J/MNRAS/474/5287 BeSOS Be stars stellar parameters (Arcos+, 2018)
Stellar parameters and Hα line profile variability of Be stars in the
BeSOS survey.
Arcos C., Kanaan S., Chavez J., Vanzi L., Araya I., Cure M.
<Mon. Not. R. Astron. Soc., 474, 5287-5299 (2018)>
=2018MNRAS.474.5287A 2018MNRAS.474.5287A (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Stars, Be ; Effective temperatures ; Stars, distances ;
Rotational velocities ; MK spectral classification
Keywords: techniques: spectroscopic - surveys - stars: emission-line, Be
Abstract:
The Be phenomenon is present in about 20 per cent of B-type stars.
Be stars show variability on a broad range of time-scales, which in
most cases is related to the presence of a circumstellar disc of
variable size and structure. For this reason, a time-resolved survey
is highly desirable in order to understand the mechanisms of disc
formation, which are still poorly understood. In addition, a complete
observational sample would improve the statistical significance of the
study of stellar and disc parameters. The 'Be Stars Observation
Survey' (BeSOS) is a survey containing reduced spectra obtained
using the Pontifica Universidad Catolica High Echelle Resolution
Optical Spectrograph (PUCHEROS) with a spectral resolution of 17000
in the range 4260-7300Å. BeSOS's main objective is to offer
consistent spectroscopic and time-resolved data obtained with one
instrument. The user can download or plot the data and obtain stellar
parameters directly from the website. We also provide a star-by-star
analysis based on photometric, spectroscopic and interferometric data,
as well as general information about the whole BeSOS sample. Recently,
BeSOS led to the discovery of a new Be star HD 42167 and facilitated
study of the V/R variation of HD 35165 and HD 120324, the steady disc
of HD 110335 and the Be shell status of HD 127972. Optical spectra
used in this work, as well as the stellar parameters derived, are
available online at http://besos.ifa.uv.cl.
Description:
The observations were carried out using the spectrograph Pontifica
Universidad Catolica High Echelle Resolution Optical Spectrograph
(PUCHEROS), developed at the Center of Astro-Engineering of Pontifica
Universidad Catolica (PUC).
BeSOS observations started in 2012 November. Our programme stars come
from a large list of confirmed southern Be stars taken from the Be
Star Spectra (BeSS) data base (Neiner et al., 2011AJ....142..149N 2011AJ....142..149N,
http://basebe.obspm.fr) and also a list of B stars showing IR excess
taken from the Set of Identifications, Measurements, and Bibliography
for Astronomical Data (SIMBAD) data base.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 106 70 Stellar parameters derived by photometric and
spectroscopic analysis
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Target name
10- 11 A2 --- n_Name [LT] Note on Name (1)
13- 26 A14 --- SpTypeL Literature spectral type (2)
27- 30 I4 pc Dist ? Literature distance (2)
32- 34 I3 pc e_Dist ? Literature distqnce error (2)
36- 42 A7 --- SpTypeB BeSOS spectral type
44- 48 I5 K Teff ? BeSOS effective temperature
50- 52 I3 K e_Teff ? BeSOS effective temperature error
54- 57 F4.2 [cm/s2] logg ? BeSOS surface gravity
59- 62 F4.2 [cm/s2] e_logg ? BeSOS surface gravity error
64- 68 F5.2 Rsun R* ? BeSOS stellar radius
70- 73 F4.2 Rsun e_R* ? BeSOS stellar radius error
75- 80 F6.3 mag E(B-V) ? BeSOS redenning
82- 87 F6.3 mag AV ? BeSOS extinction in V band
89- 93 F5.1 km/s vsini ?=- BeSOS rotational velocity
95- 97 F3.1 km/s e_vsini ? BeSOS rotational velocity error
99 A1 --- l_chi2 Limit flag on chi2
100-106 F7.2 --- chi2 ? chi2 value (3)
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Note (1): LT means low-temperature star, where the best fit was found only for
photometric data.
Note (2): Information from the literature, SpTypeL and Dist, is taken from
the SIMBAD data base.
Note (3): chi2 is the reduced chi-square value obtained for the best fit
using photometric data.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 12-Mar-2021