J/other/RAA/16.138 LAMOST catalog of early-type emission-line stars (Hou+, 2016)
A catalog of early-type emission-line stars and Hα line profiles from
LAMOST DR2.
Hou W., Luo A-L., Hu J.-Y., Yang H.-F., Du C.-D., Liu C., Lee C.-D.,
Lin C.-C., Wang Y.-F., Zhang Y., Cao Z.-H., Hou Y.-H.
<Res. Astron. Astrophys., 16, 138 (2016)>
=2016RAA....16i...6H 2016RAA....16i...6H
=2016RAA....16..138H 2016RAA....16..138H (SIMBAD/NED BibCode)
ADC_Keywords: Stars, emission ; Stars, early-type
Keywords: stars: early-type - stars: emission-line, Be -
stars: pre-main sequence - binaries: close
Abstract:
We present a catalog including 11204 spectra of 10436 early-type
emission-line stars from LAMOST DR2, among which 9752 early-type
emission-line spectra are newly discovered. For these early-type
emission-line stars, we discuss the morphological and physical
properties of their low-resolution spectra. In this spectral sample,
the Hα emission profiles display a wide variety of shapes. Based
on the Hα line profiles, these spectra are categorized into five
distinct classes: single-peak emission, single-peak emission in
absorption, double-peak emission, double-peak emission in absorption,
and P-Cygni profiles. To better understand what causes the Hα
line profiles, we divide these objects into four types from the
perspective of physical classification, which include classical Be
stars, Herbig Ae/Be stars, close binaries and spectra contaminated by
HII regions. The majority of Herbig Ae/Be stars and classical Be stars
are identified and separated using a (H-K, K-W1) color-color
diagram.We also discuss 31 binary systems that are listed in the
SIMBAD on-line catalog and identify 3600 spectra contaminated by HII
regions after cross-matching with positions in the Dubout-Crillon
catalog (1976, Cat. J/A+AS/25/25. A statistical analysis of line
profiles versus classifications is then conducted in order to
understand the distribution of Hα profiles for each type in our
sample. Finally, we also provide a table of 172 spectra with FeII
emission lines and roughly calculate stellar wind velocities for seven
spectra with P-Cygni profiles.
Description:
We provide a catalog including 11204 spectra for 10436 early-type
emission-line stars from LAMOST DR2, among which 9752 early-type
emission-line spectra are newly discovered.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 148 11204 Catalog
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See also:
J/A+AS/25/25 : HII regions of the Northern Milky Way (Dubout-Crillon+ 1976)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- LAMOST LAMOST designation (JHHMMSS.ss+DDMMSS.s)
21- 31 F11.7 deg RAdeg Right ascension (J2000)
32- 42 F11.7 deg DEdeg Declination (J2000)
44- 49 F6.3 mag W1mag ?=- W1 magnitude
51- 55 F5.3 mag e_W1mag ?=- rms uncertainty on W1mag
57- 62 F6.3 mag Hmag ?=- H magnitude
64- 68 F5.3 mag e_Hmag ?=- rms uncertainty on Hmag
70- 75 F6.3 mag Kmag ?=- K magnitude
77- 81 F5.3 mag e_Kmag ?=- rms uncertainty on Kmag
83- 85 A3 --- HaType Morphologial type of Hα profile
87- 98 A12 --- objType Object type, this paper
100-148 A49 --- SIMBADType Simbad object type
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History:
Copied at http://dr2.lamost.org/doc/vac
(End) Patricia Vannier [CDS] 31-Aug-2020