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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 (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,, 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) : 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,, 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, Cat. J/other/NewA/9.509 Zhang et al., Paper II 2005NewA...10..325Z, Cat. J/other/NewA/10.325 Chen et al., Paper III 2016NewA...44....1C, Cat. J/other/NewA/44.1
(End) Patricia Vannier [CDS] 02-May-2018
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