Absolute Properties of the Low-Mass Eclipsing Binary CM Draconis

DSpace/Manakin Repository

Absolute Properties of the Low-Mass Eclipsing Binary CM Draconis

Show simple item record

dc.contributor.author Morales, Juan Carlos
dc.contributor.author Ribas, Ignasi
dc.contributor.author Jordi, Carme
dc.contributor.author Torres, Guillermo
dc.contributor.author Gallardo, Jose
dc.contributor.author Guinan, Edward F.
dc.contributor.author Charbonneau, David
dc.contributor.author Wolf, Marek
dc.contributor.author Latham, David W.
dc.contributor.author Anglada-Escude, Guillem
dc.contributor.author Bradstreet, David H.
dc.contributor.author Everett, Mark E.
dc.contributor.author O'Donovan, Francis T.
dc.contributor.author Mandushev, Georgi
dc.contributor.author Mathieu, Robert D.
dc.date.accessioned 2010-08-12T13:42:32Z
dc.date.issued 2009
dc.identifier.citation Morales, Juan Carlos, Ignasi Ribas, Carme Jordi, Guillermo Torres, Jose Gallardo, Edward F. Guinan, David Charbonneau, et al. 2009. Absolute properties of the low-mass eclipsing binary CM Draconis. Astrophysical Journal 691(2): 1400-1411. en_US
dc.identifier.issn 0004-637X en_US
dc.identifier.issn 1538-4357 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:4341698
dc.description.abstract Spectroscopic and eclipsing binary systems offer the best means for determining accurate physical properties of stars, including their masses and radii. The data available for low-mass stars have yielded firm evidence that stellar structure models predict smaller radii and higher effective temperatures than observed, but the number of systems with detailed analyses is still small. In this paper, we present a complete reanalysis of one of such eclipsing systems, CM Dra, composed of two dM4.5 stars. New and existing light curves as well as a radial velocity curve are modeled to measure the physical properties of both components. The masses and radii determined for the components of CM Dra are M 1 = 0.2310 ± 0.0009 M sun, M 2 = 0.2141 ± 0.0010M sun, R 1 = 0.2534 ± 0.0019 R sun, and R 2 = 0.2396 ± 0.0015 R sun. With relative uncertainties well below the 1% level, these values constitute the most accurate properties to date for fully convective stars. This makes CM Dra a valuable benchmark for testing theoretical models. In comparing our measurements with theory, we confirm the discrepancies previously reported for other low-mass eclipsing binaries. These discrepancies seem likely to be due to the effects of magnetic activity. We find that the orbit of this system is slightly eccentric, and we have made use of eclipse timings spanning three decades to infer the apsidal motion and other related properties. en_US
dc.description.sponsorship Astronomy en_US
dc.language.iso en_US en_US
dc.publisher Institute of Physics en_US
dc.relation.isversionof doi:10.1088/0004-637X/691/2/1400 en_US
dash.license OAP
dc.subject binaries: eclipsing en_US
dc.subject binaries: spectroscopic en_US
dc.subject stars: late-type en_US
dc.subject stars: fundamental parameters en_US
dc.subject stars: individual (CM Dra) en_US
dc.title Absolute Properties of the Low-Mass Eclipsing Binary CM Draconis en_US
dc.type Journal Article en_US
dc.description.version Accepted Manuscript en_US
dc.relation.journal Astrophysical Journal en_US
dash.depositing.author Charbonneau, David
dc.date.available 2010-08-12T13:42:32Z

Files in this item

Files Size Format View
Charbonneau_PropertiesDraconis.pdf 763.4Kb PDF View/Open

This item appears in the following Collection(s)

  • FAS Scholarly Articles [7501]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

Show simple item record

 
 

Search DASH


Advanced Search
 
 

Submitters