2011A&A...525A..72F


Query : 2011A&A...525A..72F

2011A&A...525A..72F - Astronomy and Astrophysics, volume 525A, 72-72 (2011/1-1)

Infall, outflow, and rotation in the G19.61-0.23 hot molecular core.

FURUYA R.S., CESARONI R. and SHINNAGA H.

Abstract (from CDS):

We carried out sub-arcsecond resolution observations towards the high-mass star formation region G19.61-0.23, in both continuum and molecular line emission. While the centimeter continuum images, representing ultra compact HII regions, will be discussed in detail in a forthcoming paper, here we focus on the (sub)mm emission, devoting special attention to the hot molecular core (HMC). A set of multi wavelength continuum and molecular line emission data between 6cm and 890µm were obtained with the Very Large Array, Nobeyama Millimeter Array, Owens Valley Radio Observatory millimeter array, and Submillimeter Array (SMA). These data were analyzed in conjunction with previously published data. Our SMA observations resolve the HMC into three cores whose masses are on the order of 101-103M. No submm core exhibits detectable free-free emission in the centimeter regime, but appear to be associated with masers and thermal line emission from complex organic molecules. Towards the most massive core, SMA1, the CH3CN (18K-17K) lines provide hints of rotation about the axis of a jet/outflow traced by H2O maser and H13CO+(1-0) line emission. Inverse P-Cygni profiles of the 13CO (3-2) and C18O (3-2) lines seen towards SMA1 indicate that the central high-mass (proto)star(s) is (are) still gaining mass with an accretion rate ≥3x10–3M/yr. Owing to the linear scales and high accretion rate, we hypothesize that we are observing an accretion flow towards a star cluster in the making, rather than towards a single massive star.

Abstract Copyright:

Journal keyword(s): stars: early-type - evolution - HII regions - ISM: jets and outflows - ISM: individual objects: G19.61-0.23 - submillimeter: ISM

Nomenclature: Table 3 : [FCS2011] SMAN (Nos SMA1-SMA3) N=3

Simbad objects: 19

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Number of rows : 19
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2835 2
2 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1636 1
3 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5833 2
4 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4383 2
5 QSO B1730-130 QSO 17 33 02.70578907 -13 04 49.5482119   18 19.50 18.78 17.39 ~ 1149 1
6 QSO B1741-038 QSO 17 43 58.85613537 -03 50 04.6167326     20.40 17.98   ~ 556 1
7 [HC96] G19.61-0.23 5 Mas 18 27 37.447 -11 56 38.26           ~ 2 0
8 [HC96] G19.61-0.23 4 Mas 18 27 37.644 -11 56 41.20           ~ 2 0
9 [HC96] G19.61-0.23 6 Mas 18 27 37.891 -11 56 37.06           ~ 3 0
10 AGAL G019.609-00.234 cor 18 27 38 -11 56.6           ~ 27 0
11 [FCS2011] SMA3 cor 18 27 37.955 -11 56 35.08           ~ 2 0
12 GAL 019.61-00.23 HII 18 27 38.0 -11 56 42           ~ 158 0
13 [HC96] G19.61-0.23 2 Mas 18 27 38.011 -11 56 36.50           ~ 2 0
14 [FCS2011] SMA2 cor 18 27 38.021 -11 56 38.75           ~ 2 0
15 [FCS2011] SMA1 cor 18 27 38.069 -11 56 37.30           ~ 2 0
16 [HC96] G19.61-0.23 3 Mas 18 27 38.202 -11 56 37.66           ~ 2 0
17 PMN J1832-1028 Rad 18 32 11.4 -10 28 13           ~ 12 0
18 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 881 1
19 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2873 2

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