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J/PASJ/62/525       SiO maser survey off the Galactic Plane     (Deguchi+, 2010)

SiO maser survey off the Galactic Plane: A signature of streaming motion. Deguchi S., Shimoikura T., Koike K. <Publ. Astron. Soc. Jap., 62, 525-546 (2010)> =2010PASJ...62..525D
ADC_Keywords: Galactic plane ; Stars, giant ; Masers ; Radial velocities Keywords: Galaxy: disk - Galaxy: kinematics and dynamics - stars: AGB and post-AGB Abstract: A group of Mira variables in the solar neighborhood shows unusual spatial motion in the Galaxy. To study this motion on a much larger scale in the Galaxy, we newly surveyed 134 evolved stars off the Galactic plane by SiO maser lines, obtaining accurate radial velocities of 84 detected stars. Together with the past data of SiO maser sources, we analyzed the radial-velocity data of a large sample of sources distributed in a distance range of about 0.3-6kpc in the first Galactic quadrant. At Galactic longitudes between 20° and 40°, we found a group of stars with large negative radial velocities, which deviate by more than 100km/s from the Galactic rotation. We show that these deviant motions of maser stars are created by periodic gravitational perturbation of the Bulge bar, and that the effect appears most strongly at radii between corotation and outer Lindblad resonances. The resonance effect can explain the displacement of positions from the Galactic plane as well. Description: The observations were made with the 45-m radio telescope at Nobeyama in 2009 April and May by the SiO J=1-0 v=1 and 2 transitions at 43.122 and 42.821GHz, respectively. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 78 85 Observational results of SiO masers table2.dat 40 48 Negative results for SiO detection table3.dat 82 133 Infrared properties of the observed stars table4.dat 77 20 Candidates for deviant motion (|b|>3°)
See also: II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) J/ApJS/106/463 : SiO maser sources (Jiang+ 1996) J/A+AS/127/185 : SiO masers in OH/IR stars, proto-PN and PN (Nyman+ 1998) J/A+AS/132/211 : Interstellar SiO sources (Harju+ 1998) J/A+A/391/967 : H2O and SiO masers in the Galactic center (Sjouwerman+, 2002) J/A+A/393/115 : 86GHz SiO maser survey of late-type stars (Messineo+, 2002) J/A+A/418/103 : 86GHz SiO maser survey in the Inner Galaxy (Messineo+, 2004) J/A+A/435/575 : 86GHz SiO maser survey of late-type stars (Messineo+, 2005) J/ApJ/669/446 : Observations of SiO masers (Nakashima+, 2007) J/PASJ/53/293 : IRAS/SiO sources toward Galactic Bulge (Deguchi+, 2001) J/PASJ/54/719 : IRAS/SiO sources in the Galactic bulge (Deguchi+, 2002) J/PASJ/55/203 : SiO maser survey toward inner Galactic disk (Nakashima+, 2003) J/PASJ/55/229 : SiO maser survey of cold IRAS sources (Nakashima+, 2003) J/PASJ/56/261 : SiO maser survey in Galactic center (Deguchi+, 2004) J/PASJ/56/765 : SiO maser survey of IRAS sources (Degychi+, 2004) J/PASJ/58/529 : SiO Maser Survey in Galactic Bulge (Fujii+, 2006) J/PASJ/59/559 : SiO maser search off the Galactic plane (Deguchi+, 2007) J/PASJ/62/391 : SiO and H2O maser in Galactic disk clusters (Deguchi+, 2010) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs) 19- 23 F5.3 K Ta1 ?=- Antenna temperature at the intensity peak for SiO J=1-0 v=1 line 25- 29 F5.1 km/s VLSR1 ?=- LSR radial velocity for SiO J=1-0 v=1 line (43.122GHz) 31- 36 F6.3 K.km/s LF1 ?=- Integrated line intensity for SiO J=1-0 v=1 line (43.122GHz) 38- 42 F5.3 K rms1 Root mean square of the noise level for SiO J=1-0 v=1 line 44- 48 F5.3 K Ta2 ?=- Antenna temperature at the intensity peak for SiO J=1-0 v=2 line (42.821GHz) 50- 54 F5.1 km/s VLSR2 ?=- LSR radial velocity for SiO J=1-0 v=2 line (42.821GHz) 56- 61 F6.3 K.km/s LF2 ?=- Integrated line intensity for SiO J=1-0 v=2 line 63- 67 F5.3 K rms2 Root mean square of the noise level for SiO J=1-0 v=2 line 69- 78 A10 "YYYY/MM/DD" ObsDate Observation date
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs) 19- 23 F5.3 K rms1 Root mean square of the noise level for SiO J=1-0 v=1 line 25- 29 F5.3 K rms2 Root mean square of the noise level for SiO J=1-0 v=2 line 31- 40 A10 "YYYY/MM/DD" ObsDate Observation date
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs) 19- 25 F7.3 deg GLON Galactic longitude 27- 33 F7.3 deg GLAT Galactic latitude 35- 39 F5.3 mag Kmag 2MASS apparent K magnitude (1) 41- 45 F5.3 mag H-K 2MASS H-K colour index 47- 51 F5.3 mag Kmagc Corrected K magnitude 53- 62 A10 --- IRAS IRAS name (HHMMm+DDMM) 65- 69 F5.2 Jy F12 IRAS flux density at 12um 71- 76 F6.3 --- C12 IRAS C12 (log(F25um/F12um)) colour index 78- 82 F5.1 km/s v(SiO) ? Average LSR velocity of SiO maser lines
Note (1): 2MASS photometric uncertainties are about 0.2mag for bright stars with K<4 (see http://www.ipac.caltech.edu/2mass:releases/allsky/doc/sec2_2.html)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs) 18 A1 --- n_2MASS [*+] Note on 2MASS (1) 20- 29 A10 --- IRAS IRAS name (HHMMm+DDMM) 31- 35 F5.2 deg GLON Galactic longitude 37- 42 F6.2 deg GLAT Galactic latitude 44- 48 F5.1 km/s vLSR LSR radial velocity 50- 54 F5.2 mag Kmag 2MASS apparent K magnitude 56- 59 F4.2 mag H-K 2MASS H-K colour index 61- 65 F5.2 mag Kmagc Corrected K magnitude 67- 71 F5.1 Jy F12um IRAS flux density at 12um 73- 77 F5.2 --- C12 IRAS C12 (log(F25um/F12um)) colour index
Note (1): Note as follows: * = Hipparcos proper motion data exist + = Detection in this work
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Jun-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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