1996A&A...308..852Z

Query : 1996A&A...308..852Z

1996A&A...308..852Z - Astronomy and Astrophysics, volume 308, 852-862 (1996/4-3)

High-resolution spectroscopy of 31 Pegasi. The Hγ and He I 4471 line variations.

ZOREC J., ISRAELIAN G., BALLEREAU D. and CHAUVILLE J.

Abstract (from CDS):

We present high-resolution He I 4471, Mg II 4481 and Hγ line profiles of the Be star 31 Peg obtained simultaneously at four observing dates. In this paper we focus on the He I 4471 line and on the absorption wings of the Hγ line which showed important variations. Models of static stellar atmospheres were calculated to determine the photospheric parameters of the underlying star. However, non-static and out of radiative equilibrium models are needed to better understand the structure of the atmosphere of 31 Peg and the characteristics of the observed He I 4471 and Hγ lines. The implication of deep atmospheric layers in the mass-loss phenomena of Be stars is suggested.

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Journal keyword(s): stars: individual: 31 Peg - stars: emission-line, Be - lines: profiles

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 * gam Cas HXB 00 56 42.5310945 +60 43 00.264089 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1209 0
2 V* X Per HXB 03 55 23.0777456088 +31 02 45.039836148 6.090 6.840 6.720     O9.5III 978 0
3 * mu. Cen Be* 13 49 36.9886872492 -42 28 25.440271450 2.37 3.27 3.43 3.41 3.50 B2Vnpe 434 0
4 * f01 Cyg Be* 20 59 49.5541247496 +47 31 15.363746436 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 502 0
5 * 31 Peg Be* 22 21 31.0751048 +12 12 18.662815 4.08 4.89 4.99 5.06 5.20 B3III 220 0

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