2011A&A...530A..53K


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.24CET02:18:18

2011A&A...530A..53K - Astronomy and Astrophysics, volume 530A, 53-53 (2011/6-1)

High resolution CO observation of massive star forming regions.

KLAASSEN P.D., WILSON C.D., KETO E.R., ZHANG Q., GALVAN-MADRID R. and LIU H.-Y.B.

Abstract (from CDS):

To further understand the processes involved in the formation of massive stars, we have undertaken a study of the gas dynamics surrounding three massive star forming regions. By observing the large scale structures at high resolution, we are able to determine properties such as driving source, and spatially resolve the bulk dynamical properties of the gas such as infall and outflow. With high resolution observations, we are able to determine which of the cores in a cluster forming massive stars is responsible for the large scale structures. We present CO observations of three massive star forming regions with known HII regions and show how the CO traces both infall and outflow. By combining data taken in two SMA configurations with JCMT observations, we are able to see large scale structures at high resolution. We find large (0.26-0.40pc), massive (2-3M) and energetic (13-17x1044erg) outflows emanating from the edges of two HII regions suggesting they are being powered by the protostar(s) within. We find infall signatures in two of our sources with mass infall rates of order 10–4M/yr. We suggest that star formation is ongoing in these sources despite the presence of HII regions. We further conclude that the source(s) within a single HII region are responsible for the observed large scale structures; that these large structures are not the net effect of multiple outflows from multiple HII regions and hot cores.

Abstract Copyright:

Journal keyword(s): stars: massive - stars: protostars - ISM: jets and outflows - ISM: kinematics and dynamics - submillimeter: ISM - HII regions

CDS comments: Table 2 calibrator 1944-201 not in Simbad. Paragraph 2 calibrator 3C 454.5 not in Simbad.

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 7C 0059+5808 QSO 01 02 45.76238248 +58 24 11.1366009   20.09 19.22 18.57 17.90 ~ 194 1
2 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5389 1
3 QSO B1730-130 QSO 17 33 02.70578476 -13 04 49.5481484   18 18.5 18.78 17.39 ~ 999 1
4 GAL 005.88-00.41 HII 18 00 30.388 -24 04 00.20           ~ 303 0
5 W 31c HII 18 10 29.1 -19 56 05           ~ 306 0
6 GAL 019.61-00.23 HII 18 27 38.0 -11 56 42           ~ 140 0
7 QSO B1830-211 QSO 18 33 39.92 -21 03 39.9     18.70 21   ~ 563 1
8 GAL 024.78+00.08 HII 18 36.2 -07 13           ~ 75 0
9 GAL 028.20-00.04 HII 18 42 58.2 -04 14 05           ~ 52 0
10 GAL 029.96-00.02 Y*O 18 46 03.7 -02 39 21           ~ 336 1
11 IRAS 18449-0115 cor 18 47 34.4947 -01 12 40.269           ~ 319 0
12 [WBN74] W 51 IRS 2 SFR 19 23 40.05 +14 31 07.1           ~ 256 0
13 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 2030 1
14 3C 454.0 QSO 22 51 34.7283285659 +18 48 40.085907101   18.52 18.4     ~ 213 2
15 [WBN74] NGC 7538 IRS 3 Y*? 23 13 43.646 +61 28 14.02           ~ 64 0
16 [WBN74] NGC 7538 IRS 1 Y*O 23 13 45.318 +61 28 11.69           ~ 371 3
17 [WBN74] NGC 7538 IRS 2 Y*? 23 13 45.474 +61 28 19.87           ~ 72 0

    Equat.    Gal    SGal    Ecl

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2021.01.24-02:18:18

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