[vsnet-j 2474] SO025300.5+165258

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

SO025300.5+165258

　バーナード星に次いで近い星が見つかったそうです。頑張れば見えるかも。

＃これぐらい固有運動が大きいと、新天体としてひっかかってもおかしくないですね。

Paper: astro-ph/0302206
From: Bonnard Teegarden <bonnard@milkyway.gsfc.nasa.gov>
Date: Tue, 11 Feb 2003 18:26:01 GMT   (139kb)

Title: Discovery of a New Nearby Star
Authors: B. J. Teegarden, S. H. Pravdo, M. Hicks, S. B. Shaklan, K. Covey, O.
  Fraser, S. L. Hawley, T. McGlynn, I. N. Reid
Comments: 5 pages, 3 figures. Submitted to ApJ Letters
\\
  We report the discovery of a nearby star with a very large proper motion of
5.06 +/- 0.03 arcsec/yr. The star is called SO025300.5+165258 and referred to
herein as HPMS (high proper motion star). The discovery came as a result of a
search of the SkyMorph database, a sensitive and persistent survey that is well
suited for finding stars with high proper motions. There are currently only 7
known stars with proper motions > 5 arcsec/yr. We have determined a preliminary
value for the parallax of 0.43 +/- 0.13 arcsec. If this value holds our new
star ranks behind only the Alpha Centauri system (including Proxima Centauri)
and Barnard's star in the list of our nearest stellar neighbors. The spectrum
and measured tangential velocity indicate that HPMS is a main-sequence star
with spectral type M6.5. However, if our distance measurement is correct, the
HPMS is underluminous by 1.2 +/- 0.7 mag.
\\ ( http://arXiv.org/abs/astro-ph/0302206 ,  139kb)

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