2012A&A...537A.149D


C.D.S. - SIMBAD4 rel 1.7 - 2019.07.15CEST23:10:46

2012A&A...537A.149D - Astronomy and Astrophysics, volume 537A, 149-149 (2012/1-1)

NGC 3503 and its molecular environment.

DURONEA N.U., VASQUEZ J., CAPPA C.E., CORTI M. and ARNAL E.M.

Abstract (from CDS):

We present a study of the molecular gas and interstellar dust distribution in the environs of the HII region NGC3503 associated with the open cluster Pis17 with the aim of investigating the spatial distribution of the molecular gas linked to the nebula and achieving a better understanding of the interaction of the nebula and Pis17 with their molecular environment. We based our study on 12CO(1-0) observations of a region of ∼0.6deg in size obtained with the 4-m NANTEN telescope, unpublished radio continuum data at 4800 and 8640MHz obtained with the ATCA telescope, radio continuum data at 843MHz obtained from SUMSS, and available IRAS, MSX, IRAC-GLIMPSE, and MIPSGAL images. We found a molecular cloud (Component 1) having a mean velocity of -24.7km/s, compatible with the velocity of the ionized gas, which is associated with the nebula and its surroundings. Adopting a distance of 2.9±0.4kpc, the total molecular mass yields (7.6± 2.1)x103M and density yields 400±240cm–3. The radio continuum data confirm the existence of an electron density gradient in NGC3503. The IR emission shows a PDR bordering the higher density regions of the nebula. The spatial distribution of the CO emission shows that the nebula coincides with a molecular clump, and the strongest CO emission peak is located close to the higher electron density region. The more negative velocities of the molecular gas (about -27 km/s), are coincident with NGC3503. Candidate young stellar objects (YSOs) were detected toward the Hiiregion, suggesting that embedded star formation may be occurring in the neighborhood of the nebula. The clear electron density gradient, along with the spatial distribution of the molecular gas and PAHs in the region indicates that NGC3503 is a blister-type Hii region that has probably undergone a champagne phase.

Abstract Copyright:

Journal keyword(s): ISM: molecules - ISM: clouds - radio continuum: ISM - HII regions - photon-dominated region (PDR) - ISM: kinematics and dynamics

Nomenclature: Fig. 7, Paragr. 3.2: [DVC2012] G289.49+00.15 N=1.

Simbad objects: 36

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Number of rows : 36

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 LBN 119.57-00.92 HII 00 21 16 +61 43.5           ~ 36 0
2 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 1915 1
3 SH 2-305 HII 07 30 04.1 -18 32 13           ~ 49 0
4 SH 2-307 HII 07 35 34.17 -18 45 35.0           ~ 58 2
5 IC 2599 HII 10 37.7 -58 39           ~ 31 2
6 GUM 34a HII 10 58.0 -59 42           ~ 3 0
7 SFO 61 Cld 11 00 13.5 -59 36 09           ~ 6 1
8 Cl Pismis 17 OpC 11 01 04 -59 49.1   9.63 9.4     ~ 42 0
9 MSX6C G289.4859+00.1420 Y*? 11 01 13.7 -59 49 16           ~ 1 0
10 2MASS J11011390-5949099 Y*? 11 01 13.907 -59 49 09.95           ~ 1 0
11 SFO 62 Cld 11 01 15.8 -59 51 01           ~ 8 0
12 MSX6C G289.4993+00.1231 Y*? 11 01 15.8 -59 50 38           ~ 1 0
13 IRAS 10591-5934 IR 11 01 15.8 -59 51 01           ~ 12 1
14 NGC 3503 RNe 11 01 15.9 -59 50 39           ~ 19 1
15 MSX6C G289.5051+00.1161 Y*? 11 01 17.0 -59 51 10           ~ 1 0
16 [DVC2012] G289.49+00.15 Rad 11 01.3 -59 49           ~ 1 0
17 2MASS J11011933-5950037 Y*? 11 01 19.339 -59 50 03.77           ~ 1 0
18 2MASS J11011934-5949422 Y*? 11 01 19.3395550645 -59 49 42.277694843           ~ 1 0
19 2MASS J11012021-5949123 Y*? 11 01 20.219 -59 49 12.34           ~ 1 0
20 2MASS J11012238-5952449 Y*? 11 01 22.3802159705 -59 52 44.937759067           ~ 1 0
21 2MASS J11012329-5949269 Y*? 11 01 23.294 -59 49 26.95           ~ 1 0
22 2MASS J11013238-5949339 Y*? 11 01 32.385 -59 49 33.97           ~ 1 0
23 2MASS J11013263-5951140 Y*? 11 01 32.635 -59 51 14.04           ~ 1 0
24 HD 305842 *iC 11 01 35.2359236850 -59 46 42.494905586   10.41 10.27     B5 6 0
25 2MASS J11013591-5951037 Y*? 11 01 35.920 -59 51 03.76           ~ 1 0
26 BRAN 337 HII 11 02 56.1 -59 29 16           ~ 17 0
27 GUM 34b HII 11 03.2 -59 32           ~ 6 0
28 SFO 63 Cld 11 03 18.8 -59 48 01           ~ 6 0
29 HD 97151 Be* 11 10 02.3357520808 -60 05 42.491000193 6.81 7.63 7.72     B2Ve 40 0
30 NGC 3576 HII 11 11 49.8 -61 18 14           ~ 221 2
31 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 975 1
32 SH 2-4 HII 17 18 23.9 -39 19 10           ~ 82 4
33 BFS 65 HII 17 20 05.8 -38 57 37           ~ 72 0
34 NGC 6357 HII 17 26.5 -34 12           ~ 242 0
35 [CPA2006] N10 bub 18 14 06.2 -17 28 31           ~ 18 0
36 [CPA2006] N21 bub 18 25 31.8 -13 16 26           ~ 19 0

    Equat.    Gal    SGal    Ecl

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2019.07.15-23:10:46

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