J/AJ/144/129 Properties of 83 known stellar SiO maser sources (Cho+, 2012)
Simultaneous observations of SiO and H2O masers toward known stellar SiO maser
sources.
Cho S.-H., Kim J.
<Astron. J., 144, 129 (2012)>
=2012AJ....144..129C 2012AJ....144..129C
ADC_Keywords: Masers ; Stars, variable ; Spectral types ; Radial velocities ;
Radio lines
Keywords: circumstellar matter - masers - radio lines: stars - stars: late-type
Abstract:
We carried out simultaneous observations of four maser lines, SiO
v=1,2, 29SiO v=0,J=1-0, and H2O 616-523, toward 83 known SiO
maser sources without H2O maser detections using the Korean VLBI
Network single dish telescopes. Both SiO and H2O masers were
detected from 14 sources, resulting in a detection rate of 16.9%.
H2O maser emission without SiO maser emission was detected from one
source. Therefore, H2O maser emission was newly detected from 15
sources. SiO maser emission without H2O detection was detected from
55 sources, which gives a total SiO maser detection rate of 83.1% when
including sources that have both SiO and H2O maser emission
detected. SiO v=2 maser emission was detected from nine sources
without v=1 maser detection. The SiO v=2 maser sources without the v=1
maser detections need to be investigated, with a large number of v=2
only maser sources related to the development of dust shells and their
evolutionary sequence from asymptotic giant branch (AGB) to post-AGB
stars. The average values of the peak and integrated antenna
temperature ratios of H2O to SiO masers are 0.44 and 0.28 in the 14
sources that have both SiO and H2O detections. Observational
characteristics of several individual sources are noted and the
dependence of the different maser intensity ratios on the stellar
phase is discussed. In addition, the observational results of SiO and
H2O masers are discussed in IRAS two-color diagrams.
Description:
We selected 83 known stellar SiO maser sources for which H2O masers
were not detected within the upper limits 0.3-2.0Jy at the peak flux
(except for No. 20. V Cam). Table 2 lists the details of the 83
observed sources based on the observational results of Cho et al.
(1996A&AS..115..117C 1996A&AS..115..117C, 1998ApJS..115..277C 1998ApJS..115..277C, 2009ApJS..181..421C 2009ApJS..181..421C) with
the 45m telescope of the Nobeyama Radio Observatory and the 14m
telescope of the Taeduk Radio Astronomy Observatory and results of
Takaba et al. (2001, Cat. J/PASJ/53/517) with the 34m telescope of the
Kashima Space Research Center.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 95 83 List of the observed SiO maser sources
refs.dat 65 34 References
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)
III/254 : 2nd Cat. of RVs with Astrometric Data (Kharchenko+, 2007)
III/190 : WEB Catalog of Radial Velocities (Duflot+ 1995)
V/68 : Stellar Maser Observations (Benson+ 1990)
V/18 : Catalogue of Late-type Stars with Maser Emission (Engels, 1979)
J/PASJ/59/559 : SiO maser search off the Galactic plane (Deguchi+, 2007)
J/PASJ/56/765 : SiO maser survey of IRAS sources (Degychi+, 2004)
J/PASJ/55/229 : SiO maser survey of cold IRAS sources (Nakashima+, 2003)
J/AJ/123/2772 : OH-selected AGB and post-AGB objects. I. (Sevenster+, 2002)
J/A+A/393/115 : 86GHz SiO maser survey of late-type stars (Messineo+, 2002)
J/A+A/366/481 : ATCA/VLA OH 1612 MHz survey. III. (Sevenster+, 2001)
J/PASJ/53/517 : Water maser survey of late-type stars (Takaba+, 2001)
J/A+A/368/1006 : Properties of OH/IR stars with IRAS LRS spectra (Chen+, 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/ApJS/106/463 : SiO maser sources (Jiang+ 1996)
J/A+AS/111/237 : OH detections from circumstellar shells (Lewis+, 1995)
J/A+A/296/727 : Semiregular variables H2O maser (Szymczak+, 1995)
J/A+AS/93/121 : CO emission from a sample of IRAS sources (Nyman+ 1992)
J/A+AS/90/327 : 1612MHz OH survey of IRAS point sources
(te Lintel Hekkert+ 1991)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Running sequence number
4- 18 A15 --- Source Source name
20- 22 A3 --- Type Object type from SIMBAD astronomical
database (1)
24- 25 I2 h RAh Hour of Right Ascension (J2000) (2)
27- 28 I2 min RAm Minute of Right Ascension (J2000) (2)
30- 34 F5.2 s RAs Second of Right Ascension (J2000) (2)
36 A1 --- DE- Sign of the Declination (2)
37- 38 I2 deg DEd Degree of Declination (J2000) (2)
40- 41 I2 arcmin DEm Arcminute of Declination (J2000) (2)
43- 46 F4.1 arcsec DEs Arcsecond of Declination (J2000) (2)
48- 53 F6.1 km/s RV ? Radial velocity of the central star
55 I1 --- r_RV ? Reference for RV; in refs.dat file
57- 68 A12 --- SpT Spectral type (3)
70- 76 F7.2 d Per ? Variability period (3)
78 A1 --- f_SiO [e] SiO transition is J=2-1)
80- 84 F5.1 Jy SiO Peak flux density of SiO (v=1, J=1-0 or J=2-1,
see f_SiO). The SiO maser emission was
detected above 0.5Jy at the peak flux.
86- 87 I2 --- r_SiO Reference for SiO; in refs.dat file
89 A1 --- l_H2O Upper limit on H2O
90- 93 F4.1 Jy H2O ? Peak flux density of H2O (616-523)
95 A1 --- r_H2O Reference for H2O; in refs.dat file
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Note (1): Source type as follows:
IR = Infrared source;
Ir* = Irregular variable star;
Mas = OH maser source;
Mi* = Variable star of Mira Cet type;
OH* = Star of OH/IR type;
sr* = Semi-regular variable star.
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- 44 A21 --- Aut Author's name
46- 65 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
Kim et al., Paper III 2013AJ....145...22K 2013AJ....145...22K Cat. J/AJ/145/22
Kim et al., Paper IV, 2014AJ....147...22K 2014AJ....147...22K, Cat. J/AJ/147/22
(End) Sylvain Guehenneux [CDS] 27-Nov-2013