The Discovery of Two Nearby Carbon Dwarfs

February 2003 • 2003ApJ...584L..95L

Authors • Lowrance, Patrick J. • Kirkpatrick, J. Davy • Reid, I. Neill • Cruz, Kelle L. • Liebert, James

Abstract • The comparison of optical and Two Micron All Sky Survey near-infrared photometry for large samples of cataloged proper-motion stars has given us the potential to discover previously unrecognized nearby objects of rare type. In this Letter we present the discovery of two new carbon dwarfs, LSR 2105+2514 and LP 758-43, which were drawn from proper-motion lists and which lie in a sparsely populated part of optical/near-IR color-color space. Their optical spectra, exhibiting absorptions by C₂ and/or CN, are discussed. LSR 2105+2514 is believed to lie within 200 pc and would have M_Ks>=6.7, making it lower in luminosity than any carbon dwarf with a measured trigonometric parallax. LP 758-43, which is not as red but still probably cooler than the best studied carbon dwarfs, is believed to lie within 360 pc. Using our optical/near-infrared selection technique on published lists of proper-motion stars, we hope in the near future to expand further the current sample of carbon dwarfs, which numbers only 31 objects at this writing.

Links

• PREPRINT http://arxiv.org/abs/astro-ph/0301376
• SPIRES http://inspirehep.net/search?p=find+j+ASJOA,584,L95
• ELECTR https://doi.org/10.1086%2F373986
• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2003ApJ...584L..95L
• PDF https://iopscience.iop.org/article/10.1086/373986/pdf
• DATA https://irsa.ipac.caltech.edu/bibdata/2003/L/2003ApJ...584L..95L.html
• SPIRES http://inspirehep.net/search?p=find+eprint+astro-ph/0301376