2014ApJ...795...82S


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.31CET10:58:33

2014ApJ...795...82S - Astrophys. J., 795, 82 (2014/November-1)

The Hα profiles of Be shell stars.

SILAJ J., JONES C.E., SIGUT T.A.A. and TYCNER C.

Abstract (from CDS):

A new set of theoretical Hα emission line profiles of Be stars has been computed using the code BERAY, which solves the transfer equation along a series of rays passing through the star+disk system, representing an improved treatment over earlier work done by the authors. The new profiles were compared with the previous work, and general trends (such as line profile shapes and correlations between line equivalent widths as a function of initial density ρ0 and power law index n) were recovered. Additionally, BERAY was employed to model the spectra of eight well-known Be shell stars. Some degeneracy was found in the choice of model parameters, highlighting the need to employ alternate observables to constrain the models. However, the inclination angle of the model seemed relatively insensitive to the choices of other parameters, and we show that, with our models, only a very small range of inclination angles can adequately reproduce the observations. Five of our eight targets were found to have inclination angles of 70° or higher, and two more were found to have inclination angles of 67° and 65°. The observation of one target–4 Aquilae–could only be reproduced by models created at an inclination angle of approximately 45°.

Abstract Copyright:

Journal keyword(s): circumstellar matter - line: profiles - stars: emission-line, Be

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * gam Cas Be* 00 56 42.5317 +60 43 00.265 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1141 2
2 * phi Per Be* 01 43 39.6379209 +50 41 19.432832 3.10 4.02 4.06 3.90 3.88 B1.5V:e-shell 535 0
3 HD 14434 Em* 02 21 52.4122106464 +56 54 18.032877629 7.87 8.65 8.49 8.29 8.20 O5.5Vnn((f))p 170 0
4 * 28 Tau Be* 03 49 11.2175463444 +24 08 12.172181348 4.73 5.01 5.09   5.08 B8Vne 436 0
5 * eps Aur Al* 05 01 58.1290610816 +43 49 23.871349520 3.86 3.53 2.99 2.47 2.02 A9Ia 558 0
6 HD 45512 PM* 06 28 18.8131373173 +10 18 14.020624110   7.328 6.155     K2III-IV 28 0
7 * nu. Gem Be* 06 28 57.7861342 +20 12 43.685624 3.51 4.00 4.14 4.17 4.28 B6IVe 238 0
8 * 4 Her Be* 15 55 30.5918031179 +42 33 58.287739693 5.23 5.64 5.75   5.82 B9pe 169 0
9 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 697 0
10 * c Oph Be* 17 31 24.9541340 -23 57 45.513592 4.75 4.81 4.81 4.74 4.72 A0V 256 0
11 * z Her Be* 17 50 03.3350227341 +48 23 38.946882803 6.380 6.790 6.890     B6IIInp_sh 150 0
12 * 4 Aql Be* 18 44 49.9381980 +02 03 36.136039   4.948 5.005     B9V 92 0
13 * 1 Del ** 20 30 17.96064 +10 53 45.3233 5.94 6.05 6.08     A1:III 103 0
14 * 60 Cyg Be* 21 01 10.9277825432 +46 09 20.792180714 4.23 5.226 5.432     B1Ve 180 0
15 * eps Cap Be* 21 37 04.8306787 -19 27 57.646354 3.69 4.35 4.55 4.60 4.74 B3V 241 0

    Equat.    Gal    SGal    Ecl

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2020.10.31-10:58:33

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