 1668 and MKW 3s), others have extended emission (Abell 1204, Abell 2199), while still others have centrally concentrated emission (Abell 2052). We examine diagnostic line ratios to determine the dominant ionization mechanisms in each galaxy. Most of the galaxies show regions with active galactic nucleus like spectra, however, for two BCGs, Abell 1060 and Abell 1204, the emission line diagnostics suggest regions which can be described by the emission from young stellar populations. The diversity of emission-line properties in our sample of BCGs suggests that the emission mechanism is not universal, with different ionization processes dominating different systems. Given this diversity, there is no evidence for a clear distinction of the emission-line properties between cooling flow and non-cooling flow BCGs. It is not always cooling flow BCGs which show emission (or young stellar populations), and non-cooling flow BCGs which do not. © 2009 RAS.

AB - We present integral field spectroscopy of the nebular line emission in a sample of nine brightest cluster galaxies (BCGs). The sample was chosen to probe both cooling flow and non-cooling flow clusters, as well as a range of cluster X-ray luminosities. The line emission morphology and velocity gradients suggest a great diversity in the properties of the line emitting gas. While some BCGs show evidence for filamentary or patchy emission (Abell 1060, Abell 1668 and MKW 3s), others have extended emission (Abell 1204, Abell 2199), while still others have centrally concentrated emission (Abell 2052). We examine diagnostic line ratios to determine the dominant ionization mechanisms in each galaxy. Most of the galaxies show regions with active galactic nucleus like spectra, however, for two BCGs, Abell 1060 and Abell 1204, the emission line diagnostics suggest regions which can be described by the emission from young stellar populations. The diversity of emission-line properties in our sample of BCGs suggests that the emission mechanism is not universal, with different ionization processes dominating different systems. Given this diversity, there is no evidence for a clear distinction of the emission-line properties between cooling flow and non-cooling flow BCGs. It is not always cooling flow BCGs which show emission (or young stellar populations), and non-cooling flow BCGs which do not. © 2009 RAS.

KW - Cooling flows

KW - Galaxies: clusters: general

KW - Galaxies: clusters: individual: A1060

KW - Galaxies: evolution

KW - Galaxies: stellar content

KW - Stars: formation

U2 - 10.1111/j.1365-2966.2009.14897.x

DO - 10.1111/j.1365-2966.2009.14897.x

M3 - Article

SN - 0035-8711

VL - 396

SP - 1953

EP - 1971

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

IS - 4

ER -

The diverse nature of optical emission lines in brightest cluster galaxies: IFU observations of the central kiloparsec

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