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dc.contributor.authorBlake, Cullen H.
dc.contributor.authorCharbonneau, David
dc.contributor.authorWhite, Russel J.
dc.contributor.authorMarley, Mark S.
dc.contributor.authorSaumon, Didier
dc.date.accessioned2019-09-24T17:25:17Z
dc.date.issued2007
dc.identifier.citationBlake, Cullen H., David Charbonneau, Russel J. White, Mark S. Marley, and Didier Saumon. 2007. “Multiepoch Radial Velocity Observations of L Dwarfs.” The Astrophysical Journal 666 (2): 1198–1204. https://doi.org/10.1086/520124.
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41397418*
dc.description.abstractWe report on the development of a technique for precise radial velocity measurements of cool stars and brown dwarfs in the near infrared. Our technique is analogous to the iodine (I-2) absorption cell method that has proven so successful in the optical regime. We rely on telluric CH4 absorption features to serve as a wavelength reference, relative to which we measure Doppler shifts of the CO and H2O features in the spectra of our targets. We apply this technique to high-resolution (R approximate to 50; 000) spectra near 2.3 mu m of nine L dwarfs taken with the Phoenix instrument on Gemini South and demonstrate a typical precision of 300 m s(-1). We conduct simulations to estimate our expected precision and show that our performance is currently limited by the signal-to-noise ratio (S/N) of our data. We present estimates of the rotational velocities and systemic velocities of our targets. With our current data we are sensitive to companions with M sin i > 2 M-J in orbits with periods less than 3 days. We identify no companions in our current data set. Future observations with improved S/N should result in radial velocity precision of 100 m s(-1) for L dwarfs.
dc.language.isoen_US
dc.publisherAmerican Astronomical Society
dash.licenseLAA
dc.titleMultiepoch Radial Velocity Observations of L Dwarfs
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalThe Astrophysical Journal
dash.depositing.authorCharbonneau, David::a0e3ca75d3fb8511f2f554ed69428108::600
dc.date.available2019-09-24T17:25:17Z
dash.workflow.comments1Science Serial ID 97601
dc.identifier.doi10.1086/520124
dash.source.volume666;2
dash.source.page1198-1204


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