J/A+A/591/A140 IPHAS-selected classical Be stars (Gkouvelis+, 2016)
Physical parameters of IPHAS-selected classical Be stars.
I. Determination procedure and evaluation of the results.
Gkouvelis L., Fabregat J., Zorec J., Steeghs D., Drew J.E., Raddi R.,
Wright N.J., Drake J.J.
<Astron. Astrophys. 591, A140 (2016)>
=2016A&A...591A.140G 2016A&A...591A.140G (SIMBAD/NED BibCode)
ADC_Keywords: Stars, early-type ; Stars, Be ; Stars, distances
Keywords: stars: early-type - stars: emission-line, Be -
stars: fundamental parameters- stars: distances -
Galaxy: structure - techniques: spectroscopic
Abstract:
We present a semi-automatic procedure to obtain fundamental physical
parameters and distances of classical Be (CBe) stars, based on the
Barbier-Chalonge-Divan (BCD) spectrophotometric system. Our aim is to
apply this procedure to a large sample of CBe stars detected by the
IPHAS photometric survey, to determine their fundamental physical
parameters and to explore their suitability as galactic structure
tracers. In this paper we describe the methodology used and the
validation of the procedure by comparing our results with those
obtained from different independent astrophysical techniques for
subsamples of stars in common with other studies. We also present a
test case study of the galactic structure in the direction of the
Perseus Galactic Arm, in order to compare our results with others
recently obtained with different techniques and the same sample of
stars. We did not find any significant clustering of stars at the
expected positions of the Perseus and Outer Galactic Arms, in
agreement with previous studies in the same area that we used for
verification.
Description:
Photometric r magnitudes, HαEW, BCD parameters, effective
temperatures and spectral classification for the stars studied in this
work (table 5). Spectroscopic gradient, colour excess, absolute and
intrinsic magnitudes and distances for the stars studied in this work
(table 6). The parameters of stars with multiple spectra have been
measured from each individual spectrum.
They appear as multiple entries, with the same correlative number in
the ID column
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 74 257 Physical Parameters of CBe stars
table6.dat 62 257 Physical Parameters of CBe stars
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See also:
J/MNRAS/446/274 : A deep catalogue of classical Be stars (Raddi+, 2015)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID ID number for each star on this work
5- 23 A19 --- IPHAS IPHAS name of each star (JHHMMSS.ss+DDMMSS.s)
25- 29 F5.1 deg GLON Galactic longitude (J2000.0)
31- 35 F5.2 deg GLAT Galactic latitude (J2000.0)
37- 41 F5.2 mag rmag Photometric magnitude in the r filter
43- 48 F6.2 0.1nm EWHa Equivalent width of the Hα line
50- 54 F5.3 --- D Balmer Jump depth (BCD parameter D)
56- 59 F4.1 0.1nm Lambda1 Balmer jump average position
(BCD parameter Lambda1)
61- 65 I5 K Teff Effective temperature
67- 74 A8 --- SpType BCD spectral classification
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID ID number for each star on this work
5- 9 F5.3 mag Phib Paschen continuum energy gradient
11- 15 F5.3 mag Phib0 Intrinsic Paschen continuum energy gradient
17- 21 F5.2 mag VMAG Absolute magnitude in V band
23- 27 F5.3 mag E(B-V) Colour excess
29- 33 F5.3 mag AV Interstellar reddening in the V band
35- 39 F5.3 mag Ar Interstellar reddening in the r band
41- 44 F4.2 --- fD Circumstellar emission indicator
46- 50 F5.3 mag Ecs(B-V) Circumstellar excess
52- 56 F5.3 mag Deltar Circumstellar correction in the r band
58- 62 F5.2 kpc d Distance of each CBe star
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Acknowledgements:
Leonardos Gkouvelis, gouvelis(at)gmail.com
(End) Leonardos Gkouvelis [Greece], Patricia Vannier [CDS] 20-Jun-2016