J/AZh/84/839 Methanol emission of isolated maser condensations (Larionov+, 2007)
The methanol emission of isolated maser condensations:
statistical velocity distribution.
Larionov G.M., Val'tts I.E.
<Astron. Zh. 84, 839 (2007)>
=2007AZh....84..839L 2007AZh....84..839L
=2007ARep...51..756L 2007ARep...51..756L
ADC_Keywords: Molecular clouds ; Masers ; Radial velocities
Abstract:
The distribution of the radial velocities of class I methanol masers
relative to the velocities of their parent molecular clouds is
analyzed. This analysis is based on catalog data for methanol masers
detected up to the present time in both the northern and southern
hemispheres, together with catalog data for the CS(2-1) line, which
traces dense, quiescent gas. Results for a large sample of sources
show that, in contrast to class II methanol masers, which undergo
Keplerian motions in protoplanetary disks, class I methanol masers
retain their velocities in the local system of rest of the surrounding
medium, and do not participate in the ejection of matter in bipolar
out flows. They can be adequately described using a model in which
matter ejected from active parts of the associated star-forming
regions flows around isolated maser condensations. This compresses the
maser clumps, enhancing the concentration of methanol and facilitating
collisional pumping of the masers.
Description:
We present a master list of masers toward which CS(2-1) line emission
formed in the dense medium surrounding the maser condensation is
observed. This table includes parameters for features in 72 class I
masers, whose data are taken from the catalogs [9-13], together with
the parameters of associated CS(2-1) lines, whose data are taken from
[14-19].
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 74 148 Parameters of methanol maser lines at 44GHz and
CS(2-1) thermal lines observed toward class I
methanol masers
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See also:
J/AZh/71/37 : Thermal Methanol from 33 Clouds at 48 GHz (Slysh+, 1994)
J/A+AS/124/85 : OH emission from IRAS sources (Slysh+ 1997)
J/AZh/72/22 : A 95 GHz Survey of Methanol Masers (Valtts+, 1995)
J/A+AS/134/115 : Medicina 6.7GHz methanol masers survey (Slysh+ 1999)
J/AZh/79/328 : Methanol maser condensations in W 48 (Val'tts+, 2002)
J/AZh/84/579 : Catalog of Class I methanol masers (Val'tts+, 2007)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Source name
15- 16 I2 h RAh Right ascension (B1950)
18- 19 I2 min RAm Right ascension (B1950)
21- 25 F5.2 s RAs Right ascension (B1950)
27 A1 --- DE- Declination sign (B1950)
28- 29 I2 deg DEd Declination (B1950)
31- 32 I2 arcmin DEm Declination (B1950)
34- 38 F5.2 arcsec DEs Declination (B1950)
39 A1 --- R [*] Note on NGC 6334 F position (1)
40- 45 F6.2 km/s Vlsr1 ? CH3OH(70-61A+) LSR velocity
47- 52 F6.2 Jy Flux ? CH3OH(70-61A+) flux
55- 56 I2 --- r_Flux ? Reference for CH3OH data (3)
59- 64 F6.2 km/s Vlsr2 ? CS(2-1) LSR velocity
66- 70 F5.2 K TA ? CS(2-1) antenne temperature
71 A1 --- n_TA [d] Note (2)
73- 74 I2 --- r_TA ? Reference for CS(2-1) data (3)
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Note (1): For NGC 6334 F, there were no position in the original table.
The position presented is from Simbad and added by CDS.
Note (2): Note from Larionov et al. (1999A&AS..139..257L 1999A&AS..139..257L) data not
explained in their paper.
Note (3): References as follows:
9 = 1994MNRAS.268..464S 1994MNRAS.268..464S Slysh et al.
10 = 1990A&A...240..116B 1990A&A...240..116B Bachiller et al.
11 = 1990ApJ...354..556H 1990ApJ...354..556H Haschick et al.
12 = 1992AZh....69.1002K 1992AZh....69.1002K Kalenskij et al.
13 = 2004ApJS..155..149K 2004ApJS..155..149K Kurtz et al. Cat. J/ApJS/155/149
14 = 1999A&AS..139..257L 1999A&AS..139..257L Larionov et al.
15 = 1996A&AS..115...81B 1996A&AS..115...81B Bronfman et al. Cat. J/A+AS/115/81
16 = 1996A&AS..118..191J 1996A&AS..118..191J Juvela Cat. J/A+AS/118/191
17 = 1992ApJS...78..505P 1992ApJS...78..505P Plume et al.
18 = 1996ApJ...463..205A 1996ApJ...463..205A Anglada et al. Cat. J/ApJ/463/205
19 = 1989ApJ...342L..87S 1989ApJ...342L..87S Sugitani et al.
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History:
From electronic version of the journal
(End) Veta Avedisova [INASAN], Patricia Vannier [CDS] 07-Apr-2008