J/MNRAS/416/178 1.2-mm dust clumps with luminous water masers (Breen+, 2011)
Constraining the properties of 1.2-mm dust clumps that contain luminous
water masers.
Breen S.L., Ellingsen S.P.
<Mon. Not. R. Astron. Soc., 416, 178-204 (2011)>
=2011MNRAS.416..178B 2011MNRAS.416..178B
ADC_Keywords: Molecular clouds ; Radio lines ; Masers
Keywords: masers - stars: formation - ISM: molecules - radio lines: ISM
Abstract:
We have conducted a sensitive water maser search with the Australia
Telescope Compact Array towards 267 1.2-mm dust clumps presented in
the literature. We combine our new observations with previous water
maser observations to extend our sample to 294 1.2-mm dust clumps,
towards which we detect 165 distinct water maser sites towards 128
1.2-mm dust clumps. Within the fields of our observations, we
additionally find four water masers with no apparent associated 1.2-mm
dust continuum emission. Our overall detection rate of 44 per cent
appears to vary as a function of Galactic longitude. We find that
there is an excellent correspondence between the locations of the
detected water masers with the peak of the target 1.2-mm dust clump
sources. As expected from previous similar studies, the water masers
are chiefly detected towards the bigger, brighter and more massive
1.2-mm dust clumps.
Description:
The feasibility of this study was tested with observations using the
University of Tasmania's 26-m Mount Pleasant radio telescope. All 404
1.2-mm dust clumps given in Hill et al. (2005, Cat. J/MNRAS/363/405)
were targeted in these observations during 2007.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 150 331 Target 1.2-mm dust clumps, probability of water
maser association, followed by a description of the
water maser observations including any detections
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See also:
J/MNRAS/363/405 : SIMBA observations of cold cores (Hill+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Clump 1.2mm dust clump name (l, b) [HBM2005] (1)
17- 18 I2 h RAh 1.2mm dust clump right ascension (J2000) (1)
20- 21 I2 min RAm 1.2mm dust clump right ascension (J2000)
23- 26 F4.1 s RAs 1.2mm dust clump right ascension (J2000)
28 A1 --- DE- 1.2mm dust clump declination sign (J2000) (1)
29- 30 I2 deg DEd 1.2mm dust clump declination (J2000)
32- 33 I2 arcmin DEm 1.2mm dust clump declination (J2000)
35- 36 I2 arcsec DEs 1.2mm dust clump declination (J2000)
38- 44 E7.2 --- Prob Calculated probability of water maser
presence (2)
46- 54 A9 --- Inst Array and epoch (3)
56- 70 A15 --- Maser Water maser name (l, b), [HBM2005]
72- 73 I2 h RA1h ? 1.2mm dust clump right ascension (J2000)
75- 76 I2 min RA1m ? 1.2mm dust clump right ascension (J2000)
78- 82 F5.2 s RA1s ? 1.2mm dust clump right ascension (J2000)
84 A1 --- DE1- ? 1.2mm dust clump declination sign (J2000)
85- 86 I2 deg DE1d ? 1.2mm dust clump declination (J2000)
88- 89 I2 arcmin DE1m ? 1.2mm dust clump declination (J2000)
91- 94 F4.1 arcsec DE1s ? 1.2mm dust clump declination (J2000)
96- 97 I2 arcsec Sep ? Separation between water maser and 1.2-mm
dust clump peak
98 A1 --- n_Sep [*] * no dust clump reported at this position
100 A1 --- l_Sp Limit flag for 5σ limit on Sp
101-108 F8.3 Jy Sp Water maser peak flux density or 5σ
detection limit
110-115 F6.1 km/s Vp ? Velocity of the water maser peak emission
117-121 I5 km/s Vr1 ? Velocity range of either the detected
emission or the observed velocity range if
no detection
122 A1 --- --- [,]
123-126 I4 km/s Vr2 ? Velocity range of either the detected
emission or the observed velocity range if
no detection
128-133 F6.1 Jy.km/s Int ? Integrated flux density of the water maser
emission
135-150 A16 --- Notes Notes (4)
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Note (1): from Hill et al. 2005, Cat. J/MNRAS/363/405.
Note (2): using the model derived by Breen et al. 2007MNRAS.377..491B 2007MNRAS.377..491B.
Note (3): gives information about the ATCA array configuration used in the water
maser observations followed by the epoch.
H75 = 2007 October 9, 10,
H214 = 2007 December 7,
H214 = 2008 July 12, 13,
6B = 2008 August 15, 16, 17.
In some cases, data are taken from Breen et al. (2010MNRAS.406.1487B 2010MNRAS.406.1487B), which
are marked with a `BCEP' followed by the year of the observations. This format
is also followed for sources taken from Caswell & Breen (2010MNRAS.407.2599C 2010MNRAS.407.2599C)
(CB) and Forster & Caswell (1989A&A...213..339F 1989A&A...213..339F) (FC).
Note (4): Presents notes related to the sources, which in most cases are further
discussed in Section 3.1. Note the following abbreviations: BS(RS) indicates
that the source is dominated by a blueshifted (redshifted) feature.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 03-Mar-2012