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Astron. Astrophys. 338, 127-131 (1998)

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Discovery of three very distant M and L dwarfs

C. Wolf 1, R. Mundt 1, D. Thompson 1, F. Chaffee 2, S.V.W. Beckwith 1, R. Fockenbrock 1, J. Fried 1, H. Hippelein 1, J.-S. Huang 1, B. von Kuhlmann 1, C. Leinert 1, K. Meisenheimer 1, S. Phleps 1, H.-J. Röser 1 and E. Thommes 3

1 Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
2 W.M. Keck Observatory, 65-1120 Mamalahoa Highway, Kamuela, Hawaii 96743, USA
3 Royal Observatory, Blackfort Hill, Edinburgh EH9 3HJ, UK

Received 11 May 1998 / Accepted 20 July 1998


We report the serendipitous discovery of three very cool distant late type dwarfs. These low-mass stars were found in the 9h- and 16h-fields of the Calar Alto Deep Imaging Survey (CADIS) and named CA09-LMS1, CA16-LMS1 and CA16-LMS2. CA16-LMS1 is the latest object and has a spectral type of [FORMULA]M10 (L1 in the new spectral class L). The other two stars have spectral types of about M9 (CA16-LMS2) and M6.5 (CA09-LMS1). We derive distances of [FORMULA] pc for CA09-LMS1, [FORMULA] pc for CA16-LMS1, and [FORMULA] pc for CA16-LMS2. The first two of these three objects are probably the most distant late-type M dwarfs for which optical spectra have been obtained.

Key words: stars: individual: CA09-LMS1 (J0913.5+4611); CA16-LMS1 (J1625.0+5544); CA16-LMS2 (J1623.9+5546) – stars: low-mass, brown dwarfs

SIMBAD Objects


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© European Southern Observatory (ESO) 1998

Online publication: September 8, 1998