Discovery of the lowest mass brown dwarf in the Pleiades

Details Discovery of the lowest mass brown dwarf in the Pleiades Discovery of the lowest mass brown dwarf in the Pleiades

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.288l..23c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 288, Issue 1, pp. L23-L27.

Astronomy and Astrophysics

Astronomy

26

Stars: Low Mass, Brown Dwarfs, Open Clusters And Associations: Individual: Pleiades

Scientific paper

We have imaged the Pleiades open cluster at I and Z in a search for low-mass stars and brown dwarfs. One very red object, which we have called PIZ 1, at I=19.64, I-Z=1.33 has been detected within an area of 100 arcmin^2. Follow-up infrared photometry verifies that this object is extremely red with a K magnitude of 15.5. We have also obtained a spectrum which exhibits the spectral features indicative of an extremely cool M dwarf. We estimate the effective temperature and mass of PIZ 1 to be 2300 K and 0.048 Msolar, respectively.

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