2016ApJ...822...52R


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST05:07:16

2016ApJ...822...52R - Astrophys. J., 822, 52-52 (2016/May-1)

A uniform catalog of molecular clouds in the Milky Way.

RICE T.S., GOODMAN A.A., BERGIN E.A., BEAUMONT C. and DAME T.M.

Abstract (from CDS):

The all-Galaxy CO survey of Dame et al. is by far the most uniform, large-scale Galactic CO survey. Using a dendrogram-based decomposition of this survey, we present a catalog of 1064 massive molecular clouds throughout the Galactic plane. This catalog contains 2.5 x 108 solar masses, or {25}_{-5.8}^{+10.7}% of the Milky Way's estimated H2 mass. We track clouds in some spiral arms through multiple quadrants. The power index of Larson's first law, the size-linewidth relation, is consistent with 0.5 in all regions-possibly due to an observational bias-but clouds in the inner Galaxy systematically have significantly (∼30%) higher linewidths at a given size, indicating that their linewidths are set in part by the Galactic environment. The mass functions of clouds in the inner Galaxy versus the outer Galaxy are both qualitatively and quantitatively distinct. The inner Galaxy mass spectrum is best described by a truncated power law with a power index of γ = -1.6 ± 0.1 and an upper truncation mass of M 0 = (1.0 ± 0.2) x 107M ☉, while the outer Galaxy mass spectrum is better described by a non-truncating power law with γ = -2.2 ± 0.1 and an upper mass of M 0 = (1.5 ± 0.5) x 106M ☉, indicating that the inner Galaxy is able to form and host substantially more massive GMCs than the outer Galaxy. Additionally, we have simulated how the Milky Way would appear in CO from extragalactic perspectives, for comparison with CO maps of other galaxies.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy: general - ISM: clouds - ISM: molecules

Status at CDS:   waiting for electronic table
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Simbad objects: 23

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Number of rows : 23

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1005 0
2 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10851 1
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9387 1
4 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5118 1
5 NAME Per Arm PoG 03 30 +45.0           ~ 1239 0
6 Barnard 1 MoC 03 33 16.3 +31 07 51           ~ 253 0
7 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3444 0
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14750 1
9 NAME Ori Complex Cld 05 35.3 -05 23           ~ 331 0
10 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1159 0
11 NAME Mon I MoC 06 35 +10.1           ~ 211 0
12 NAME Car Arm PoG 10 00 -60.0           ~ 377 1
13 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3764 4
14 NAME Nor Arm PoG 16 00 -50.0           ~ 334 0
15 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11450 0
16 NAME Aql Rift DNe 18 32 -01.0           ~ 231 1
17 NAME Sgr Arm PoG 19 00 -30.0           ~ 517 1
18 NAME Northern Coalsack DNe 20 21 +37.0           ~ 100 0
19 Ass Cyg OB 7 As* 21 08 +47.6           ~ 193 0
20 NAME Outer Arm PoG 21 48 +69.4           ~ 220 0
21 NAME Local Group GrG ~ ~           ~ 6923 0
22 NAME Galactic Bar reg ~ ~           ~ 883 0
23 NAME Sct-Cen PoG ~ ~           ~ 131 0

    Equat.    Gal    SGal    Ecl

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2020.06.02-05:07:16

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