J/AJ/158/22 A new IR study of intrinsic and extrinsic S-type stars (Chen+, 2019)
A new infrared photometric study of intrinsic and extrinsic S-type stars.
Chen P.S., Liu J.Y., Shan H.G.
<Astron. J., 158, 22 (2019)>
=2019AJ....158...22C 2019AJ....158...22C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, S ; Photometry, infrared ; Extinction
Keywords: circumstellar matter - infrared: stars
Abstract:
We collect all known intrinsic and extrinsic S-type stars to discuss
their infrared properties and find their difference in the infrared
using photometric data from the Two Micron All Sky Survey, Wide Field
Infrared Survey Explorer, and Infrared Astronomical Satellite missions.
Then we look for the diagnosis to extract intrinsic S-type stars from
the large unclassified sample. We found that, statistically, intrinsic
S-type stars have larger infrared excesses than extrinsic S-type stars
in the wavelength region of 1-60 µm due to thicker dusty circumstellar
envelopes. We also found that only intrinsic S-type stars occupy the
reddest color areas in all of the two-color diagrams we presented.
Finally, 172 new intrinsic S-type stars are presented in this paper.
This makes the number of known intrinsic S-type stars almost double.
In addition, some intrinsic and extrinsic S-type stars have power-law
distributions in some two-color diagrams with the wavelength longer
than 5 µm. The possible reason for this is also discussed.
Description:
We have collected almost all of the known intrinsic S-type stars and
extrinsic S-type stars from the literature (the candidates are not
included) to study their infrared color properties using 2MASS, WISE,
and IRAS data. Finally 151 certain extrinsic S-type stars and 190
certain intrinsic S-type stars are found.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 162 151 Infrared observation of known extrinsic S-type
stars
table2.dat 162 190 Infrared observation of known intrinsic S-type
stars
table3.dat 43 122 New intrinsic S stars found in this paper
according to the JHK diagram
table4.dat 33 35 New intrinsic S stars found in this paper
according to the W2-W3 color
table5.dat 62 57 New intrinsic S stars found in this paper
according to the IRAS diagram
--------------------------------------------------------------------------------
See also:
III/168 : General Catalog of S Stars, second edition (Stephenson 1984)
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
J/A+A/387/129 : IR observations of S stars (Wang+, 2002)
J/A+A/488/675 : Infrared photometry of mass-losing AGB stars
(Guandalini+, 2008)
Byte-by-byte Description of file: table1.dat table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/190] Star number in this paper
5- 8 I4 --- CSS [3/1346]? Number in the General Catalog of
Galactic S-Stars (G1)
10- 24 A15 --- Name Star name
26- 27 I2 h RAh Hour of Right Ascension (J2000)
29- 30 I2 min RAm Minute of Right Ascension (J2000)
32- 36 F5.2 s RAs Second of Right Ascension (J2000)
38- 38 A1 --- DE- Sign of the Declination (J2000)
39- 40 I2 deg DEd Degree of Declination (J2000)
42- 43 I2 arcmin DEm Arcminute of Declination (J2000)
45- 48 F4.1 arcsec DEs Arcsecond of Declination (J2000)
50- 55 F6.3 mag Jmag [-0.715/8.563] 2MASS J band magnitude
57- 61 F5.3 mag e_Jmag [0.017/0.388] Uncertainty in Jmag
63- 68 F6.3 mag Hmag [-1.882/7.182] 2MASS H band magnitude
70- 74 F5.3 mag e_Hmag [0.015/9.996] Uncertainty in Hmag
76- 81 F6.3 mag Ksmag [-2.351/6.447] 2MASS Ks band magnitude
83- 87 F5.3 mag e_Ksmag [0.015/8.888] Uncertainty in Ksmag
89 A1 --- l_W1mag [<] Limit flag on W1mag
90- 94 F5.3 mag W1mag [0.292/6.198] WISE W1 band (3.4µm) magnitude
96-100 F5.3 mag e_W1mag [0.007/0.541]? Uncertainty in W1mag
102 A1 --- l_W2mag [<] Limit flag on W2mag
103-108 F6.3 mag W2mag [-0.118/6.342]? WISE W2 band (4.6µm) magnitude
110-114 F5.3 mag e_W2mag [0.001/0.464]? Uncertainty in W2mag
116 A1 --- l_W3mag [<] Limit flag on W3mag
117-122 F6.3 mag W3mag [-2.81/6.13] WISE W3 band (12µm) magnitude
124-128 F5.3 mag e_W3mag [0.004/0.274]? Uncertainty in W3mag
130 A1 --- l_W4mag [<] Limit flag on W4mag
131-136 F6.3 mag W4mag [-6.989/5.981] WISE W4 band (22µm) magnitude
138-142 F5.3 mag e_W4mag [0/0.047]? Uncertainty in W4mag
144-147 F4.2 mag Av [0.09/5.72] Galactic extinction coefficient Av
derived in this paper
149-159 A11 --- IRAS Identified IRAS PSC/FSC counterpart
161-162 I2 --- Note [1/13] Reference of the source origin (1)
--------------------------------------------------------------------------------
Note (1): Reference as follows:
1 = Groenewegen (1993A&A...271..180G 1993A&A...271..180G);
2 = Van Eck et al. (2000A&AS..145...51V 2000A&AS..145...51V);
3 = Little-Marenin & Little (1979AJ.....84.1374L 1979AJ.....84.1374L);
4 = Little et al. (1987AJ.....94..981L 1987AJ.....94..981L);
5 = Smith & Lambert (1988ApJ...333..219S 1988ApJ...333..219S);
6 = Brown et al. (1990AJ.....99.1930B 1990AJ.....99.1930B)
7 = Johnson (1992IAUS..151..157J 1992IAUS..151..157J);
8 = Jorissen et al. (1993A&A...271..463J 1993A&A...271..463J);
9 = Jorissen et al. (1998A&A...332..877J 1998A&A...332..877J);
10 = Wang & Chen (2002, J/A+A/387/129);
11 = Uttenthaler et al. (2007A&A...463..251U 2007A&A...463..251U);
12 = Vanture et al. (2007PASP..119..147V 2007PASP..119..147V);
13 = Guandalini & Busso (2008, J/A+A/488/675).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- CSS Number in the General Catalog of Galactic S-Stars
(G1)
9- 13 F5.3 mag Jmag [1.534/9.152] 2MASS J band magnitude
15- 19 F5.3 mag Hmag [0.238/7.507] 2MASS H band magnitude
21- 26 F6.3 mag Ksmag [-0.556/6.81] 2MASS Ks band magnitude
28- 31 F4.2 mag Av [0.16/5.2] Galactic extinction coefficient Av
derived in this paper
33- 37 F5.3 mag (H-Ks)o [0.475/1.882] Dereddened H-Ks color
39- 43 F5.3 mag (J-H)o [0.867/2.477] Dereddened J-H color
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- CSS Number in the General Catalog of Galactic
S-Stars (G1)
9- 13 F5.3 mag W2mag [0.784/6.447] WISE W2 band (4.6µm) magnitude
15- 20 F6.3 mag W3mag [-2.826/5.194] WISE W3 band (12µm) magnitude
22- 25 F4.2 mag Av [0.19/2.84] Galactic extinction coefficient Av
derived in this paper
27- 31 F5.3 mag (W2-W3)o [1.024/3.56] Dereddened W2-W3 color
33 A1 --- f_CSS [*] This object also appears in Table 3
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- CSS Number in the General Catalog of Galactic
S-Stars (G1)
9- 18 A10 --- IRAS Identified IRAS PSC/FSC source
20- 27 E8.2 Jy F12 [0.45/1580] IRAS 12 micron flux
29- 36 E8.2 Jy F25 [0.217/670] IRAS 25 micron flux
38- 45 E8.2 Jy F60 [0.212/145] IRAS 60 micron flux
47- 52 F6.3 --- [12]-[25] [-0.291/1.331] IRAS 12/25 color
54- 59 F6.3 --- [25]-[60] [-0.275/5.261] IRAS 25/60 color
61- 62 A2 --- f_CSS [*+] This object also appears in Table 3 (*)
and/or in Table 4 (+)
--------------------------------------------------------------------------------
Global notes:
Note (G1): The number in the General Catalog of Galactic S-Stars (GCGSS,
simply CSS in this paper) from Stephenson (1984, III/168) and Stephenson
(1990AJ....100..569S 1990AJ....100..569S, simply CSS2).
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 30-Aug-2019