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[vsnet-j 1692] NY Vir

NY Vir

　Name List 見ている時は気付かなかったのですが、観測したらむちゃ面白そうな
　食連星です。

Paper: astro-ph/0111256
From: Mike Reed <mdr131f@smsu.edu>
Date: Wed, 14 Nov 2001 00:43:13 GMT   (129kb)

Title: Identifying modes in a pulsating sdB (EC14026) star
Authors: M.D. Reed, Whole Earth Telescope Xcov 17 team, Whole Earth Telescope Xcov 21 team
Comments: To appear in IAU 185 proceedings: "Radial and Nonradial Pulsations as
  Probes of Stellar Physics."
\\
  We present a preliminary analysis of time series photometry on the pulsating
subdwarf B star PG1336-018 acquired as part of two Whole Earth Telescope runs.
PG1336-018 is a multi-mode pulsator with at least 15 periods centered around
175 seconds. It is also an HW~Vir-type eclipsing binary with a period of 2.4
hours.
  Though over 20 pulsating subdwarf B stars have been discovered, only a few
have resolved temporal spectra and still fewer have identified pulsation modes.
We analyze features unique to the eclipsing binary system of PG1336-018 as a
means of identifying pulsation modes.
\\ ( http://arXiv.org/abs/astro-ph/0111256 ,  129kb)

---

　で、周期 2.4時間で 0.9等の食があり（眼視でも消えるように見えるだろうなぁ）、
　しかも 175s の脈動がある、という天体。

GSC4966.491 133848.15 -020149.4 (2000.0) 13.17 0
USNO0825.08090837 133848.146 -020149.14 (2000.0) 13.3 14.3
133847.8 -020146 (2000.0) PG1336-018 12.86 sdB
133847.9 -020159 (2000.0) SDB(Buscombe) V=13.45 B-V=-.21 -
133848.1 -020148 (2000.0) VIRNY EA+RPHS 13.30 14.22 V - - -