2012A&A...543A..65M


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.16CEST10:00:38

2012A&A...543A..65M - Astronomy and Astrophysics, volume 543A, 65-65 (2012/7-1)

A spectral line survey of the starless and proto-stellar cores detected by BLAST toward the Vela-D molecular cloud.

MORALES ORTIZ J.L., OLMI L., BURTON M., DE LUCA M., ELIA D., GIANNINI T., LORENZETTI D., MASSI F. and STRAFELLA F.

Abstract (from CDS):

Starless cores represent a very early stage of the star formation process, before collapse results in the formation of a central protostar or a multiple system of protostars. We use spectral line observations of a sample of cold dust cores, previously detected with the BLAST telescope in the Vela-D molecular cloud, to perform a more accurate physical and kinematical analysis of the sources. We present a 3-mm and 1.3-cm survey conducted with the Mopra 22-m and Parkes 64-m radio telescopes of a sample of 40 cold dust cores, including both starless and proto-stellar sources. 20 objects were also mapped using molecular tracers of dense gas. To trace the dense gas we used the molecular species NH3, N2H+, HNC, HCO+, H13CO+, HCN and H13CN, where some of them trace the more quiescent gas, while others are sensitive to more dynamical processes. The selected cores have a wide variety of morphological types and also show physical and chemical variations, which may be associated to different evolutionary phases. We find evidence of systematic motions in both starless and proto-stellar cores and we detect line wings in many of the proto-stellar cores. Our observations probe linear distances in the sources >0.1pc, and are thus sensitive mainly to molecular gas in the envelope of the cores. In this region we do find that, for example, the radial profile of the N2H+(1-0) emission falls off more quickly than that of C-bearing molecules such as HNC(1-0), HCO+(1-0) and HCN(1-0). We also analyze the correlation between several physical and chemical parameters and the dynamics of the cores. Depending on the assumptions made to estimate the virial mass, we find that many starless cores have masses below the self-gravitating threshold, whereas most of the proto-stellar cores have masses which are near or above the self-gravitating critical value. An analysis of the median properties of the starless and proto-stellar cores suggests that the transition from the pre- to the proto-stellar phase is relatively fast, leaving the core envelopes with almost unchanged physical parameters.

Abstract Copyright:

Journal keyword(s): submillimeter: ISM - stars: formation - ISM: clouds - ISM: molecules - radio lines: ISM

VizieR on-line data: <Available at CDS (J/A+A/543/A65): cubes.dat + 51 FITS datacubes>

Simbad objects: 47

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Number of rows : 47

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 LBN 126.70-00.80 HII 01 22 58.00 +61 48 16.0           ~ 81 3
2 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 974 3
3 NGC 1333 OpC 03 29 11 +31 18.6           ~ 1258 1
4 NAME Vela-D Molecular Cloud MoC 08 39 -41.0           ~ 43 0
5 BLAST J084531-435006 cor 08 45 31.8 -43 50 06           ~ 3 0
6 BLAST J084546-432458 smm 08 45 46.6 -43 24 59           ~ 3 0
7 BLAST J084552-432152 smm 08 45 52.2 -43 21 53           ~ 3 0
8 IRAS 08442-4328 cor 08 46 06.7 -43 39 56     12.22     ~ 14 0
9 BLAST J084612-432337 smm 08 46 12.7 -43 23 38           ~ 3 0
10 IRAS 08447-4309 cor 08 46 33.2 -43 21 01           ~ 4 0
11 IRAS 08448-4343 cor 08 46 33.8 -43 54 33           ~ 59 1
12 BLAST J084637-432245 smm 08 46 37.9 -43 22 45           ~ 3 0
13 BLAST J084654-431626 smm 08 46 54.3 -43 16 26           ~ 3 0
14 BLAST J084718-432804 smm 08 47 18.5 -43 28 05           ~ 3 0
15 BLAST J084731-435344 smm 08 47 31.0 -43 53 44           ~ 3 0
16 BLAST J084735-432829 smm 08 47 35.4 -43 28 29           ~ 3 0
17 IRAS 08458-4332 IR 08 47 36.95 -43 42 55.3           ~ 6 0
18 BLAST J084738-434931 smm 08 47 38.3 -43 49 32           ~ 3 0
19 BLAST J084739-432623 smm 08 47 39.2 -43 26 24           ~ 3 0
20 BLAST J084742-434347 cor 08 47 42.3 -43 43 48           ~ 4 0
21 BLAST J084744-435045 cor 08 47 45.0 -43 50 46           ~ 3 0
22 BLAST J084749-434810 smm 08 47 50.0 -43 48 10           ~ 3 0
23 BLAST J084754-432748 cor 08 47 54.8 -43 27 48           ~ 3 0
24 BLAST J084759-433942 cor 08 47 59.2 -43 39 42           ~ 3 0
25 BLAST J084801-435108 smm 08 48 01.3 -43 51 08           ~ 3 0
26 BLAST J084803-433051 smm 08 48 03.9 -43 30 51           ~ 3 0
27 IRAS 08463-4343 cor 08 48 05.4 -43 54 15           ~ 5 0
28 BLAST J084813-423730 smm 08 48 13.5 -42 37 31           ~ 3 0
29 IRAS 08464-4335 cor 08 48 15.5 -43 47 15           ~ 5 0
30 BLAST J084822-433152 smm 08 48 22.5 -43 31 53           ~ 3 0
31 BLAST J084823-433858 smm 08 48 23.8 -43 38 59           ~ 3 0
32 BLAST J084834-435455 smm 08 48 34.2 -43 54 55           ~ 3 0
33 BLAST J084834-432430 smm 08 48 34.2 -43 24 31           ~ 3 0
34 BLAST J084842-431735 smm 08 48 42.7 -43 17 36           ~ 3 0
35 BLAST J084844-433733 smm 08 48 44.4 -43 37 34           ~ 3 0
36 BLAST J084847-425423 smm 08 48 47.3 -42 54 24           ~ 3 0
37 IRAS 08470-4321 cor 08 48 48.2 -43 32 25           ~ 42 0
38 BLAST J084910-441636 smm 08 49 10.1 -44 16 37           ~ 3 0
39 BLAST J084912-431353 smm 08 49 12.2 -43 13 54           ~ 3 0
40 IRAS 08474-4325 cor 08 49 13.272 -43 36 29.60           ~ 7 0
41 IRAS 08476-4306 cor 08 49 25.9 -43 17 10           ~ 27 0
42 IRAS 08477-4359 cor 08 49 32.3 -44 10 46           ~ 20 0
43 BLAST J084952-433808 smm 08 49 52.5 -43 38 08           ~ 3 0
44 BLAST J085033-433318 smm 08 50 33.9 -43 33 19           ~ 3 0
45 NAME VELA MOL RIDGE MoC 08 53 -45.0           ~ 137 0
46 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 351 1
47 LDN 1251 DNe 22 36.1 +75 16           ~ 99 0

    Equat.    Gal    SGal    Ecl

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2021.04.16-10:00:38

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