J/other/BASI/39.517 Spectroscopy of classical Be stars (Mathew+, 2011)
Optical spectroscopy of classical Be stars in open clusters.
Mathew B., Subramaniam A.
<Bull. Astron. Soc. India, 39, 517-537 (2011)>
=2011BASI...39..517M 2011BASI...39..517M
ADC_Keywords: Clusters, open ; Stars, Be ; Spectroscopy
Keywords: stars: formation - stars: emission-line, Be -
(Galaxy:) open clusters and associations: general - surveys
Abstract:
We present a spectroscopic study of 150 Classical Be stars in 39 open
clusters using medium resolution spectra in the wavelength range
3800-9000Å. One-third of the sample (48 stars in 18 clusters) has
been studied for the first time. All these candidates were identified
from an extensive survey of emission stars in young open clusters
using slitless spectroscopy (Mathew et al., 2008MNRAS.388.1879M 2008MNRAS.388.1879M). This
large data set covers CBe stars of various spectral types and ages
found in different cluster environments in largely northern open
clusters, and is used to study the spectral characteristics of CBe
stars in cluster environments.
Description:
The spectroscopic observations were done using the Himalayan Faint
Object Spectrograph Camera (HFOSC) available with the 2.0m Himalayan
Chandra Telescope (HCT), located at Hanle and operated by the Indian
Institute of Astrophysics (IIA).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 142 150 The journal of observations
table2.dat 99 150 Spectral lines identified in classical Be stars
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See also:
J/A+AS/119/271 : Be stars uvbyβ photometry (Fabregat+, 1996)
J/ApJS/161/118 : byHα photometry in open clusters (McSwain+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Cluster Cluster name
14- 17 A4 --- Star Emission star designation within the cluster
18 A1 --- n_Star [*] * for newly identified CBe
20- 29 A10 "DD-MM-YYYY" Date Observation date
31- 34 I4 s Dt Integration time
36- 37 I2 h RAh Rigth ascension (J2000)
39- 40 I2 min RAm Rigth ascension (J2000)
42- 46 F5.2 s RAs Rigth ascension (J2000)
48 A1 --- DE- Declination sign (J2000)
49- 50 I2 deg DEd Declination (J2000)
52- 53 I2 arcmin DEm Declination (J2000)
55- 59 F5.2 arcsec DEs Declination (J2000)
61- 65 A5 --- SpType MK spectral type
67- 71 F5.1 0.1nm W(Ha) ?=- Hα equivalent width
73- 78 F6.1 Myr Age ? Estimated age
80- 89 A10 "DD-MM-YYYY" Date2 Second Observation date
91- 94 I4 s Dt2 ? Observation 2 Integration time
96-100 F5.1 0.1nm W(Ha)2 ?=- Observation 2 Hα equivalent width
102-111 A10 "DD-MM-YYYY" Date3 Third Observation date
113-116 I4 s Dt3 ? Observation 3 Integration time
118-122 F5.1 0.1nm W(Ha)3 ?=- Observation 3 Hα equivalent width
124-133 A10 "DD-MM-YYYY" Date4 Fourth Observation date
135-137 I3 s Dt4 ? Observation 4 Integration time
139-142 F4.1 0.1nm W(Ha)4 ?=- Observation 4 Hα equivalent width
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Cluster Cluster name
14- 17 A4 --- Star Emission Star designation within the cluster
20- 28 A9 --- Hb Nature of Hβ line (1)
30- 35 A6 --- FeII Nature of FeII lines
37- 53 A17 --- OI OI features (1)
55- 99 A45 --- Others Other features (1)
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Note (1): Emission/absorption codes:
(e) = emission profile
(a) = absorption
(dpe) = double-peaked emission
(eina) = emission in absorption
(ce) = core-emission
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 28-Jan-2012