Bo Ma
University of Florida
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Featured researches published by Bo Ma.
The Astrophysical Journal | 2013
Joshua Pepper; Robert J. Siverd; Thomas G. Beatty; B. Scott Gaudi; Keivan G. Stassun; Jason D. Eastman; Karen A. Collins; David W. Latham; Allyson Bieryla; Lars A. Buchhave; Eric L. N. Jensen; Mark Manner; K. Penev; Justin R. Crepp; Phillip A. Cargile; Saurav Dhital; Michael L. Calkins; Gilbert A. Esquerdo; Perry L. Berlind; Benjamin J. Fulton; R. A. Street; Bo Ma; Jian Ge; Ji Wang; Qingqing Mao; Alexander J. W. Richert; Andrew Gould; D. L. DePoy; John F. Kielkopf; J. L. Marshall
We report the discovery of KELT-3b, a moderately inflated transiting hot Jupiter with a mass of 1.477 +0.066 −0.067 MJ, radius of 1.345 ± 0.072 RJ, and an orbital period of 2.7033904 ± 0.000010 days. The host star, KELT-3, is a V = 9.8 late F star with M∗ = 1.278 +0.063 −0.061 M� , R∗ = 1.472 +0.065 −0.067 R� , Teff = 6306 +5049 K, log(g) = 4.209 +0.033 −0.031, and [Fe/H] = 0.044 +0.080 −0.082 , and has a likely proper motion companion. KELT-3b is the third transiting exoplanet discovered by the KELT survey, and is orbiting one of the 20 brightest known transiting planet host stars, making it a promising candidate for detailed characterization studies. Although we infer that KELT-3 is significantly evolved, a preliminary analysis of the stellar and orbital evolution of the system suggests that the planet has likely always received a level of incident flux above the empirically identified threshold for radius inflation suggested by Demory & Seager.
The Astronomical Journal | 2012
John P. Wisniewski; Jian Ge; Justin R. Crepp; Nathan De Lee; Jason D. Eastman; Massimiliano Esposito; Scott W. Fleming; B. Scott Gaudi; Luan Ghezzi; Jonay I. González Hernández; Brian Leverett Lee; Keivan G. Stassun; Eric Agol; Carlos Allende Prieto; Rory Barnes; Dmitry Bizyaev; Phillip A. Cargile; Liang Chang; Luiz Nicolaci da Costa; G. F. Porto de Mello; Bruno Femenía; Letícia D. Ferreira; Bruce Gary; L. Hebb; Jon A. Holtzman; Jian Liu; Bo Ma; Claude E. Mack; Suvrath Mahadevan; Marcio A. G. Maia
TYC 4110-01037-1 has a low-mass stellar companion, whose small mass ratio and short orbital period are atypical among binary systems with solar-like (T eff 6000 K) primary stars. Our analysis of TYC 4110-01037-1 reveals it to be a moderately aged (5?Gyr) solar-like star having a mass of 1.07 ? 0.08 M ? and radius of 0.99 ? 0.18 R ?. We analyze 32 radial velocity (RV) measurements from the SDSS-III MARVELS survey as well as 6 supporting RV measurements from the SARG spectrograph on the 3.6 m Telescopio Nazionale Galileo telescope obtained over a period of ~2?years. The best Keplerian orbital fit parameters were found to have a period of 78.994 ? 0.012 days, an eccentricity of 0.1095 ? 0.0023, and a semi-amplitude of 4199 ? 11?m?s?1. We determine the minimum companion mass (if sin i = 1) to be 97.7 ? 5.8 M Jup. The systems companion to host star mass ratio, ?0.087 ? 0.003, places it at the lowest end of observed values for short period stellar companions to solar-like (T eff 6000 K) stars. One possible way to create such a system would be if a triple-component stellar multiple broke up into a short period, low q binary during the cluster dispersal phase of its lifetime. A candidate tertiary body has been identified in the system via single-epoch, high contrast imagery. If this object is confirmed to be comoving, we estimate it would be a dM4 star. We present these results in the context of our larger-scale effort to constrain the statistics of low-mass stellar and brown dwarf companions to FGK-type stars via the MARVELS survey.
The Astronomical Journal | 2012
Scott W. Fleming; Jian Ge; Rory Barnes; Thomas G. Beatty; Justin R. Crepp; Nathan De Lee; Massimiliano Esposito; Bruno Femenía; Letícia D. Ferreira; Bruce Gary; B. Scott Gaudi; Luan Ghezzi; Jonay I. González Hernández; L. Hebb; Peng Jiang; Brian Leverett Lee; Ben Nelson; Gustavo F. Porto de Mello; Benjamin J. Shappee; Keivan G. Stassun; Todd A. Thompson; Benjamin M. Tofflemire; John P. Wisniewski; W. Michael Wood-Vasey; Eric Agol; Carlos Allende Prieto; Dmitry Bizyaev; Howard J. Brewington; Phillip A. Cargile; Louis Coban
We report the discovery via radial velocity (RV) measurements of a short-period (P = 2.430420 ± 0.000006 days) companion to the F-type main-sequence star TYC 2930-00872-1. A long-term trend in the RV data also suggests the presence of a tertiary stellar companion with P > 2000 days. High-resolution spectroscopy of the host star yields T_(eff) = 6427 ± 33 K, log g = 4.52 ± 0.14, and [Fe/H] = –0.04 ± 0.05. These parameters, combined with the broadband spectral energy distribution (SED) and a parallax, allow us to infer a mass and radius of the host star of M_1 = 1.21 ± 0.08 M_☉ and R_1 = 1.09^(+0.15)_(–0.13) R_☉. The minimum mass of the inner companion is below the hydrogen-burning limit; however, the true mass is likely to be substantially higher. We are able to exclude transits of the inner companion with high confidence. Further, the host star spectrum exhibits a clear signature of Ca H and K core emission, indicating stellar activity, but a lack of photometric variability and small v sin I suggest that the primarys spin axis is oriented in a pole-on configuration. The rotational period of the primary estimated through an activity-rotation relation matches the orbital period of the inner companion to within 1.5 σ, suggesting that the primary and inner companion are tidally locked. If the inner companions orbital angular momentum vector is aligned with the stellar spin axis as expected through tidal evolution, then it has a stellar mass of ~0.3-0.4 M_☉. Direct imaging limits the existence of stellar companions to projected separations <30 AU. No set of spectral lines and no significant flux contribution to the SED from either companion are detected, which places individual upper mass limits of M_([2,3]) ≾ 1.0 M_☉, provided they are not stellar remnants. If the tertiary is not a stellar remnant, then it likely has a mass of ~0.5-0.6 M_☉, and its orbit is likely significantly inclined from that of the secondary, suggesting that the Kozai-Lidov mechanism may have driven the dynamical evolution of this system.
The Astronomical Journal | 2016
Jason D. Eastman; Thomas G. Beatty; Robert J. Siverd; Joseph M. O. Antognini; Matthew T. Penny; Erica J. Gonzales; Justin R. Crepp; Andrew W. Howard; Ryan L. Avril; Allyson Bieryla; Karen A. Collins; Benjamin J. Fulton; Jian Ge; Joao Gregorio; Bo Ma; Samuel N. Mellon; Thomas E. Oberst; Ji Wang; B. Scott Gaudi; Joshua Pepper; Keivan G. Stassun; Lars A. Buchhave; Eric L. N. Jensen; David W. Latham; Perry L. Berlind; Michael L. Calkins; Phillip A. Cargile; Knicole D. Colón; Saurav Dhital; Gilbert A. Esquerdo
We report the discovery of KELT-4Ab, an inflated, transiting Hot Jupiter orbiting the brightest component of a hierarchical triple stellar system. The host star is an F star with
The Astronomical Journal | 2013
Bo Ma; Jian Ge; Rory Barnes; Justin R. Crepp; Nathan De Lee; Letícia Dutra-Ferreira; Massimiliano Esposito; Bruno Femenía; Scott W. Fleming; B. Scott Gaudi; Luan Ghezzi; L. Hebb; Jonay I. González Hernández; Brian Leverett Lee; G. F. Porto de Mello; Keivan G. Stassun; Ji Wang; John P. Wisniewski; Eric Agol; Dmitry Bizyaev; Phillip A. Cargile; Liang Chang; Luiz Nicolaci da Costa; Jason D. Eastman; Bruce Gary; Peng Jiang; Stephen R. Kane; Rui Li; Jian Liu; Suvrath Mahadevan
T_{\rm eff}=6206\pm75
The Astronomical Journal | 2013
Peng Jiang; Jian Ge; Phillip A. Cargile; Justin R. Crepp; Nathan De Lee; Gustavo F. Porto de Mello; Massimiliano Esposito; Letícia D. Ferreira; Bruno Femenía; Scott W. Fleming; B. Scott Gaudi; Luan Ghezzi; Jonay I. González Hernández; L. Hebb; Brian Leverett Lee; Bo Ma; Keivan G. Stassun; Ji Wang; John P. Wisniewski; Eric Agol; Dmitry Bizyaev; Howard J. Brewington; Liang Chang; Luiz Nicolaci da Costa; Jason D. Eastman; Bruce Gary; Stephen R. Kane; Rui Li; Jian Liu; Suvrath Mahadevan
K,
Monthly Notices of the Royal Astronomical Society | 2017
Nolan Grieves; Jian Ge; Neil Thomas; Bo Ma; Sirinrat Sithajan; Luan Ghezzi; Benjamin Kimock; Kevin Willis; Nathan De Lee; Brian Leverett Lee; Scott W. Fleming; Eric Agol; Nicholas W. Troup; Martin Paegert; Donald P. Schneider; Keivan G. Stassun; Frank Varosi; Bo Zhao; Jian Liu; Rui Li; Gustavo F. Porto de Mello; Dmitry Bizyaev; Kaike Pan; Letícia D. Ferreira; Diego Lorenzo-Oliveira; B. Santiago; Luiz Nicolaci da Costa; Marcio A. G. Maia; R. Ogando; Eduardo F. del Peloso
\log g=4.108\pm0.014
The Astronomical Journal | 2015
Scott W. Fleming; Suvrath Mahadevan; Rohit Deshpande; Chad F. Bender; Ryan C. Terrien; Robert C. Marchwinski; Ji Wang; Arpita Roy; Keivan G. Stassun; Carlos Allende Prieto; Katia Cunha; Verne V. Smith; Eric Agol; Hasan Ak; Fabienne A. Bastien; Dmitry Bizyaev; Justin R. Crepp; Eric B. Ford; Peter M. Frinchaboy; D. A. García-Hernández; Ana G. Pérez; B. Scott Gaudi; Jian Ge; Frederick R. Hearty; Bo Ma; S. R. Majewski; Szabolcs Mészáros; David L. Nidever; Kaike Pan; Joshua Pepper
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Monthly Notices of the Royal Astronomical Society | 2018
Bo Ma; Jian Ge; Matthew W. Muterspaugh; Michael Singer; Gregory W. Henry; Jonay I. González Hernández; Sirinrat Sithajan; Sarik Jeram; Michael H. Williamson; Keivan G. Stassun; Benjamin Kimock; Frank Varosi; Sidney Schofield; Jian Liu; Scott Powell; Anthony Cassette; Hali Jakeman; Louis Avner; Nolan Grieves; Rory Barnes; Bo Zhao; Sankalp Gilda; Jim Grantham; Greg Stafford; David Savage; Steve Bland; Brent Ealey
\left[{\rm Fe}/{\rm H}\right]=-0.116_{-0.069}^{+0.065}
Monthly Notices of the Royal Astronomical Society | 2018
Nolan Grieves; Jian Ge; N Thomas; K Willis; Bo Ma; D Lorenzo-Oliveira; A. Queiroz; Luan Ghezzi; C. Chiappini; Friedrich Anders; L Dutra-Ferreira; G. F. Porto de Mello; B. Santiago; L. N. da Costa; R. Ogando; E. F. del Peloso; Jonathan C. Tan; Donald P. Schneider; Joshua Pepper; Keivan G. Stassun; Bihong Zhao; Dmitry Bizyaev; Kaike Pan
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