The EBLM project. III. A Saturn-size low-mass star at the hydrogen-burning limit

A. von Boetticher; A.~H.~M.~J. Triaud; Didier Queloz; S. Gill; M. Lendl; L. Delrez; D.~R. Anderson; A. Collier Cameron; F. Faedi; Michael Gillon; Y. Gómez Maqueo Chew; L. Hebb; C. Hellier; E. Jehin; P.~F.~L. Maxted; D.~V. Martin; F. Pepe; D. Pollacco; D. Ségransan; B. Smalley; S. Udry; R. West

doi:10.1051/0004-6361/201731107

The EBLM project. III. A Saturn-size low-mass star at the hydrogen-burning limit

A. von Boetticher
, A.~H.~M.~J. Triaud
, Didier Queloz
, S. Gill
, M. Lendl
, L. Delrez
, D.~R. Anderson
, A. Collier Cameron
, F. Faedi
, Michael Gillon
, Y. Gómez Maqueo Chew
, L. Hebb
, C. Hellier
, E. Jehin
, P.~F.~L. Maxted
, D.~V. Martin
, F. Pepe
, D. Pollacco
, D. Ségransan
, B. Smalley

S. Udry, R. West

Physics and Astronomy

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

12 Citations (Scopus)

Abstract

We report the discovery of an eclipsing binary system with mass-ratio q tilde 0.07. After identifying a periodic photometric signal received by WASP, we obtained CORALIE spectroscopic radial velocities and follow-up light curves with the Euler and TRAPPIST telescopes. From a joint fit of these data we determine that EBLM J0555-57 consists of a sun-like primary star that is eclipsed by a low-mass companion, on a weakly eccentric 7.8-day orbit. Using a mass estimate for the primary star derived from stellar models, we determine a companion mass of 85 plusmn 4 M$_Jup$ (0.081 M$_⊙$) and a radius of 0.84$^+ 0.14$$_-0.04$R$_Jup$ (0.084 R$_⊙$) that is comparable to that of Saturn. EBLM J0555-57Ab has a surface gravity log g$_2$ =5.50$^+ 0.03$$_-0.13$ and is one of the densest non-stellar-remnant objects currently known. These measurements are consistent with models of low-mass stars. The photometry tables and radial velocities are only available at the CDS and on demand via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/604/L6

Original language	English
Pages (from-to)	L6
Journal	Astronomy and Astrophysics
Volume	604
DOIs	https://doi.org/10.1051/0004-6361/201731107
Publication status	Published - 1 Aug 2017

Keywords

stars: individual: EBLM J0555-57Ab
binaries: eclipsing
binaries: spectroscopic
stars: low-mass
techniques: spectroscopic
techniques: photometric

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von Boetticher, A., Triaud, A. H. M. J., Queloz, D., Gill, S., Lendl, M., Delrez, L., Anderson, D. R., Collier Cameron, A., Faedi, F., Gillon, M., Gómez Maqueo Chew, Y., Hebb, L., Hellier, C., Jehin, E., Maxted, P. F. L., Martin, D. V., Pepe, F., Pollacco, D., Ségransan, D., ... West, R. (2017). The EBLM project. III. A Saturn-size low-mass star at the hydrogen-burning limit. Astronomy and Astrophysics, 604, L6. https://doi.org/10.1051/0004-6361/201731107

@article{380a78fa3c854d80893727755c547f94,

title = "The EBLM project. III. A Saturn-size low-mass star at the hydrogen-burning limit",

abstract = "We report the discovery of an eclipsing binary system with mass-ratio q tilde 0.07. After identifying a periodic photometric signal received by WASP, we obtained CORALIE spectroscopic radial velocities and follow-up light curves with the Euler and TRAPPIST telescopes. From a joint fit of these data we determine that EBLM J0555-57 consists of a sun-like primary star that is eclipsed by a low-mass companion, on a weakly eccentric 7.8-day orbit. Using a mass estimate for the primary star derived from stellar models, we determine a companion mass of 85 plusmn 4 M\$\_Jup\$ (0.081 M\$\_⊙\$) and a radius of 0.84\$\textasciicircum{}+ 0.14\$\$\_-0.04\$R\$\_Jup\$ (0.084 R\$\_⊙\$) that is comparable to that of Saturn. EBLM J0555-57Ab has a surface gravity log g\$\_2\$ =5.50\$\textasciicircum{}+ 0.03\$\$\_-0.13\$ and is one of the densest non-stellar-remnant objects currently known. These measurements are consistent with models of low-mass stars. The photometry tables and radial velocities are only available at the CDS and on demand via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/604/L6 ",

keywords = "stars: individual: EBLM J0555-57Ab, binaries: eclipsing, binaries: spectroscopic, stars: low-mass, techniques: spectroscopic, techniques: photometric",

author = "\{von Boetticher\}, A. and A.\textasciitilde{}H.\textasciitilde{}M.\textasciitilde{}J. Triaud and Didier Queloz and S. Gill and M. Lendl and L. Delrez and D.\textasciitilde{}R. Anderson and \{Collier Cameron\}, A. and F. Faedi and Michael Gillon and \{G{\'o}mez Maqueo Chew\}, Y. and L. Hebb and C. Hellier and E. Jehin and P.\textasciitilde{}F.\textasciitilde{}L. Maxted and D.\textasciitilde{}V. Martin and F. Pepe and D. Pollacco and D. S{\'e}gransan and B. Smalley and S. Udry and R. West",

year = "2017",

month = aug,

day = "1",

doi = "10.1051/0004-6361/201731107",

language = "English",

volume = "604",

pages = "L6",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

von Boetticher, A, Triaud, AHMJ, Queloz, D, Gill, S, Lendl, M, Delrez, L, Anderson, DR, Collier Cameron, A, Faedi, F, Gillon, M, Gómez Maqueo Chew, Y, Hebb, L, Hellier, C, Jehin, E, Maxted, PFL, Martin, DV, Pepe, F, Pollacco, D, Ségransan, D, Smalley, B, Udry, S & West, R 2017, 'The EBLM project. III. A Saturn-size low-mass star at the hydrogen-burning limit', Astronomy and Astrophysics, vol. 604, pp. L6. https://doi.org/10.1051/0004-6361/201731107

TY - JOUR

T1 - The EBLM project. III. A Saturn-size low-mass star at the hydrogen-burning limit

AU - von Boetticher, A.

AU - Triaud, A.~H.~M.~J.

AU - Queloz, Didier

AU - Gill, S.

AU - Lendl, M.

AU - Delrez, L.

AU - Anderson, D.~R.

AU - Collier Cameron, A.

AU - Faedi, F.

AU - Gillon, Michael

AU - Gómez Maqueo Chew, Y.

AU - Hebb, L.

AU - Hellier, C.

AU - Jehin, E.

AU - Maxted, P.~F.~L.

AU - Martin, D.~V.

AU - Pepe, F.

AU - Pollacco, D.

AU - Ségransan, D.

AU - Smalley, B.

AU - Udry, S.

AU - West, R.

PY - 2017/8/1

Y1 - 2017/8/1

N2 - We report the discovery of an eclipsing binary system with mass-ratio q tilde 0.07. After identifying a periodic photometric signal received by WASP, we obtained CORALIE spectroscopic radial velocities and follow-up light curves with the Euler and TRAPPIST telescopes. From a joint fit of these data we determine that EBLM J0555-57 consists of a sun-like primary star that is eclipsed by a low-mass companion, on a weakly eccentric 7.8-day orbit. Using a mass estimate for the primary star derived from stellar models, we determine a companion mass of 85 plusmn 4 M$_Jup$ (0.081 M$_⊙$) and a radius of 0.84$^+ 0.14$$_-0.04$R$_Jup$ (0.084 R$_⊙$) that is comparable to that of Saturn. EBLM J0555-57Ab has a surface gravity log g$_2$ =5.50$^+ 0.03$$_-0.13$ and is one of the densest non-stellar-remnant objects currently known. These measurements are consistent with models of low-mass stars. The photometry tables and radial velocities are only available at the CDS and on demand via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/604/L6

AB - We report the discovery of an eclipsing binary system with mass-ratio q tilde 0.07. After identifying a periodic photometric signal received by WASP, we obtained CORALIE spectroscopic radial velocities and follow-up light curves with the Euler and TRAPPIST telescopes. From a joint fit of these data we determine that EBLM J0555-57 consists of a sun-like primary star that is eclipsed by a low-mass companion, on a weakly eccentric 7.8-day orbit. Using a mass estimate for the primary star derived from stellar models, we determine a companion mass of 85 plusmn 4 M$_Jup$ (0.081 M$_⊙$) and a radius of 0.84$^+ 0.14$$_-0.04$R$_Jup$ (0.084 R$_⊙$) that is comparable to that of Saturn. EBLM J0555-57Ab has a surface gravity log g$_2$ =5.50$^+ 0.03$$_-0.13$ and is one of the densest non-stellar-remnant objects currently known. These measurements are consistent with models of low-mass stars. The photometry tables and radial velocities are only available at the CDS and on demand via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/604/L6

KW - stars: individual: EBLM J0555-57Ab

KW - binaries: eclipsing

KW - binaries: spectroscopic

KW - stars: low-mass

KW - techniques: spectroscopic

KW - techniques: photometric

UR - https://www.scopus.com/pages/publications/85026827651

U2 - 10.1051/0004-6361/201731107

DO - 10.1051/0004-6361/201731107

M3 - Article

SN - 0004-6361

VL - 604

SP - L6

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

The EBLM project. III. A Saturn-size low-mass star at the hydrogen-burning limit

Abstract

Keywords

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