J/MNRAS/410/1237 Red MSX survey (RMS) massive young stars (Urquhart+, 2011)
The Red MSX Source survey: distribution and properties of a sample of massive
young stars.
Urquhart J.S., Moore T.J.T., Hoare M.G., Lumsden S.L., Oudmaijer R.D.,
Rathborne J.M., Mottram J.C., Davies B., Stead J.J.
<Mon. Not. R. Astron. Soc., 410, 1237-1250 (2011)>
=2011MNRAS.410.1237U 2011MNRAS.410.1237U
ADC_Keywords: YSOs ; Infrared sources
Keywords: stars: early-type - stars: formation - ISM: clouds -
Galaxy: kinematics and dynamics
Abstract:
The Red MSX Source (RMS) survey has identified a large sample of
massive young stellar objects and ultra compact HII regions from a
sample of ∼2000 MSX and Two Micron All Sky Survey (2MASS) colour
selected sources. Using a recent catalogue of molecular clouds derived
from the Boston University-Five College Radio Astronomy Observatory
(BU-FCRAO) Galactic Ring Survey (GRS), and by applying a Galactic
scaleheight cut-off of 120pc, we solve the distance ambiguity for RMS
sources located within 18°<|l|>54°. These two steps yield
kinematic distances to 291 sources out of a possible 326, located
within the GRS longitude range. Combining distances and integrated
fluxes derived from spectral energy distributions, we estimate
luminosities to these sources and find that >90 per cent are
indicative of the presence of a massive star. We find the completeness
limit of our sample is ∼104L☉, which corresponds to a zero-age
main-sequence star with a mass of ∼12M☉. Selecting only these
sources, we construct a complete sample of 196 sources.
Description:
Parameters for the GRS cloud and RMS sources including positions,
assigned distances, distance from the Galactic mid-plane and the
Galactic centre, bolometric luminosity and cloud masses for a sample
of young massive stars located in the northern Galactic plane
(18<l<54°).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 39 15 Summary of unmatched RMS sources located within
the GRS region (Galactic Ring Survey)
table2.dat 37 829 Summary of GRS cloud parameters and RMS source
associations
table3.dat 72 326 Summary of RMS source parameters located within
the GRS longitude range
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)
J/A+A/525/A149 : Red MSX Survey (RMS): YSOs bolometric fluxes (Mottram+, 2011)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- MSX MSX name (GLLL.llll+BB.bbbb, Cat. V/114)
18 A1 --- n_MSX [abc] Individual note (1)
20- 24 F5.1 km/s VLSR ?=- LSR velocity
26- 29 F4.1 kpc Dnear ?=- Near distance
31- 34 F4.1 kpc Dfar ?=- Far distance
36- 39 F4.1 kpc RGC ?=- Galactocentric distance
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Note (1): Notes as follows:
a = Source assigned to the near distance as the far distance would imply a
source location more than four times the Galactic scaleheight from the
mid-plane and is thus unlikely
b = Source velocity lies outside the velocity range covered by the GRS
c = This source is located within ∼0.5kpc of the tangent point and has been
assigned the tangent point velocity
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- GRS GRS (Galactic Ring Survey) cloud name
15- 19 F5.1 pc Rad ?=- Radius
21- 25 F5.2 K Tex ?=- Excitation temperature
27- 30 F4.2 --- tau ?=- Optical depth
32- 35 F4.2 [Msun] logM ?=- LTE mass
37 I1 --- NRMS ?=- Number of RMS sources associated with
the cloud
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- MSX MSX name (GLLL.llll+BB.bbbb, Cat. V/114)
18 A1 --- m_MSX [A] Multiplicity index on MSX
20- 27 F8.4 deg RAdeg Right ascension in decimal degrees (J2000)
29- 36 F8.4 deg DEdeg Declination in decimal degrees (J2000)
38- 50 A13 --- GRS GRS (Galactic Ring Survey) cloud name
52- 56 F5.2 kpc Dist ?=- Kinematic distance
58- 63 F6.1 pc Zdist ?=- Height above the mid galactic plane
65- 68 F4.1 kpc RGC ?=- Galactocentric distance
70- 72 F3.1 [Lsun] logL ?=- Bolometric luminosity
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Acknowledgements:
James Urquhar, CSIRO Astronomy and Space Science, James.Urquhart(at)csiro.au
(End) Patricia Vannier [CDS] 16-Aug-2011