Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005newa...11...59d&link_type=abstract
New Astronomy, Volume 11, Issue 1, p. 59-67.
Astronomy and Astrophysics
Astronomy
1
97.20.Rp, 97.10.-Q, 97.10.Wn, 95.85.-E, 95.85.Jq
Scientific paper
We report the identification of one nearby cool white dwarf candidate in Gemini. The object is called PSS 309-6 or 2MASS 06562998+3002455 and its identification came as a result of a search in SIMBAD at CDS. With uncorrected colors B - V = 1.52 ± 0.23, V - J = 2.61 ± 0.12, V - H = 2.82 ± 0.15, V - KS = 3.37 ± 0.15, J - H = 0.21 ± 0.15, H - KS = 0.55 ± 0.17, J - KS = 0.76 ± 0.13, it exhibits a proper motion of 131-2+3mas/yr. The photometric properties of this object appear to be consistent with those obtained in cool, helium-rich atmosphere white dwarf numerical models. If our interpretation is correct, the object may be a cool white dwarf of the Galactic old thin disk population with a temperature of about 4000 K, mass likely below 0.6M&sun; and a rough distance estimate of 17 43 pc with a heliocentric space velocity of (U, V, W) = (2.3, -27.7, -2.9) ± (1.0, 12.0, 1.3) km/s.
de la Fuente Marcos Carlos
de la Fuente Marcos Raúl
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