J/PAZh/32/662 Photometric Variability of HD 51585 (Arkhipova+, 2006)
Spectroscopic and Photometric Variability of HD 51585 As a Manifestation
of Stellar Wind.
Arkhipova V.P., Ikonnikova N.P., Komissarova G.V., Esipov V.F.
<Pis'ma Astron. Zh. 32, 662 (2006)>
=2006PAZh...32..662A 2006PAZh...32..662A
=2006AstL...32..594A 2006AstL...32..594A
ADC_Keywords: Stars, Be; Spectroscopy; Photometry, UBV
Abstract:
Photoelectric observations of HD 51585 (OY Gem), a B[e] star with an
infrared excess and a candidate for protoplanetary nebulae, obtained
with a 60-cm telescope at the Crimean Station of the Sternberg
Astronomical Institute in 1992-2005 are presented. The star exhibited
rapid irregular brightness variations with amplitudes from 0.1mag in
the V band to 0.2mag in the U band within the observing season as
well as slow systematic variations with amplitudes from 0.3mag in the
V band to 0.65mag in the U band and with a quasi-period of ∼2800days.
The B-V color index varied within 0.1mag and did not follow the slow
systematic brightness variations, while U-B correlated with the U
brightness and varied between 0.7mag at maximum light and 0.35mag at
minimum light. Our low-resolution spectroscopy performed in 1994-2005
has revealed significant variability of the Balmer and Paschen
hydrogen emission lines as well as the He I and OI lines. Equivalent
widths are given for the HI, He I, OI, and Fe II lines; a correlation
has been found between the star's photometric variability and the
hydrogen line intensities. Our joint analysis of the photometric and
spectroscopic data suggests that variations in a strong stellar wind
are responsible for the variability of the star.
Objects:
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RA (2000) DE Designation(s)
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06 58 30.3 +16 19 25 HD 51585 = V* OY Gem = EM* MWC 162
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 41 113 UBV observations of HD 51585
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See also:
J/A+AS/117/281 : Spectroscopy of HD 51585 (= OY Gem) (Jaschek+, 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 I7 d JD Julian date
9- 14 F6.3 mag Vmag V magnitude
16- 21 F6.3 mag Bmag B magnitude
23- 28 F6.3 mag Umag U magnitude
30- 34 F5.3 mag B-V B-V color index
36- 41 F6.3 mag U-B U-B color index
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(End) Veta Avedisova (INASAN) 20-Feb-2007