2006A&A...454L..95W


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST05:40:53

2006A&A...454L..95W - Astronomy and Astrophysics, volume 454, L95-98 (2006/8-1)

Mid- and high-J CO observations towards ultracompact HII regions.

WYROWSKI F., HEYMINCK S., GUESTEN R. and MENTEN K.M.

Abstract (from CDS):

A study of 12 ultracompact HII regions was conducted to probe the physical conditions and kinematics in the inner envelopes of the molecular clumps harboring them. The APEX telescope was used to observe the sources in the CO(4-3) and 13CO(8-7) lines. Line intensities were modeled with the RATRAN radiative transfer code using power laws for the density and temperature to describe the physical structure of the clumps. All sources were detected in both lines. The optically thick CO(4-3) line shows predominantly blue skewed profiles reminiscent of infall. Line intensities can be reproduced well using the physical structure of the clumps taken from the literature. The optically thick line profiles show that CO is a sensitive tracer of ongoing infall in the outer envelopes of clumps harboring ultracompact HII regions and hot molecular cores.

Abstract Copyright:

Journal keyword(s): stars: formation - ISM: clouds - ISM: kinematics and dynamics - ISM: structure - radio lines: ISM - submillimeter

Simbad objects: 14

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Number of rows : 14

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 GAL 005.88-00.41 HII 18 00 30.388 -24 04 00.20           ~ 296 0
2 GAL 009.62+00.19 HII 18 06 13.9 -20 31 44           ~ 186 0
3 GAL 010.47+00.03 HII 18 08 38.4 -19 51 52           ~ 109 0
4 W 31c HII 18 10 29.1 -19 56 05           ~ 301 0
5 IRAS 18097-1825A cor 18 12 40.3094 -18 24 20.782           ~ 45 0
6 GAL 029.96-00.02 Y*O 18 46 03.7 -02 39 21           ~ 331 1
7 IRAS 18449-0115 cor 18 47 34.4947 -01 12 40.269           ~ 312 0
8 OH 34.26 +0.15 SFR 18 53 18.54 +01 14 57.9           ~ 460 0
9 GAL 035.20-01.74 Y*O 19 01 47.0 +01 13 08           ~ 71 1
10 Caswell OH 045.12+00.13 HII 19 13 27.845 +10 53 36.74           ~ 111 0
11 [WBN74] W 51 IRS 2 SFR 19 23 40.05 +14 31 07.1           ~ 253 0
12 NAME W 51 IRS 1 PoC 19 23 41.9 +14 30 36           ~ 96 0
13 W 51e1 Rad 19 23 43.77 +14 30 25.9           ~ 115 0
14 W 51e2 Rad 19 23 43.90 +14 30 34.8           ~ 180 0

    Equat.    Gal    SGal    Ecl

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2020.07.10-05:40:53

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