Two-Micron All-Sky Survey J01542930+0053266: a new eclipsing M dwarf binary system
Identifieur interne : 000144 ( Main/Exploration ); précédent : 000143; suivant : 000145Two-Micron All-Sky Survey J01542930+0053266: a new eclipsing M dwarf binary system
Auteurs : A. C. Becker [États-Unis] ; E. Agol [États-Unis] ; N. M. Silvestri [États-Unis] ; J. J. Bochanski [États-Unis] ; C. Laws [États-Unis] ; A. A. West [États-Unis] ; G. Basri [États-Unis] ; V. Belokurov ; D. M. Bramich [Espagne] ; J. M. Carpenter [États-Unis] ; P. Challis [États-Unis] ; K. R. Covey [États-Unis] ; R. M. Cutri [États-Unis] ; N. W. Evans ; M. Fellhauer ; A. Garg [États-Unis] ; G. Gilmore ; P. Hewett ; P. Plavchan [États-Unis] ; D. P. Schneider [États-Unis] ; C. L. Slesnick [États-Unis] ; S. Vidrih [Allemagne] ; L. M. Walkowicz [États-Unis] ; D. B. ZuckerSource :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2008-05-01.
Abstract
We report on Two-Micron All-Sky Survey (2MASS) J01542930+0053266, a faint eclipsing system composed of two M dwarfs. The variability of this system was originally discovered during a pilot study of the 2MASS Calibration Point Source Working Data base. Additional photometry from the Sloan Digital Sky Survey yields an eight-passband light curve from which we derive an orbital period of 2.639 0157 ± 0.000 0016 d. Spectroscopic followup confirms our photometric classification of the system, which is likely composed of M0 and M1 dwarfs. Radial velocity measurements allow us to derive the masses (M1= 0.66 ± 0.03 M⊙; M2= 0.62 ± 0.03 M⊙) and radii (R1= 0.64 ± 0.08 R⊙; R2= 0.61 ± 0.09 R⊙) of the components, which are consistent with empirical mass–radius relationships for low-mass stars in binary systems. We perform Monte Carlo simulations of the light curves which allow us to uncover complicated degeneracies between the system parameters. Both stars show evidence of Hα emission, something not common in early-type M dwarfs. This suggests that binarity may influence the magnetic activity properties of low-mass stars; activity in the binary may persist long after the dynamos in their isolated counterparts have decayed, yielding a new potential foreground of flaring activity for next generation variability surveys.
Url:
DOI: 10.1111/j.1365-2966.2008.13040.x
Affiliations:
- Allemagne, Espagne, États-Unis
- Bade-Wurtemberg, District de Karlsruhe, Massachusetts, Pennsylvanie, Washington (État)
- Cambridge (Massachusetts), Heidelberg, Seattle, University Park (Pennsylvanie)
- Université Harvard, Université d'État de Pennsylvanie, Université de Washington
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Becker</name><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Astronomy, University of Washington, Seattle, WA 98195</wicri:regionArea><orgName type="university">Université de Washington</orgName><placeName><settlement type="city">Seattle</settlement><region type="state">Washington (État)</region></placeName></affiliation><affiliation wicri:level="1"><country wicri:rule="url">États-Unis</country></affiliation></author><author><name sortKey="Agol, E" sort="Agol, E" uniqKey="Agol E" first="E." last="Agol">E. 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West</name><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Astronomy, University of Washington, Seattle, WA 98195</wicri:regionArea><orgName type="university">Université de Washington</orgName><placeName><settlement type="city">Seattle</settlement><region type="state">Washington (État)</region></placeName></affiliation><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Astronomy, University of California, 601 Campbell Hall, Berkeley, CA 94720-3411</wicri:regionArea><wicri:noRegion>CA 94720-3411</wicri:noRegion></affiliation></author><author><name sortKey="Basri, G" sort="Basri, G" uniqKey="Basri G" first="G." last="Basri">G. 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Covey</name><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Physics, Harvard University, 17 Oxford Street, Cambridge, MA 02138</wicri:regionArea><orgName type="university">Université Harvard</orgName><placeName><settlement type="city">Cambridge (Massachusetts)</settlement><region type="state">Massachusetts</region></placeName></affiliation></author><author><name sortKey="Cutri, R M" sort="Cutri, R M" uniqKey="Cutri R" first="R. M." last="Cutri">R. M. Cutri</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Infrared Processing and Analysis Centre, M/C 100-22, 770 S. Wilson Ave, Caltech, Pasadena, CA 91125</wicri:regionArea><wicri:noRegion>CA 91125</wicri:noRegion></affiliation></author><author><name sortKey="Evans, N W" sort="Evans, N W" uniqKey="Evans N" first="N. W." last="Evans">N. W. 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Slesnick</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Astronomy, California Institute of Technology, Mail Code 105-24, 1200 East California Boulevard, Pasadena, CA 91125</wicri:regionArea><wicri:noRegion>CA 91125</wicri:noRegion></affiliation></author><author><name sortKey="Vidrih, S" sort="Vidrih, S" uniqKey="Vidrih S" first="S." last="Vidrih">S. Vidrih</name><affiliation></affiliation><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Astronomisches Rechen-Institut/Zentrum für Astronomie der Universität Heidelberg, Mönchhofstrasse 12-14, 69120 Heidelberg</wicri:regionArea><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Heidelberg</settlement></placeName></affiliation></author><author><name sortKey="Walkowicz, L M" sort="Walkowicz, L M" uniqKey="Walkowicz L" first="L. M." last="Walkowicz">L. M. Walkowicz</name><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Astronomy, University of Washington, Seattle, WA 98195</wicri:regionArea><orgName type="university">Université de Washington</orgName><placeName><settlement type="city">Seattle</settlement><region type="state">Washington (État)</region></placeName></affiliation></author><author><name sortKey="Zucker, D B" sort="Zucker, D B" uniqKey="Zucker D" first="D. B." last="Zucker">D. B. Zucker</name><affiliation><wicri:noCountry code="subField">0HA</wicri:noCountry></affiliation></author></analytic><monogr></monogr><series><title level="j">Monthly Notices of the Royal Astronomical Society</title><title level="j" type="abbrev">Monthly Notices of the Royal Astronomical Society</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2008-05-01">2008-05-01</date><biblScope unit="volume">386</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="416">416</biblScope><biblScope unit="page" to="424">424</biblScope></imprint><idno type="ISSN">0035-8711</idno></series><idno type="istex">AD59A05A871082F6A543B6B614023D666B3DEBD9</idno><idno type="DOI">10.1111/j.1365-2966.2008.13040.x</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">We report on Two-Micron All-Sky Survey (2MASS) J01542930+0053266, a faint eclipsing system composed of two M dwarfs. The variability of this system was originally discovered during a pilot study of the 2MASS Calibration Point Source Working Data base. Additional photometry from the Sloan Digital Sky Survey yields an eight-passband light curve from which we derive an orbital period of 2.639 0157 ± 0.000 0016 d. Spectroscopic followup confirms our photometric classification of the system, which is likely composed of M0 and M1 dwarfs. Radial velocity measurements allow us to derive the masses (M1= 0.66 ± 0.03 M⊙; M2= 0.62 ± 0.03 M⊙) and radii (R1= 0.64 ± 0.08 R⊙; R2= 0.61 ± 0.09 R⊙) of the components, which are consistent with empirical mass–radius relationships for low-mass stars in binary systems. We perform Monte Carlo simulations of the light curves which allow us to uncover complicated degeneracies between the system parameters. Both stars show evidence of Hα emission, something not common in early-type M dwarfs. This suggests that binarity may influence the magnetic activity properties of low-mass stars; activity in the binary may persist long after the dynamos in their isolated counterparts have decayed, yielding a new potential foreground of flaring activity for next generation variability surveys.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Espagne</li><li>États-Unis</li></country><region><li>Bade-Wurtemberg</li><li>District de Karlsruhe</li><li>Massachusetts</li><li>Pennsylvanie</li><li>Washington (État)</li></region><settlement><li>Cambridge (Massachusetts)</li><li>Heidelberg</li><li>Seattle</li><li>University Park (Pennsylvanie)</li></settlement><orgName><li>Université Harvard</li><li>Université d'État de Pennsylvanie</li><li>Université de Washington</li></orgName></list><tree><noCountry><name sortKey="Belokurov, V" sort="Belokurov, V" uniqKey="Belokurov V" first="V." last="Belokurov">V. Belokurov</name><name sortKey="Evans, N W" sort="Evans, N W" uniqKey="Evans N" first="N. W." last="Evans">N. W. Evans</name><name sortKey="Fellhauer, M" sort="Fellhauer, M" uniqKey="Fellhauer M" first="M." last="Fellhauer">M. Fellhauer</name><name sortKey="Gilmore, G" sort="Gilmore, G" uniqKey="Gilmore G" first="G." last="Gilmore">G. Gilmore</name><name sortKey="Hewett, P" sort="Hewett, P" uniqKey="Hewett P" first="P." last="Hewett">P. Hewett</name><name sortKey="Zucker, D B" sort="Zucker, D B" uniqKey="Zucker D" first="D. B." last="Zucker">D. B. Zucker</name></noCountry><country name="États-Unis"><region name="Washington (État)"><name sortKey="Becker, A C" sort="Becker, A C" uniqKey="Becker A" first="A. C." last="Becker">A. C. Becker</name></region><name sortKey="Agol, E" sort="Agol, E" uniqKey="Agol E" first="E." last="Agol">E. Agol</name><name sortKey="Basri, G" sort="Basri, G" uniqKey="Basri G" first="G." last="Basri">G. Basri</name><name sortKey="Becker, A C" sort="Becker, A C" uniqKey="Becker A" first="A. C." last="Becker">A. C. Becker</name><name sortKey="Bochanski, J J" sort="Bochanski, J J" uniqKey="Bochanski J" first="J. J." last="Bochanski">J. J. Bochanski</name><name sortKey="Carpenter, J M" sort="Carpenter, J M" uniqKey="Carpenter J" first="J. M." last="Carpenter">J. M. Carpenter</name><name sortKey="Challis, P" sort="Challis, P" uniqKey="Challis P" first="P." last="Challis">P. Challis</name><name sortKey="Covey, K R" sort="Covey, K R" uniqKey="Covey K" first="K. R." last="Covey">K. R. Covey</name><name sortKey="Cutri, R M" sort="Cutri, R M" uniqKey="Cutri R" first="R. M." last="Cutri">R. M. Cutri</name><name sortKey="Garg, A" sort="Garg, A" uniqKey="Garg A" first="A." last="Garg">A. Garg</name><name sortKey="Laws, C" sort="Laws, C" uniqKey="Laws C" first="C." last="Laws">C. Laws</name><name sortKey="Plavchan, P" sort="Plavchan, P" uniqKey="Plavchan P" first="P." last="Plavchan">P. Plavchan</name><name sortKey="Schneider, D P" sort="Schneider, D P" uniqKey="Schneider D" first="D. P." last="Schneider">D. P. Schneider</name><name sortKey="Silvestri, N M" sort="Silvestri, N M" uniqKey="Silvestri N" first="N. M." last="Silvestri">N. M. Silvestri</name><name sortKey="Slesnick, C L" sort="Slesnick, C L" uniqKey="Slesnick C" first="C. L." last="Slesnick">C. L. Slesnick</name><name sortKey="Walkowicz, L M" sort="Walkowicz, L M" uniqKey="Walkowicz L" first="L. M." last="Walkowicz">L. M. Walkowicz</name><name sortKey="West, A A" sort="West, A A" uniqKey="West A" first="A. A." last="West">A. A. West</name><name sortKey="West, A A" sort="West, A A" uniqKey="West A" first="A. A." last="West">A. A. West</name></country><country name="Espagne"><noRegion><name sortKey="Bramich, D M" sort="Bramich, D M" uniqKey="Bramich D" first="D. M." last="Bramich">D. M. Bramich</name></noRegion></country><country name="Allemagne"><region name="Bade-Wurtemberg"><name sortKey="Vidrih, S" sort="Vidrih, S" uniqKey="Vidrih S" first="S." last="Vidrih">S. Vidrih</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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