J/MNRAS/463/1162 Infrared photometry of Be stars (Chen+, 2016)
A new approach to the infrared photometric study of Be stars.
Chen P.S., Liu J.Y., Shan H.G.
<Mon. Not. R. Astron. Soc., 463, 1162-1172 (2016)>
=2016MNRAS.463.1162C 2016MNRAS.463.1162C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, Be ; Photometry, infrared
Keywords: Infrared: stars- stars: Be star
Abstract:
In this paper, we have collected data for almost all Be stars known so
far (1991 sources in total) and photometrically study their infrared
properties. 2MASS, WISE, IRAS and Akari data are analysed. It is shown
from several two-colour diagrams that from 1 to 60um, infrared
excesses for the majority of Be stars are mainly due to the
free-free emission or the bound-free emission from
proton-electron scattering, while for only a small number of Be
stars their infrared excess originates from dust thermal radiation or
is caused by the nebulosity/binarity effects. However, in the
wavelength range 3.4-12um (the WISE W1, W2 and W3 bands), some Be
stars show the properties of dust thermal radiation, which is probably
due to silicate dust emission and/or polycyclic aromatic hydrocarbon
emission. In addition, it is found in this paper that infrared colour
excesses indeed increase with wavelength for Be stars. However, no
correlations between infrared colours and spectral type can be found
for Be stars. Furthermore, several stars have very large infrared
excesses in the near-infrared. The reasons for such infrared excesses
are given in more detail.
Description:
We mainly concentrate on large Be star catalogues published in the
literature to construct our working sample. Our initial sample are the
1185 Be stars from Paper II (Zhang et al., 2005, Cat.
J/other/NewA/10.325), which includes almost all Galactic Be stars
known at that time. Then, we combine them with the new catalogue of
about 2000 Be stars of Neiner et al. (2011AJ....142..149N 2011AJ....142..149N,
http://basebe.obspm.fr), the 261 new Be star found by Chojnowski et
al. (2015, Cat. J/AJ/149/7) from the Apache Point Observatory Galactic
Evolution Experiment (APOGEE), and the 181 IPHAS-selected new Be stars
among the 247 Be stars of Raddi et al. (2015, Cat. J/MNRAS/446/274).
Thus, we have mainly collected Be stars from these references
mentioned above.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 197 1991 Infrared properties of Be stars in this paper
--------------------------------------------------------------------------------
See also:
J/other/NewA/9.509 : IRAS observations of Be stars (Zhang+, 2004)
J/other/NewA/10.325 : 2MASS observations of Be stars (Zhang+, 2005)
J/AJ/149/7 : SDSS-III/APOGEE. I. Be stars (Chojnowski+, 2015)
J/MNRAS/446/274 : A deep catalogue of classical Be stars (Raddi+, 2015)
J/other/NewA/44.1 : IR photometric study og Herbig Ae/Be stars (Chen+, 2016)
http://basebe.obspm.fr : BeSS database Home Page
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq [1/1991] Sequential number
6- 32 A27 --- Name Name
33 A1 --- n_RAh [*] Note on position (1)
34- 35 I2 h RAh Right ascension (J2000)
37- 38 I2 min RAm Right ascension (J2000)
40- 44 F5.2 s RAs Right ascension (J2000)
46 A1 --- DE- Declination sign (J2000)
47- 48 I2 deg DEd Declination (J2000)
50- 51 I2 arcmin DEm Declination (J2000)
53- 57 F5.2 arcsec DEs Declination (J2000)
58 A1 --- n_SpType [*] Note on SpType (2)
59- 68 A10 --- SpType Spectral type
70 A1 --- l_W1mag Upper limti flag on W1mag
71- 76 F6.3 mag W1mag ?=- W1 magnitude
78- 82 F5.3 mag e_W1mag ?=- rms uncertainty on W1mag
84 A1 --- l_W2mag Upper limit flag on W2mag
85- 90 F6.3 mag W2mag ?=- W2 magnitude
92- 96 F5.3 mag e_W2mag ?=- rms uncertainty on W2mag
98 A1 --- l_W3mag Upper limit flag on W3mag
99-104 F6.3 mag W3mag ?=- W3 magnitude
106-110 F5.3 mag e_W3mag ?=- rms uncertainty on W3mag
112 A1 --- l_W4mag Upper limit flag on W4mag
113-118 F6.3 mag W4mag ?=- W4 magnitude
120-124 F5.3 mag e_W4mag ?=- rms uncertainty on W4mag
126 A1 --- l_Jmag Upper limit flag on Jmag
127-132 F6.3 mag Jmag 2MASS J magnitude
134-138 F5.3 mag e_Jmag ?=- rms uncertainty on Jmag
140 A1 --- l_Hmag Upper limit flag on Hmag
141-146 F6.3 mag Hmag 2MASS H magnitude
148-152 F5.3 mag e_Hmag ?=- rms uncertainty on Hmag
154 A1 --- l_Kmag Upper limit flag on Kmag
155-160 F6.3 mag Kmag ?=- 2MASS K magnitude
162-166 F5.3 mag e_Kmag ?=- rms uncertainty on Kmag
168-172 F5.3 mag AV ?=- Galactic extinction coefficient
173 A1 --- r_AV [ab] Reference on AV (3)
175-185 A11 --- IRAS IRAS name
187-197 A11 --- Notes Notes
--------------------------------------------------------------------------------
Note (1): * indicates the position is from the Simbad database, and for the
remaining sources, the positions are from the original papers, i.e.
Paper II, (Zhang et al., 2005, Cat.J/other/NewA/10.325),
Neiner et al. (2011AJ....142..149N 2011AJ....142..149N, http://basebe.obspm.fr),
Chojnowski et al. (2015, Cat. J/AJ/149/7) or
Raddi et al. (2015, Cat. J/MNRAS/446/274).
Note (2): * indicates the spectral type is from
Kharchenko & Roeser (2009, Cat. I/280) or Skiff (2009-2016, Cat. B/mk).
Note (3): Notes as follows:
a = from Raddi et al. (2015, Cat J/MNRAS/446/274)
b = calculated according to Chen, Shan & Zhang (2016, Cat. J/other/NewA/44.1)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Zhang et al., Paper I 2004NewA....9..509Z 2004NewA....9..509Z, Cat. J/other/NewA/9.509
Zhang et al., Paper II 2005NewA...10..325Z 2005NewA...10..325Z, Cat. J/other/NewA/10.325
Chen et al., Paper III 2016NewA...44....1C 2016NewA...44....1C, Cat. J/other/NewA/44.1
(End) Patricia Vannier [CDS] 02-May-2018