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

Alexander Von Boetticher; Amaury H.M.J. Triaud; DIdier Queloz; Sam Gill; Monika Lendl; Laetitia Delrez; David R. Anderson; Andrew Collier Cameron; Francesca Faedi; Michaël Gillon; Yilen Gómez Maqueo Chew; Leslie Hebb; Coel Hellier; Emmanuël Jehin; Pierre F.L. Maxted; David V. Martin; Francesco Pepe; Don Pollacco; Damien Ségransan; Barry Smalley; Stéphane Udry; Richard West

doi:10.1051/0004-6361/201731107

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

Alexander Von Boetticher, Amaury H.M.J. Triaud, DIdier Queloz, Sam Gill, Monika Lendl, Laetitia Delrez, David R. Anderson, Andrew Collier Cameron, Francesca Faedi, Michaël Gillon, Yilen Gómez Maqueo Chew, Leslie Hebb, Coel Hellier, Emmanuël Jehin, Pierre F.L. Maxted, David V. Martin, Francesco Pepe, Don Pollacco, Damien Ségransan, Barry SmalleyStéphane Udry, Richard West

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

Abstract

We report the discovery of an eclipsing binary system with mass-ratio q ∼ 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 ± 4 M_Jup (0.081 M_⊙) and a radius of 0.84^{+ 0.14} _-0.04R_Jup (0.084 R_⊙) that is comparable to that of Saturn. EBLM J0555-57Ab has a surface gravity log g₂ =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.

Original language	English
Article number	L6
Number of pages	6
Journal	Astronomy & Astrophysics
Volume	604
DOIs	https://doi.org/10.1051/0004-6361/201731107
Publication status	Published - 1 Aug 2017

Keywords

Binaries: eclipsing
Binaries: spectroscopic
Stars: individual: EBLM J0555-57Ab
Stars: low-mass
Techniques: photometric
Techniques: spectroscopic

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10.1051/0004-6361/201731107

Cameron_2017_AandA_EBLMIII_AAM
© ESO, 2017. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1051/0004-6361/201731107
Accepted author manuscript, 687 KB

https://arxiv.org/abs/1706.08781

Astronomy at St Andrews 2015-2018: Astronomy at St Andrews 2015-2018
Jardine, M. M. (PI), Cameron, A. C. (CoI), Cyganowski, C. J. (CoI), Horne, K. D. (CoI) & Wood, K. (CoI)
Science & Technology Facilities Council
1/04/15 → 31/03/18
Project: Standard

EBLM J0555-57 photometry and RV
Von Boetticher, A. (Creator), Triaud, A. H. M. J. (Creator), Queloz, D. (Creator), Gill, S. (Creator), Lendl, M. (Creator), Delrez, L. (Creator), Anderson, D. R. (Creator), Cameron, A. C. (Creator), Faedi, F. (Creator), Gillon, M. (Creator), Chew, Y. G. M. (Creator), Hebb, L. (Creator), Hellier, C. (Creator), Jehin, E. (Creator), Maxted, P. F. L. (Creator), Martin, D. V. (Creator), Pepe, F. (Creator), Pollacco, D. (Creator), Ségransan, D. (Creator), Smalley, B. (Creator), Udry, S. (Creator) & West, R. (Creator), VizieR On-line Data Catalog, 2017
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/604/L6
Dataset

Cite this

Von Boetticher, A., Triaud, A. H. M. J., Queloz, DI., Gill, S., Lendl, M., Delrez, L., Anderson, D. R., Cameron, A. C., Faedi, F., Gillon, M., Chew, Y. G. M., 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 & Astrophysics, 604, Article L6. https://doi.org/10.1051/0004-6361/201731107

@article{8d06bb36aef04b5f8aca3737133d9213,

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 ∼ 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 ± 4 MJup (0.081 M⊙) and a radius of 0.84+ 0.14 -0.04RJup (0.084 R⊙) that is comparable to that of Saturn. EBLM J0555-57Ab has a surface gravity log g2 =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.",

keywords = "Binaries: eclipsing, Binaries: spectroscopic, Stars: individual: EBLM J0555-57Ab, Stars: low-mass, Techniques: photometric, Techniques: spectroscopic",

author = "{Von Boetticher}, Alexander and Triaud, {Amaury H.M.J.} and DIdier Queloz and Sam Gill and Monika Lendl and Laetitia Delrez and Anderson, {David R.} and Cameron, {Andrew Collier} and Francesca Faedi and Micha{\"e}l Gillon and Chew, {Yilen G{\'o}mez Maqueo} and Leslie Hebb and Coel Hellier and Emmanu{\"e}l Jehin and Maxted, {Pierre F.L.} and Martin, {David V.} and Francesco Pepe and Don Pollacco and Damien S{\'e}gransan and Barry Smalley and St{\'e}phane Udry and Richard West",

note = "This work was partially supported by a grant from the Simons Foundation (PI Queloz, grant number 327127). ",

year = "2017",

month = aug,

day = "1",

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

language = "English",

volume = "604",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = "EDP SCIENCES S A",

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Von Boetticher, A, Triaud, AHMJ, Queloz, DI, Gill, S, Lendl, M, Delrez, L, Anderson, DR, Cameron, AC, Faedi, F, Gillon, M, Chew, YGM, 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 & Astrophysics, vol. 604, L6. https://doi.org/10.1051/0004-6361/201731107

TY - JOUR

T1 - The EBLM project

T2 - III. A Saturn-size low-mass star at the hydrogen-burning limit

AU - Von Boetticher, Alexander

AU - Triaud, Amaury H.M.J.

AU - Queloz, DIdier

AU - Gill, Sam

AU - Lendl, Monika

AU - Delrez, Laetitia

AU - Anderson, David R.

AU - Cameron, Andrew Collier

AU - Faedi, Francesca

AU - Gillon, Michaël

AU - Chew, Yilen Gómez Maqueo

AU - Hebb, Leslie

AU - Hellier, Coel

AU - Jehin, Emmanuël

AU - Maxted, Pierre F.L.

AU - Martin, David V.

AU - Pepe, Francesco

AU - Pollacco, Don

AU - Ségransan, Damien

AU - Smalley, Barry

AU - Udry, Stéphane

AU - West, Richard

N1 - This work was partially supported by a grant from the Simons Foundation (PI Queloz, grant number 327127).

PY - 2017/8/1

Y1 - 2017/8/1

N2 - We report the discovery of an eclipsing binary system with mass-ratio q ∼ 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 ± 4 MJup (0.081 M⊙) and a radius of 0.84+ 0.14 -0.04RJup (0.084 R⊙) that is comparable to that of Saturn. EBLM J0555-57Ab has a surface gravity log g2 =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.

AB - We report the discovery of an eclipsing binary system with mass-ratio q ∼ 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 ± 4 MJup (0.081 M⊙) and a radius of 0.84+ 0.14 -0.04RJup (0.084 R⊙) that is comparable to that of Saturn. EBLM J0555-57Ab has a surface gravity log g2 =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.

KW - Binaries: eclipsing

KW - Binaries: spectroscopic

KW - Stars: individual: EBLM J0555-57Ab

KW - Stars: low-mass

KW - Techniques: photometric

KW - Techniques: spectroscopic

U2 - 10.1051/0004-6361/201731107

DO - 10.1051/0004-6361/201731107

M3 - Article

AN - SCOPUS:85026827651

SN - 0004-6361

VL - 604

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - L6

ER -

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

Abstract

Keywords

Access to Document

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Projects

Astronomy at St Andrews 2015-2018: Astronomy at St Andrews 2015-2018

Datasets

EBLM J0555-57 photometry and RV

Cite this