2017ApJ...850...54C

Query : 2017ApJ...850...54C

2017ApJ...850...54C - Astrophys. J., 850, 54-54 (2017/November-3)

ALMA CO(3-2) observations of star-forming filaments in a gas-poor dwarf spheroidal galaxy.

CONSIGLIO S.M., TURNER J.L., BECK S., MEIER D.S., SILICH S. and ZHAO J.-H.

Abstract (from CDS):

We report ALMA observations of 12CO(3-2) and 13CO(3-2) in the gas-poor dwarf galaxy NGC 5253. These 0.''3(5.5 pc) resolution images reveal small, dense molecular gas clouds that are located in kinematically distinct extended filaments. Some of the filaments appear to be falling into the galaxy and may be fueling its current star formation. The most intense CO(3-2) emission comes from the central ∼100 pc region centered on the luminous radio-infrared H II region known as the supernebula. The CO(3-2) clumps within the starburst region are anti-correlated with Hα on ∼5 pc scales, but are well-correlated with radio free-free emission. Cloud D1, which enshrouds the supernebula, has a high 12CO/13CO ratio, as does another cloud within the central 100 pc starburst region, possibly because the clouds are hot. CO(3-2) emission alone does not allow determination of cloud masses as molecular gas temperature and column density are degenerate at the observed brightness, unless combined with other lines such as 13CO.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: dwarf - galaxies: individual: NGC 5253 - galaxies: starburst - galaxies: star clusters: general - submillimeter: galaxies - submillimeter: galaxies

Nomenclature: Fig. 5, Table 1: [CTB2017] DN (Nos D1-D7).

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 UGCA 116 AGN 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 561 0
2 [MTB2002] E MoC 13 39 55.5 -31 38 18           ~ 3 0
3 [CTB2017] D5 MoC 13 39 55.79 -31 38 25.6           ~ 1 0
4 [MTB2002] F MoC 13 39 55.8 -31 38 31           ~ 3 0
5 [CTB2017] D6 MoC 13 39 55.88 -31 38 27.0           ~ 1 0
6 [CTB2017] D4 MoC 13 39 55.91 -31 38 25.0           ~ 4 0
7 [CTB2017] D1 MoC 13 39 55.965 -31 38 24.36           ~ 10 0
8 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
9 [MTB2002] D MoC 13 39 56.0 -31 38 26           ~ 10 0
10 [CTB2017] D7 MoC 13 39 56.002 -31 38 26.93           ~ 2 0
11 [CTB2017] D3 MoC 13 39 56.03 -31 38 22.9           ~ 2 0
12 [CTB2017] D2 MoC 13 39 56.12 -31 38 23.1           ~ 1 0
13 [MTB2002] C MoC 13 39 56.6 -31 38 32           ~ 4 0
14 QSO B1339-287 Bla 13 42 15.34562925 -29 00 41.8314826     19.5 19.2   ~ 42 1
15 QSO B1424-41 Bla 14 27 56.29756617 -42 06 19.4376238   18.48 17.7 16.30   ~ 547 1

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