J/AJ/145/22 Simultaneous SiO and H2O maser observations (Kim+, 2013)
Simultaneous observations of SiO and H2O masers toward known stellar H2O
maser sources.
Kim J., Cho S.-H., Kim S.J.
<Astron. J., 145, 22 (2013)>
=2013AJ....145...22K 2013AJ....145...22K
ADC_Keywords: Stars, masers ; Stars, variable ; Spectral types ; Radio lines ;
Radial velocities
Keywords: circumstellar matter - masers - radio lines: stars -
stars: AGB and post-AGB - stars: late-type - surveys
Abstract:
We present the results of simultaneous observations of SiO v=1,2,
29SiO v=0, J=1-0, and H2O 616-523 maser lines toward 152 known
stellar H2O maser sources using the Yonsei 21m radio telescope of
the Korean VLBI Network from 2009 June to 2011 January. Both SiO and
H2O masers were detected from 62 sources with a detection rate of
40.8%. The SiO-only maser emission without H2O maser detection was
detected from 27 sources, while the H2O-only maser without SiO maser
detection was detected from 22 sources. Therefore, the overall SiO
maser emission was detected from 89 sources, resulting in a detection
rate of 58.6%. We have identified 70 new detections of the SiO maser
emission. For both H2O and SiO maser detected sources, the peak and
integrated antenna temperatures of SiO masers are stronger than those
of H2O masers in both Mira variables and OH/IR stars and the
relative intensity ratios of H2O to SiO masers in OH/IR stars are
larger than those in Mira variables. In addition, distributions of 152
observed sources were investigated in the IRAS two-color diagram.
Description:
We selected 152 H2O maser sources from the observational results of
Takaba et al. (2001, cat. J/PASJ/53/517). Takaba et al. (2001, cat.
J/PASJ/53/517) have detected H2O maser emission from 179 sources
among 643 objects, which were chosen from the IRAS Point Source
Catalog (cat. II/125) based on IRAS two-color diagrams.
We carried out simultaneous observations of SiO v=1,2, J=1-0
(43.122080GHz and 42.820587GHz), 29SiO v=0, J=1-0 (42.879916GHz),
and H2O 616-523 (22.235080GHz) maser lines for 152 known stellar
H2O maser sources. Observations of SiO and H2O masers occurred
from 2009 June to 2010 February using the Korean VLBI Network (KVN)
Yonsei telescope. Confirmation observations have also been performed
toward five sources with a bad signal-to-noise ratio (No. 13, IR Per;
No. 40, AY Vir; No. 48, RZ Sco; No. 101, UV Cyg; and No. 134, IRAS
21174+1747) during 2011 January. The KVN antenna optics were designed
for simultaneous observations of four bands, namely the H2O 22GHz
and SiO 43, 86, 129GHz bands using three low pass filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 93 152 List of observed sources
refs.dat 67 45 References
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See also:
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)
III/227 : General Catalog of galactic Carbon stars, 3d Ed. (Alksnis+ 2001)
III/184 : 3rd Bibliog. Cat. of Stellar Radial Vel. (Barbier-Brossat+, 1994)
V/68 : Stellar Maser Observations (Benson+ 1990)
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
V/18 : Catalogue of Late-type Stars with Maser Emission (Engels, 1979)
J/AJ/144/129 : Properties of 83 known stellar SiO maser sources (Cho+, 2012)
J/PASJ/64/4 : SiO maser survey of nearby red variables (Deguchi+, 2012)
J/PASJ/62/525 : SiO maser survey off the Galactic Plane (Deguchi+, 2010)
J/ApJ/658/1096 : H2O maser classification (Deacon+, 2007)
J/PASJ/59/559 : SiO maser search off the Galactic plane (Deguchi+, 2007)
J/PASJ/55/229 : SiO maser survey of cold IRAS sources (Nakashima+, 2003)
J/A+A/368/845 : Arcetri Catalog of H2O maser sources (Valdettaro+, 2001)
J/A+A/368/1006 : Properties of OH/IR stars with IRAS LRS spectra (Chen+, 2001)
J/PASJ/53/517 : Water maser survey of late-type stars (Takaba+, 2001)
J/MNRAS/317/460 : Kinematics of Mira stars (Feast+, 2000)
J/A+AS/127/185 : SiO masers in OH/IR stars, proto-PN and PN (Nyman+ 1998)
J/A+A/296/727 : Semiregular variables H2O maser (Szymczak+, 1995)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Running sequence number
5- 19 A15 --- Source Name of the source
21- 23 A3 --- Type Object type as defined in SIMBAD database (1)
25- 26 I2 h RAh Hour of Right Ascension (J2000) (2)
28- 29 I2 min RAm Minute of Right Ascension (J2000) (2)
31- 35 F5.2 s RAs Second of Right Ascension (J2000) (2)
37 A1 --- DE- Sign of the Declination (J2000) (2)
38- 39 I2 deg DEd Degree of Declination (J2000) (2)
41- 42 I2 arcmin DEm Arcminute of Declination (J2000) (2)
44- 47 F4.1 arcsec DEs Arcsecond of Declination (J2000) (2)
49- 54 F6.1 km/s RV ? Radial velocity of the central star
56 I1 --- r_RV ? Reference for RV; in refs.dat file
58- 68 A11 --- SpT Spectral type (3)
70- 75 F6.2 d Per ? Period (3)
77- 81 F5.1 Jy H2O Peak flux density of H2O (616-523, 22GHz)
83- 84 I2 --- r_H2O Reference for H2O; in refs.dat file
86 A1 --- f_SiO [*] SiO transition is J=2-1
87 A1 --- l_SiO Upper limit flag on SiO
88- 91 F4.1 Jy SiO ? Peak flux density of SiO (v=1, J=1-0 or J=2-1,
see f_SiO)
93 A1 --- r_SiO Reference for SiO; in refs.dat file
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Note (1): Source type as follows:
IR = Infrared source;
Ir* = Irregular variable star;
Mi* = Variable star of Mira Cet type;
OH* = Star of OH/IR type;
sr* = Semi-regular variable star;
C* = Carbon star;
pA* = Post-AGB star (proto-PN);
SG = Supergiant.
Note (2): From NASA/IPAC Infrared Science Archive.
Note (3): From Samus et al. (2011, B/gcvs), Benson et al. (1990, V/68) and
the International Database of the American Association of Variable
Star Observers (AAVSO) (B/vsx).
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Ref Reference code
4- 22 A19 --- BibCode Bibliographic code
24- 46 A23 --- Aut Author's name
48- 67 A20 --- Com Comments
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History:
From electronic version of the journal
References:
Kim et al., Paper I, 2010ApJS..188..209K 2010ApJS..188..209K
Cho & Kim, Paper II, 2012AJ....144..129C 2012AJ....144..129C, Cat. J/AJ/144/129
Kim et al., Paper IV, 2014AJ....147...22K 2014AJ....147...22K, Cat. J/AJ/147/22
(End) Sylvain Guehenneux [CDS] 05-Mar-2014