THE LUMINOSITY AND MASS FUNCTIONS OF LOW-MASS STARS IN THE GALACTIC DISK. II. THE FIELD
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 Data Release 6 photometry. The analysis incorporates ~15 million low-mass stars (0.1 M[subscript ʘ] < M < 0.8 M[subscript ʘ]), spread over 8400 de...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/93135 |
| _version_ | 1826193436344057856 |
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| author | Bochanski, John J. Hawley, Suzanne L. Covey, Kevin R. Reid, I. Neill Golimowski, David A. Ivezic, Zeljko West, A. A. |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Bochanski, John J. Hawley, Suzanne L. Covey, Kevin R. Reid, I. Neill Golimowski, David A. Ivezic, Zeljko West, A. A. |
| author_sort | Bochanski, John J. |
| collection | MIT |
| description | 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 Data Release 6 photometry. The analysis incorporates ~15 million low-mass stars (0.1 M[subscript ʘ] < M < 0.8 M[subscript ʘ]), spread over 8400 deg[superscript 2]. 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[subscript r] < 16. We compare the LF to previous studies and convert to an MF using the mass-luminosity relations of Delfosse et al. The system MF, measured over –1.0< log M/M[subscript ʘ] <–0.1, is well described by a lognormal distribution with M[subscript ο] = 0.25 M[subscript ʘ]. 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 theoretical star formation studies. |
| first_indexed | 2024-09-23T09:39:12Z |
| format | Article |
| id | mit-1721.1/93135 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:39:12Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/931352022-09-26T12:50:56Z THE LUMINOSITY AND MASS FUNCTIONS OF LOW-MASS STARS IN THE GALACTIC DISK. II. THE FIELD Bochanski, John J. Hawley, Suzanne L. Covey, Kevin R. Reid, I. Neill Golimowski, David A. Ivezic, Zeljko West, A. A. MIT Kavli Institute for Astrophysics and Space Research Bochanski, John J. West, Andrew A. 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 Data Release 6 photometry. The analysis incorporates ~15 million low-mass stars (0.1 M[subscript ʘ] < M < 0.8 M[subscript ʘ]), spread over 8400 deg[superscript 2]. 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[subscript r] < 16. We compare the LF to previous studies and convert to an MF using the mass-luminosity relations of Delfosse et al. The system MF, measured over –1.0< log M/M[subscript ʘ] <–0.1, is well described by a lognormal distribution with M[subscript ο] = 0.25 M[subscript ʘ]. 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 theoretical star formation studies. University of Washington. Astronomy Department National Science Foundation (U.S.) (Grant AST 02-05875) National Science Foundation (U.S.) (Grant AST 06-07644) National Aeronautics and Space Administration (ADP Grant NAG5-13111) 2015-01-22T17:43:03Z 2015-01-22T17:43:03Z 2010-05 2009-06 Article http://purl.org/eprint/type/JournalArticle 0004-6256 1538-3881 http://hdl.handle.net/1721.1/93135 Bochanski, John J., Suzanne L. Hawley, Kevin R. Covey, Andrew A. West, I. Neill Reid, David A. Golimowski, and Zeljko Ivezic. “THE LUMINOSITY AND MASS FUNCTIONS OF LOW-MASS STARS IN THE GALACTIC DISK. II. THE FIELD.” The Astronomical Journal 139, no. 6 (May 13, 2010): 2679–2699. © 2010 The American Astronomical Society en_US http://dx.doi.org/10.1088/0004-6256/139/6/2679 The Astronomical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing American Astronomical Society |
| spellingShingle | Bochanski, John J. Hawley, Suzanne L. Covey, Kevin R. Reid, I. Neill Golimowski, David A. Ivezic, Zeljko West, A. A. THE LUMINOSITY AND MASS FUNCTIONS OF LOW-MASS STARS IN THE GALACTIC DISK. II. THE FIELD |
| title | THE LUMINOSITY AND MASS FUNCTIONS OF LOW-MASS STARS IN THE GALACTIC DISK. II. THE FIELD |
| title_full | THE LUMINOSITY AND MASS FUNCTIONS OF LOW-MASS STARS IN THE GALACTIC DISK. II. THE FIELD |
| title_fullStr | THE LUMINOSITY AND MASS FUNCTIONS OF LOW-MASS STARS IN THE GALACTIC DISK. II. THE FIELD |
| title_full_unstemmed | THE LUMINOSITY AND MASS FUNCTIONS OF LOW-MASS STARS IN THE GALACTIC DISK. II. THE FIELD |
| title_short | THE LUMINOSITY AND MASS FUNCTIONS OF LOW-MASS STARS IN THE GALACTIC DISK. II. THE FIELD |
| title_sort | luminosity and mass functions of low mass stars in the galactic disk ii the field |
| url | http://hdl.handle.net/1721.1/93135 |
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