Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...390..431s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 390, no. 2, May 10, 1992, p. 431-439.
Astronomy and Astrophysics
Astronomy
39
Brown Dwarf Stars, Infrared Stars, Near Infrared Radiation, Open Clusters, Pleiades Cluster, Astronomical Photometry, Infrared Astronomy, Infrared Imagery, Stellar Mass
Scientific paper
Deep mosaic imaging of 200 arcmin-squared of the Pleiades was conducted at wavelengths of 0.9 micron (I band) and 2.2-micron (K band) in an effort to find free-floating low-mass cluster members. Control fields outside of the cluster, totalling 75 arcmin-squared, were also imaged to check the overall significance of the results. Photometry of all detected point sources led to the detection of 22 +/- 10 objects, when compared to the control data set, that lie near the lower Pleiades main sequence. These objects have theoretical masses in the range of about 0.1-0.04 solar mass, and are described by a power-law mass distribution with a slope of -2.8 +/- 0.5. If the detected objects are true cluster members, their combined mass would contribute significantly to that of the Pleiades.
Becklin Eric E.
Simons Doug A.
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