1999ApJ...514L..43W


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.28CET08:27:38

1999ApJ...514L..43W - Astrophys. J., 514, L43-L46 (1999/March-3)

Hot gas and dust in a protostellar cluster near W3(OH).

WYROWSKI F., SCHILKE P., WALMSLEY C.M. and MENTEN K.M.

Abstract (from CDS):

We used the IRAM interferometer to obtain subarcsecond resolution observations of the high-mass star-forming region W3(OH) and its surroundings at a frequency of 220 GHz. With the improved angular resolution, we distinguish three peaks in the thermal dust continuum emission originating from the hot core region ~6" (0.06 pc) east of W3(OH). The dust emission peaks are coincident with known radio continuum sources, one of which is of nonthermal nature. The latter source is also at the center of expansion of a powerful bipolar outflow observed in H2O maser emission. We determine the hot core mass to be 15 M based on the integrated dust continuum emission. Simultaneously, many molecular lines are detected, allowing the analysis of the temperature structure and the distribution of complex organic molecules in the hot core. From HNCO lines spanning a wide range of excitation, two 200 K temperature peaks are found coincident with dust continuum emission peaks, suggesting embedded heating sources within them.

Abstract Copyright:

Journal keyword(s): ISM: Individual: Alphanumeric: W3(OH) - ISM: Molecules - Radio Continuum: ISM - Stars: Formation - Techniques: Interferometric

Nomenclature: Table 1: [WSW99] A (Nos A-C).

Simbad objects: 11

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Number of rows : 11

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 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 950 2
2 [WSW99] C Rad 02 27 04.52 +61 52 24.7           ~ 6 0
3 [WSW99] B Rad 02 27 04.60 +61 52 24.8           ~ 6 0
4 [WSW99] A Rad 02 27 04.71 +61 52 24.6           ~ 6 0
5 NAME Turner-Welch Object Y*O 02 27 04.717 +61 52 24.73           ~ 31 0
6 4C 67.05 QSO 02 28 50.05148948 +67 21 03.0293039   19.5   18.1   ~ 234 1
7 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3604 3
8 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5392 1
9 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 715 0
10 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2549 2
11 NAME Cepheus A SFR 22 56 17.9 +62 01 49           ~ 703 2

    Equat.    Gal    SGal    Ecl

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