New Low-Mass Members of the Taurus Star-Forming Region

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dc.creatorLuhman, K. L.
dc.creatorBriceno, Cesar
dc.creatorStauffer, John R.
dc.creatorHartmann, Lee
dc.creatorNavascues, D. Barrado y
dc.creatorCaldwell, Nelson
dc.date2003-04-23
dc.date.accessioned2026-07-07T10:47:37Z
dc.date.available2026-07-07T10:47:37Z
dc.descriptionBriceno et al. recently used optical imaging, data from the Two-Micron All-Sky Survey (2MASS), and follow-up spectroscopy to search for young low-mass stars and brown dwarfs in 8 square degrees of the Taurus star-forming region. By the end of that study, there remained candidate members of Taurus that lacked the spectroscopic observations needed to measure spectral types and determine membership. In this work, we have obtained spectroscopy of the 22 candidates that have A_V<=8, from which we find six new Taurus members with spectral types of M2.75 through M9. The new M9 source has the second latest spectral type of the known members of Taurus (~0.02 M_sun). Its spectrum contains extremely strong emission in H_alpha (W~950 A) as well as emission in He I 6678 A and the Ca II IR triplet. This is the least massive object known to exhibit emission in He I and Ca II, which together with the strong H_alpha are suggestive of intense accretion.
dc.descriptionto be published in The Astrophysical Journal, 13 pages, 6 figures, also found at http://cfa-www.harvard.edu/sfgroup/preprints.html
dc.identifierhttps://arxiv.org/abs/astro-ph/0304414
dc.identifierhttp://arxiv.org/abs/astro-ph/0304414
dc.identifierAstrophys.J.590:348-356,2003
dc.identifierdoi:10.1086/374983
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183595
dc.subjectAstrophysics
dc.titleNew Low-Mass Members of the Taurus Star-Forming Region
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