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Astrophysics

Title: Nearby candidate dust-disk pre-main-sequence solar-mass stars

Authors: A.A. Suchkov
Abstract: I have isolated a population of numerous F stars that appear to be pre-main-sequence (PMS). The candidate PMS stars have been identified using CM diagram, reddening, flux excess in the UV and near-infrared, and luminosity anomaly. Negative luminosity anomaly and excessive UV flux for many of these stars is suggestive of accretion disks, while the NIR excess is indicative in many cases of the presence of dust disk thermal emission.
Observed overluminosity of many PMS candidates is consistent with their pre-main-sequence status. The bulk of the PMS candidates is located within
200 pc, exhibiting strong association with regions of star formation that are numerous between ~130 to 180 pc. The number of PMS candidates plummets redward of the spectral type ~ F5. This effect may provide important clues for understanding the evolution of PMS stars in the solar-mass range.
Comments: 4 pages, 6 figures, STScI Symposium 2002 "Astrophysics of Life"
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0210578v1

Submission history

From: Anatoly A. Suchkov [view email]
[v1] Fri, 25 Oct 2002 21:08:42 GMT (133kb)