J/A+A/394/975 OH 5-cm line survey in late-type stars (Desmurs+, 2002)
A high-sensitivity OH 5-cm line survey in late-type stars
Desmurs J.-F., Baudry A., Sivagnanam P., Henkel C.
<Astron. Astrophys. 394, 975 (2002)>
=2002A&A...394..975D 2002A&A...394..975D
ADC_Keywords: Masers ; Surveys ; Stars, late-type ; Stars, giant ; Radio sources
Keywords: masers - stars: AGB and post-AGB - radio lines: stars
Abstract:
We have undertaken a comprehensive search for 5-cm excited OH maser
emission from evolved stars representative of various stages of late
stellar evolution. Observed sources were selected from known 18-cm OH
sources. This survey was conducted with the 100-m Effelsberg
telescope, at 6.0GHz in Sep 2000, to achieve high signal to noise
ratio observations and a sensitivity limit of about 0.05 to 0.1Jy. A
total of 65 stellar sources were searched for both main line and
satellite line emission. We confirm the previous detection of 5 cm OH
in Vy 2-2, do not confirm emission from NML-Cyg and do not report any
other new detection within the above sensitivity limit.
The number of observed sources is 67.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 93 67 Observations of the 6GHz OH maser transitions in
AGB stars
table1.tex 107 135 LaTeX version of table1
--------------------------------------------------------------------------------
See also:
V/18 : Catalogue of Late-type Stars with Maser Emission (Engels 1979)
J/A+A/277/453 : OH maser survey of cool IRAS sources (David+ 1993)
J/A+A/325/255 : 5cm OH masers survey (Baudry+ 1997)
J/A+AS/119/459 : Search for OH maser emission from post-AGB
(te Lintel Hekkert+ 1996)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- IRAS IRAS name of the source
13- 25 A13 --- Name Alternative source name
27- 41 A15 --- Type Source type (1)
43- 44 I2 h RAh Right ascension (J2000.0) (2)
46- 47 I2 min RAm Right ascension (J2000.0)
49- 54 F6.3 s RAs Right ascension (J2000.0)
56 A1 --- DE- Declination sign (J2000.0)
57- 58 I2 deg DEd Declination (J2000.0)
60- 61 I2 arcmin DEm Declination (J2000.0)
63- 67 F5.2 arcsec DEs Declination (J2000.0)
70- 73 I4 km/s Vel1 Lower limit of the observed velocity Range
74 A1 --- --- [/]
75- 78 I4 km/s Vel2 Upper limit of the observed velocity Range
81- 85 F5.1 km/s RVlsr LSR radial velocity
88 A1 --- n_Sen [E] E = Emission
89 A1 --- --- [/]
90- 93 F4.2 Jy Sen ? Sensitivity at 6GHz (3)
--------------------------------------------------------------------------------
Note (1): The following abbreviations are used:
UCHII: Ultra Compact HII region
SG: Supergiant
SR: Semi-regular variable
PN: Planetary nebula
PPN: Proto-planetary nebula
Note (2): B1950 coordinates processed to J2000 within GILDAS package
Note (3): The upper limits correspond to 3σ
--------------------------------------------------------------------------------
Acknowledgements: Jean-Francois Desmurs
(End) Patricia Bauer [CDS] 28-Aug-2002