2010A&A...521L..58H


C.D.S. - SIMBAD4 rel 1.7 - 2019.08.20CEST13:04:49

2010A&A...521L..58H - Astronomy and Astrophysics, volume 521, L58-58 (2010/10-1)

A candidate protostellar object in the L 1457/MBM 12 cloud.

HEITHAUSEN A. and BOETTNER C.

Abstract (from CDS):

The association of young TTauri stars, MBM12A, indicates that L1457 was forming stars not too long ago. With our study we want to find out whether there are still signs of ongoing star formation in that cloud. Using the Max-Planck-Millimeter-Bolometer MAMBO at the IRAM 30m telescope, we obtained a map of about 8'x8' centered on L1457 in the dust continuum emission at 230GHz. Towards the most intense regions in our bolometer map, we obtained spectra at high angular resolution in the CS (2-1) and the N2H+ (1-0) lines using the IRAM 30m telescope. We find that the cold dust in L1457 is concentrated in several small cores with high H2 column densities and solar masses. The density profiles of the cores are inconsistent with a sphere with constant density. These cores are closer to virial equilibrium than is the cloud as a whole. Data from the VLA and Spitzer archives reveal two point sources in the direction of one dust core. One of the sources is probably a distant quasar, whereas the other source is projected right on a local maximum of our dust map and shows characteristics of a protostellar object.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: abundances - ISM: molecules - stars: formation

Nomenclature: Fig. 1, Table 1: [HB2010b] L 1457-AN (Nos A-C, C1). Table 3: [HB2010b] J025616+192703 N=1.

Simbad objects: 13

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Number of rows : 13

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 NAME Polaris Cirrus Cloud MoC 01 52 29.6 +87 40 31           ~ 68 0
2 LDN 1457 DNe 02 55.9 +19 35           ~ 81 1
3 NAME MBM 12 Association As* 02 56.0 +19 32           ~ 15 0
4 [HB2010b] L 1457-A mm 02 56 00.6 +19 26 17           ~ 1 0
5 [HB2010b] L 1457-B mm 02 56 07.0 +19 27 10           ~ 1 0
6 V* XY Ari DQ* 02 56 08.185 +19 26 34.12           ~ 134 1
7 [HB2010b] L 1457-C mm 02 56 13.5 +19 27 30           ~ 1 0
8 [HB2010b] J025616+192703 Rad 02 56 16.0 +19 27 03           ~ 1 0
9 [GTP2000] VLA B0253+192 Rad 02 56 16.32 +19 26 48.8           ~ 2 0
10 [HB2010b] L 1457-C1 mm 02 56 17.2 +19 27 04           ~ 1 0
11 MBM 12 MoC 02 56 50 +19 32.0           ~ 210 1
12 IRAS 04191+1523 Y*O 04 22 00.439 +15 30 21.21           ~ 180 0
13 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3272 0

    Equat.    Gal    SGal    Ecl

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2019.08.20-13:04:49

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