The Luminosity and Mass Functions of Low-Mass Stars in the Galactic Disk: II. The Field
John J. Bochanski,Suzanne L. Hawley,Kevin R. Covey,Andrew A. West,I. Neill Reid,David A. Golimowski,Zeljko Ivezic +6 more
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In this paper, the luminosity function (LF) and mass function (MF) of field low-mass dwarfs derived from Sloan Digital Sky Survey (SDSS) Data Release 6 (DR6) photometry were analyzed.Abstract:
We report on new measurements of the luminosity function (LF) and mass function (MF) of field low-mass dwarfs derived from Sloan Digital Sky Survey (SDSS) Data Release 6 (DR6) photometry. The analysis incorporates ~15 million low-mass stars (0.1 Msun < M < 0.8 Msun), spread over 8,400 square degrees. Stellar distances are estimated using new photometric parallax relations, constructed from ugriz photometry of nearby low-mass stars with trigonometric parallaxes. We use a technique that simultaneously measures Galactic structure and the stellar LF from 7 < M_r < 16. We compare the LF to previous studies and convert to a MF using the mass-luminosity relations of Delfosse et al., 2000. The system MF, measured over -1.0 < log M/Msun < -0.1, is well-described by a log-normal distribution with Mo = 0.25 Msun. We stress that our results should not be extrapolated to other mass regimes. Our work generally agrees with prior low-mass stellar MFs and places strong constraints on future star-formation studies of the Milky Way.read more
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Stellar Multiplicity
Gaspard Duchêne,Adam L. Kraus +1 more
TL;DR: In this article, the authors summarize the current empirical knowledge of stellar multiplicity for Main Sequence stars and brown dwarfs, as well as among populations of Pre-Main Sequence stars, and embedded protostars.
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The transiting exoplanet survey satellite: simulations of planet detections and astrophysical false positives
Peter Sullivan,Peter Sullivan,Joshua N. Winn,Joshua N. Winn,Zachory K. Berta-Thompson,David Charbonneau,Drake Deming,Courtney D. Dressing,David W. Latham,Alan M. Levine,Peter R. McCullough,Peter R. McCullough,Timothy D. Morton,George R. Ricker,Roland Vanderspek,Deborah F. Woods +15 more
TL;DR: The Transiting Exoplanet Survey Satellite (TESS) is a NASA-sponsored Explorer mission that will perform a wide-field survey for planets that transit bright host stars as discussed by the authors.
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The sloan digital sky survey data release 7 spectroscopic m dwarf catalog. i. data
Andrew A. West,Andrew A. West,Dylan P. Morgan,John J. Bochanski,John J. Bochanski,J. M. Andersen,Keaton J. Bell,Adam F. Kowalski,James R. A. Davenport,Suzanne L. Hawley,Sarah J. Schmidt,David Bernat,Eric J. Hilton,Philip S. Muirhead,Kevin R. Covey,Kevin R. Covey,Bárbara Rojas-Ayala,Everett Schlawin,Mary Gooding,Kyle Schluns,Saurav Dhital,J. Sebastian Pineda,David O. Jones +22 more
TL;DR: In this paper, a spectroscopic catalog of 70,841 visually inspected M dwarfs from the seventh data release of the Sloan Digital Sky Survey is presented, which is cross-matched to Two Micron All Sky Survey infrared data, and contains photometric distances for each star.
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The big problems in star formation: The star formation rate, stellar clustering, and the initial mass function
TL;DR: A review of the current state of the field of star formation can be found in this article, focusing on three central questions: What controls the rate at which gas in a galaxy converts to stars? What determines how those stars are clustered, and what fraction of the stellar population ends up in gravitationally-bound structures?
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