Abstract
We present the global group properties of two samples of galaxy groups containing 39 high-quality X-ray-selected systems and 38 optically (spectroscopically) selected systems in coincident spatial regions at 0.12 < z < 0.79. The total mass range of the combined sample is ~(1012-5) × 1014 M☉. Only nine optical systems are associable with X-ray systems. We discuss the confusion inherent in the matching of both galaxies to extended X-ray emission and of X-ray emission to already identified optical systems. Extensive spectroscopy has been obtained and the resultant redshift catalog and group membership are provided here. X-ray, dynamical, and total stellar masses of the groups are also derived and presented. We explore the effects of utilizing different centers and applying three different kinds of radial cut to our systems: a constant cut of 1 Mpc and two r200 cuts, one based on the velocity dispersion of the system and the other on the X-ray emission. We find that an X-ray-based r200 results in less scatter in scaling relations and less dynamical complexity as evidenced by results of the Anderson-Darling and Dressler-Schectman tests, indicating that this radius tends to isolate the virialized part of the system. The constant and velocity dispersion based cuts can overestimate membership and can work to inflate velocity dispersion and dynamical and stellar mass. We find LX -σ and Mstellar-LX scaling relations for X-ray and optically selected systems are not dissimilar. The mean fraction of mass found in stars, excluding intracluster light, for our systems is ~0.014 with a logarithmic standard deviation of 0.398 dex. We also define and investigate a sample of groups which are X-ray underluminous given the total group stellar mass. For these systems the fraction of stellar mass contributed by the most massive galaxy is typically lower than that found for the total population of groups implying that there may be less intragroup medium contributed from the most massive member in these systems. Eighty percent of 15 underluminous groups have less than 40% of their stellar mass in the most massive galaxy which happens in less than 1% of cases with samples matched in stellar mass, taken from the combined group catalog.
| Original language | English |
|---|---|
| Article number | 139 |
| Number of pages | 27 |
| Journal | The Astrophysical Journal |
| Volume | 756 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 10 Sept 2012 |
Bibliographical note
Export Date: 15 August 2017Correspondence Address: Connelly, J.L.; Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, D-85748 Garching, Germany
References: Andreon, S., (2010) MNRAS, 407, p. 263. , 10.1111/j.1365-2966.2010.16856.x 0035-8711; Andreon, S., Moretti, A., (2011) A&A, 536, pp. A37. , 10.1051/0004-6361/201116761 0004-6361; Appenzeller, I., Fricke, K., Fürtig, W., (1998) Messenger, 94, p. 1; Balogh, M.L., Babul, A., Voit, G.M., (2006) MNRAS, 366, p. 624. , 10.1111/j.1365-2966.2005.09917.x 0035-8711; Balogh, M.L., Mazzotta, P., Bower, R.G., (2011) MNRAS, 412, p. 947. , 10.1111/j.1365-2966.2010.18052.x 0035-8711; Balogh, M.L., McGee, S.L., Wilman, D., (2009) MNRAS, 398, p. 754. , 10.1111/j.1365-2966.2009.15193.x 0035-8711; Balogh, M.L., McGee, S.L., Wilman, D.J., (2011) MNRAS, 412, p. 2303. , 10.1111/j.1365-2966.2010.18052.x 0035-8711; Balogh, M.L., Wilman, D., Henderson, R.D.E., (2007) MNRAS, 374, p. 1169. , 10.1111/j.1365-2966.2006.11235.x 0035-8711; Beers, T.C., Flynn, K., Gebhardt, K., (1990) AJ, 100, p. 32. , 10.1086/115487; Bruzual, G., Charlot, S., Stellar population synthesis at the resolution of 2003 (2003) Monthly Notices of the Royal Astronomical Society, 344 (4), pp. 1000-1028. , DOI 10.1046/j.1365-8711.2003.06897.x; Cappellari, M., Bacon, R., Bureau, M., Damen, M.C., Davies, R.L., De Zeeuw, P.T., Emsellem, E., Van De Ven, G., The SAURON project - IV. The mass-to-light ratio, the virial mass estimator and the Fundamental Plane of elliptical and lenticular galaxies (2006) Monthly Notices of the Royal Astronomical Society, 366 (4), pp. 1126-1150. , DOI 10.1111/j.1365-2966.2005.09981.x; Carlberg, R.G., Yee, H.K.C., Ellingson, E., (1997) ApJ, 478 (2), p. 462. , 10.1086/303805 0004-637X 462; Carlberg, R.G., Yee, H.K.C., Morris, S.L., (1999) Phil. Trans. R. Soc. A, 357, p. 167. , 10.1098/rsta.1999.0321; Carlberg, R.G., Yee, H.K.C., Morris, S.L., (2001) ApJ, 552 (2), p. 427. , 10.1086/320555 0004-637X 427; Chabrier, G., The galactic disk mass function: Reconciliation of the Hubble space telescope and nearby determinations (2003) Astrophysical Journal, 586, pp. L133-L136. , DOI 10.1086/374879; Charlot, S., Fall, S.M., (2000) ApJ, 539 (2), p. 718. , 10.1086/309250 0004-637X 718; Christensen, N., Meyer, R., (2000); Cooper, M.C., Newman, J.A., Coil, A.L., (2007) MNRAS, 376, p. 1445. , 10.1111/j.1365-2966.2007.11534.x 0035-8711; D'Agostino, R., Stephens, M., (1986) Goodness-of-fit Techniques; Davis, M., Faber, S.M., Newman, J., (2003) Proc. SPIE, 4834, p. 161. , 10.1117/12.457897; Davis, M., Guhathakurta, P., Konidaris, N.P., (2007) ApJ, 660 (1), pp. L1. , 10.1086/517931 1538-4357 L1; Dressler, A., Shectman, S.A., (1988) AJ, 95, p. 985. , 10.1086/114694 1548-9558; Dunkley, J., Komatsu, E., Nolta, M.R., (2009) ApJS, 180 (2), p. 306. , 10.1088/0067-0049/180/2/306 0067-0049 306; Efron, B., (1982) The Jackknife, the Bootstrap, and Other Resampling Plans, , 10.1137/1.9781611970319; Eke, V.R., Baugh, C.M., Cole, S., (2004) MNRAS, 348, p. 866. , 10.1111/j.1365-2966.2004.07408.x 0035-8711; Eke, V.R., Baugh, C.M., Cole, S., Frenk, C.S., King, H.M., Peacock, J.A., Where are the stars? (2005) Monthly Notices of the Royal Astronomical Society, 362 (4), pp. 1233-1246. , DOI 10.1111/j.1365-2966.2005.09384.x; Finoguenov, A., Connelly, J.L., Parker, L.C., (2009) ApJ, 704 (1), p. 564. , 10.1088/0004-637X/704/1/564 0004-637X 564; Finoguenov, A., Guzzo, L., Hasinger, G., (2007) ApJS, 172 (1), p. 182. , 10.1086/516577 0067-0049 182; Gerke, B.F., Newman, J.A., Faber, S.M., (2007) MNRAS, 376, p. 1425. , 10.1111/j.1365-2966.2007.11374.x 0035-8711; Gilks, W.R., Richardson, S., Spiegelhalter, D.J., (1996) Markov Chain Monte Carlo Methods in Practice; Giodini, S., Pierini, D., Finoguenov, A., (2009) ApJ, 703 (1), p. 982. , 10.1088/0004-637X/703/1/982 0004-637X 982; Girardi, M., Giuricin, G., Mardirossian, F., Mezzetti, M., Boschin, W., Optical Mass Estimates of Galaxy Clusters (1998) Astrophysical Journal, 505, pp. 74-95. , DOI 10.1086/306157; Girardi, M., Mezzetti, M., (2001) ApJ, 548 (1), p. 79. , 10.1086/318665 0004-637X 79; Glazebrook, K., Bland-Hawthorn, J., Microslit nod-shuffle spectroscopy: A technique for achieving very high densities of spectra (2001) Publications of the Astronomical Society of the Pacific, 113 (780), pp. 197-214. , DOI 10.1086/318625; Gonzalez, A.H., Zaritsky, D., Zabludoff, A.I., (2007) ApJ, 666 (1), p. 147. , 10.1086/519729 0004-637X 147; Henderson, R.D.E., (2010); Horner, D.J., (2001); Hou, A., Parker, L.C., Harris, W.E., Wilman, D.J., (2009) ApJ, 702 (2), p. 1199. , 10.1088/0004-637X/702/2/1199 0004-637X 1199; Hou, A., Parker, L.C., Wilman, D.J., (2012) MNRAS, 421, p. 3594. , 10.1111/j.1365-2966.2012.20586.x 0035-8711; Iovino, A., Cucciati, O., Scodeggio, M., (2010) A&A, 509, pp. A40. , 10.1051/0004-6361/200912558 0004-6361; Jeltema, T.E., Mulchaey, J.S., Lubin, L.M., (2008) ApJ, 685 (1), p. 138. , 10.1086/590550 0004-637X 138; Jeltema, T.E., Mulchaey, J.S., Lubin, L.M., Fassnacht, C.D., (2007) ApJ, 658 (2), p. 865. , 10.1086/511852 0004-637X 865; Kelly, B.C., (2007) ApJ, 665 (2), p. 1489. , 10.1086/519947 0004-637X 1489; Kelson, D.D., Optimal techniques in two-dimensional spectroscopy: Background subtraction for the 21st century (2003) Publications of the Astronomical Society of the Pacific, 115 (808), pp. 688-699. , DOI 10.1086/375502; Kovač, K., Lilly, S.J., Knobel, C., (2010) ApJ, 718 (1), p. 86. , 10.1088/0004-637X/718/1/86 0004-637X 86; Leauthaud, A., Finoguenov, A., Kneib, J., (2010) ApJ, 709 (1), p. 97. , 10.1088/0004-637X/709/1/97 0004-637X 97; Leauthaud, A., George, M.R., Behroozi, P.S., (2012) ApJ, 746 (1), p. 95. , 10.1088/0004-637X/746/1/95 0004-637X 95; Lilly, S.J., Le Brun, V., Maier, C., (2009) ApJS, 184 (2), p. 218. , 10.1088/0067-0049/184/2/218 0067-0049 218; Lokas, E.L., Mamon, G.A., Properties of spherical galaxies and clusters with an NFW density profile (2001) Monthly Notices of the Royal Astronomical Society, 321 (1), pp. 155-166. , DOI 10.1046/j.1365-8711.2001.04007.x; Mahdavi, A., Geller, M.J., (2001) ApJ, 554 (2), pp. L129. , 10.1086/321710 1538-4357 L129; McGee, S.L., Balogh, M.L., Henderson, R.D.E., (2008) MNRAS, 387, p. 1605. , 10.1111/j.1365-2966.2008.13340.x 0035-8711; McGee, S.L., Balogh, M.L., Wilman, D.J., (2011) MNRAS, 413, p. 996. , 10.1111/j.1365-2966.2010.18189.x 0035-8711; Mulchaey, J.S., Davis, D.S., Mushotzky, R.F., Burstein, D., (2003) ApJS, 145 (1), p. 39. , 10.1086/345736 0067-0049 39; Nelson, L., (1998) J. Qual. Technol., 30, p. 298. , 0022-4065; Osmond, J.P.F., Ponman, T.J., The GEMS project: X-ray analysis and statistical properties of the group sample (2004) Monthly Notices of the Royal Astronomical Society, 350 (4), pp. 1511-1535. , DOI 10.1111/j.1365-2966.2004.07742.x; Peeples, M.S., Shankar, F., (2011) MNRAS, 417, p. 2962. , 10.1111/j.1365-2966.2011.19456.x 0035-8711; Pinkney, J., Roettiger, K., Burns, J.O., Bird, C.M., (1996) ApJS, 104, p. 1. , 10.1086/192290 0067-0049; Aghanim, N., Arnaud, M., (2011) A&A, 536, pp. A12. , 10.1051/0004-6361/201116489 0004-6361; Popesso, P., Biviano, A., Bohringer, H., Romaniello, M., RASS-SDSS galaxy cluster survey V. The X-ray-underluminous Abell clusters (2007) Astronomy and Astrophysics, 461 (2), pp. 397-410. , DOI 10.1051/0004-6361:20054493; Pratt, G.W., Croston, J.H., Arnaud, M., Böhringer, H., (2009) A&A, 498, p. 361. , 10.1051/0004-6361/200810994 0004-6361; Ramella, M., Boschin, W., Geller, M.J., Mahdavi, A., Rines, K., K-band properties of well-sampled groups of galaxies (2004) Astronomical Journal, 128 (5), pp. 2022-2036. , DOI 10.1086/424862; Rykoff, E.S., Evrard, A.E., McKay, T.A., (2008) MNRAS, 387, pp. L28. , 10.1111/j.1745-3933.2008.00476.x 0035-8711; Salim, S., Rich, R.M., Charlot, S., (2007) ApJS, 173 (2), p. 267. , 10.1086/519218 0067-0049 267; Sanderson, A.J.R., Edge, A.C., Smith, G.P., (2009) MNRAS, 398, p. 1698. , 10.1111/j.1365-2966.2009.15214.x 0035-8711; Serra, A.L., Diaferio, A., Murante, G., Borgani, S., (2011) MNRAS, 412, p. 800. , 10.1111/j.1365-2966.2010.17946.x 0035-8711; Sun, M., Voit, G.M., Donahue, M., (2009) ApJ, 693 (2), p. 1142. , 10.1088/0004-637X/693/2/1142 0004-637X 1142; Wilman, D.J., Balogh, M.L., Bower, R.G., Mulchaey, J.S., Oemler Jr., A., Carlberg, R.G., Morris, S.L., Whitaker, R.J., Galaxy groups at 0.3 ≤ z ≤ 0.55-1. Group properties (2005) Monthly Notices of the Royal Astronomical Society, 358 (1), pp. 71-87. , DOI 10.1111/j.1365-2966.2005.08744.x; Wilman, D.J., Balogh, M.L., Bower, R.G., Mulchaey, J.S., Oemler Jr., A., Carlberg, R.G., Eke, V.R., Whitaker, R.J., Galaxy groups at 0.3 ≤ z ≤ 0.55 - II. Evolution to z ∼ 0 (2005) Monthly Notices of the Royal Astronomical Society, 358 (1), pp. 88-100. , DOI 10.1111/j.1365-2966.2005.08745.x; Wilman, D.J., Oemler, Jr.A., Mulchaey, J.S., (2009) ApJ, 692 (1), p. 298. , 10.1088/0004-637X/692/1/298 0004-637X 298; Wilman, D.J., Pierini, D., Tyler, K., (2008) ApJ, 680 (2), p. 1009. , 10.1086/587478 0004-637X 1009; Xue, Y.-J., Wu, X.-P., (2000) ApJ, 538 (1), p. 65. , 10.1086/309116 0004-637X 65; Yang, X., Mo, H.J., Van Den Bosch, F.C., (2009) ApJ, 695 (2), p. 900. , 10.1088/0004-637X/695/2/900 0004-637X 900; Yee, H.K.C., Morris, S.L., Lin, H., (2000) ApJS, 129 (2), p. 475. , 10.1086/313426 0067-0049 475; Zabludoff, A.I., Mulchaey, J.S., The Properties of Poor Groups of Galaxies. I. Spectroscopic Survey and Results (1998) Astrophysical Journal, 496, pp. 39-72. , DOI 10.1086/305355; Zabludoff, A.I., Mulchaey, J.S., (2000) ApJ, 539 (1), p. 136. , 10.1086/309191 0004-637X 136; Zhang, Y.-Y., Andernach, H., Caretta, C.A., (2011) A&A, 526, pp. A105. , 10.1051/0004-6361/201015830 0004-6361
Keywords
- galaxies: groups: general
- X-rays: galaxies: clusters