Discovery of a low-mass companion to a metal-rich F star with the MARVELS pilot project

Scott W. Fleming, Jian Ge, Suvrath Mahadevan, Brian Lee, Jason D. Eastman, Robert J. Siverd, B. Scott Gaudi, Andrzej Niedzielski, Thirupathi Sivarani, Keivan G. Stassun, Alex Wolszczan, Rory Barnes, Bruce Gary, Duy Cuong Nguyen, Robert C. Morehead, Xiaoke Wan, Bo Zhao, Jian Liu, Pengcheng Guo, Stephen R. KaneJulian C. Van Eyken, Nathan M. De Lee, Justin R. Crepp, Alaina C. Shelden, Chris Laws, John P. Wisniewski, Donald P. Schneider, Joshua Pepper, Stephanie A. Snedden, Kaike Pan, Dmitry Bizyaev, Howard Brewington, Olena Malanushenko, Viktor Malanushenko, Daniel Oravetz, Audrey Simmons, Shannon Watters

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We report the discovery of a low-mass companion orbiting the metal-rich, main sequence F star TYC 2949-00557-1 during the Multi-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS) pilot project. The host star has an effective temperature Teff = 6135±40 K, logg = 4.4±0.1, and [Fe/H] = 0.32±0.01, indicating a mass of M = 1.25 ± 0.09M and R = 1.15 ± 0.15R. The companion has an orbital period of 5.69449 ± 0.00023 days and straddles the hydrogen burning limit with a minimum mass of 64 MJ, and thus may be an example of the rare class of brown dwarfs orbiting at distances comparable to those of "Hot Jupiters." We present relative photometry that demonstrates that the host star is photometrically stable at the few millimagnitude level on time scales of hours to years, and rules out transits for a companion of radius ≳ 0.8RJ at the 95% confidence level. Tidal analysis of the system suggests that the star and companion are likely in a double synchronous state where both rotational and orbital synchronization have been achieved. This is the first low-mass companion detected with a multi-object, dispersed, fixed-delay interferometer.

Original languageEnglish (US)
Pages (from-to)1186-1199
Number of pages14
JournalAstrophysical Journal
Volume718
Issue number2
DOIs
StatePublished - Aug 1 2010

Fingerprint

F stars
extrasolar planets
radial velocity
metal
stars
metals
orbitals
main sequence stars
transit
interferometer
Jupiter (planet)
Jupiter
photometry
confidence
synchronism
interferometers
hydrogen
timescale
radii
pilot project

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Fleming, Scott W. ; Ge, Jian ; Mahadevan, Suvrath ; Lee, Brian ; Eastman, Jason D. ; Siverd, Robert J. ; Gaudi, B. Scott ; Niedzielski, Andrzej ; Sivarani, Thirupathi ; Stassun, Keivan G. ; Wolszczan, Alex ; Barnes, Rory ; Gary, Bruce ; Nguyen, Duy Cuong ; Morehead, Robert C. ; Wan, Xiaoke ; Zhao, Bo ; Liu, Jian ; Guo, Pengcheng ; Kane, Stephen R. ; Van Eyken, Julian C. ; De Lee, Nathan M. ; Crepp, Justin R. ; Shelden, Alaina C. ; Laws, Chris ; Wisniewski, John P. ; Schneider, Donald P. ; Pepper, Joshua ; Snedden, Stephanie A. ; Pan, Kaike ; Bizyaev, Dmitry ; Brewington, Howard ; Malanushenko, Olena ; Malanushenko, Viktor ; Oravetz, Daniel ; Simmons, Audrey ; Watters, Shannon. / Discovery of a low-mass companion to a metal-rich F star with the MARVELS pilot project. In: Astrophysical Journal. 2010 ; Vol. 718, No. 2. pp. 1186-1199.
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abstract = "We report the discovery of a low-mass companion orbiting the metal-rich, main sequence F star TYC 2949-00557-1 during the Multi-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS) pilot project. The host star has an effective temperature Teff = 6135±40 K, logg = 4.4±0.1, and [Fe/H] = 0.32±0.01, indicating a mass of M = 1.25 ± 0.09M⊙ and R = 1.15 ± 0.15R⊙. The companion has an orbital period of 5.69449 ± 0.00023 days and straddles the hydrogen burning limit with a minimum mass of 64 MJ, and thus may be an example of the rare class of brown dwarfs orbiting at distances comparable to those of {"}Hot Jupiters.{"} We present relative photometry that demonstrates that the host star is photometrically stable at the few millimagnitude level on time scales of hours to years, and rules out transits for a companion of radius ≳ 0.8RJ at the 95{\%} confidence level. Tidal analysis of the system suggests that the star and companion are likely in a double synchronous state where both rotational and orbital synchronization have been achieved. This is the first low-mass companion detected with a multi-object, dispersed, fixed-delay interferometer.",
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Fleming, SW, Ge, J, Mahadevan, S, Lee, B, Eastman, JD, Siverd, RJ, Gaudi, BS, Niedzielski, A, Sivarani, T, Stassun, KG, Wolszczan, A, Barnes, R, Gary, B, Nguyen, DC, Morehead, RC, Wan, X, Zhao, B, Liu, J, Guo, P, Kane, SR, Van Eyken, JC, De Lee, NM, Crepp, JR, Shelden, AC, Laws, C, Wisniewski, JP, Schneider, DP, Pepper, J, Snedden, SA, Pan, K, Bizyaev, D, Brewington, H, Malanushenko, O, Malanushenko, V, Oravetz, D, Simmons, A & Watters, S 2010, 'Discovery of a low-mass companion to a metal-rich F star with the MARVELS pilot project', Astrophysical Journal, vol. 718, no. 2, pp. 1186-1199. https://doi.org/10.1088/0004-637X/718/2/1186

Discovery of a low-mass companion to a metal-rich F star with the MARVELS pilot project. / Fleming, Scott W.; Ge, Jian; Mahadevan, Suvrath; Lee, Brian; Eastman, Jason D.; Siverd, Robert J.; Gaudi, B. Scott; Niedzielski, Andrzej; Sivarani, Thirupathi; Stassun, Keivan G.; Wolszczan, Alex; Barnes, Rory; Gary, Bruce; Nguyen, Duy Cuong; Morehead, Robert C.; Wan, Xiaoke; Zhao, Bo; Liu, Jian; Guo, Pengcheng; Kane, Stephen R.; Van Eyken, Julian C.; De Lee, Nathan M.; Crepp, Justin R.; Shelden, Alaina C.; Laws, Chris; Wisniewski, John P.; Schneider, Donald P.; Pepper, Joshua; Snedden, Stephanie A.; Pan, Kaike; Bizyaev, Dmitry; Brewington, Howard; Malanushenko, Olena; Malanushenko, Viktor; Oravetz, Daniel; Simmons, Audrey; Watters, Shannon.

In: Astrophysical Journal, Vol. 718, No. 2, 01.08.2010, p. 1186-1199.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Discovery of a low-mass companion to a metal-rich F star with the MARVELS pilot project

AU - Fleming, Scott W.

AU - Ge, Jian

AU - Mahadevan, Suvrath

AU - Lee, Brian

AU - Eastman, Jason D.

AU - Siverd, Robert J.

AU - Gaudi, B. Scott

AU - Niedzielski, Andrzej

AU - Sivarani, Thirupathi

AU - Stassun, Keivan G.

AU - Wolszczan, Alex

AU - Barnes, Rory

AU - Gary, Bruce

AU - Nguyen, Duy Cuong

AU - Morehead, Robert C.

AU - Wan, Xiaoke

AU - Zhao, Bo

AU - Liu, Jian

AU - Guo, Pengcheng

AU - Kane, Stephen R.

AU - Van Eyken, Julian C.

AU - De Lee, Nathan M.

AU - Crepp, Justin R.

AU - Shelden, Alaina C.

AU - Laws, Chris

AU - Wisniewski, John P.

AU - Schneider, Donald P.

AU - Pepper, Joshua

AU - Snedden, Stephanie A.

AU - Pan, Kaike

AU - Bizyaev, Dmitry

AU - Brewington, Howard

AU - Malanushenko, Olena

AU - Malanushenko, Viktor

AU - Oravetz, Daniel

AU - Simmons, Audrey

AU - Watters, Shannon

PY - 2010/8/1

Y1 - 2010/8/1

N2 - We report the discovery of a low-mass companion orbiting the metal-rich, main sequence F star TYC 2949-00557-1 during the Multi-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS) pilot project. The host star has an effective temperature Teff = 6135±40 K, logg = 4.4±0.1, and [Fe/H] = 0.32±0.01, indicating a mass of M = 1.25 ± 0.09M⊙ and R = 1.15 ± 0.15R⊙. The companion has an orbital period of 5.69449 ± 0.00023 days and straddles the hydrogen burning limit with a minimum mass of 64 MJ, and thus may be an example of the rare class of brown dwarfs orbiting at distances comparable to those of "Hot Jupiters." We present relative photometry that demonstrates that the host star is photometrically stable at the few millimagnitude level on time scales of hours to years, and rules out transits for a companion of radius ≳ 0.8RJ at the 95% confidence level. Tidal analysis of the system suggests that the star and companion are likely in a double synchronous state where both rotational and orbital synchronization have been achieved. This is the first low-mass companion detected with a multi-object, dispersed, fixed-delay interferometer.

AB - We report the discovery of a low-mass companion orbiting the metal-rich, main sequence F star TYC 2949-00557-1 during the Multi-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS) pilot project. The host star has an effective temperature Teff = 6135±40 K, logg = 4.4±0.1, and [Fe/H] = 0.32±0.01, indicating a mass of M = 1.25 ± 0.09M⊙ and R = 1.15 ± 0.15R⊙. The companion has an orbital period of 5.69449 ± 0.00023 days and straddles the hydrogen burning limit with a minimum mass of 64 MJ, and thus may be an example of the rare class of brown dwarfs orbiting at distances comparable to those of "Hot Jupiters." We present relative photometry that demonstrates that the host star is photometrically stable at the few millimagnitude level on time scales of hours to years, and rules out transits for a companion of radius ≳ 0.8RJ at the 95% confidence level. Tidal analysis of the system suggests that the star and companion are likely in a double synchronous state where both rotational and orbital synchronization have been achieved. This is the first low-mass companion detected with a multi-object, dispersed, fixed-delay interferometer.

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