2010A&A...522L...1C


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.30CET03:01:38

2010A&A...522L...1C - Astronomy and Astrophysics, volume 522, L1-1 (2010/11-1)

Heavy water around the L1448-mm protostar.

CODELLA C., CECCARELLI C., NISINI B., BACHILLER R., CERNICHARO J., GUETH F., FUENTE A. and LEFLOCH B.

Abstract (from CDS):

L1448-mm is the prototype of a low-mass Class 0 protostar driving a high-velocity jet. Given its bright H2O spectra observed with ISO, L1448-mm is an ideal laboratory to observe heavy water (HDO) emission. Our aim is to image the HDO emission in the protostar surroundings, the possible occurrence of HDO emission also investigating off L1448-mm, towards the molecular outflow. We carried out observations of L1448-mm in the HDO(110-111) line at 80.6GHz, an excellent tracer of HDO column density, with the IRAM Plateau de Bure Interferometer. We image for the first time HDO emission around L1448-mm. The HDO structure reveals a main clump at velocities close to the ambient one towards the the continuum peak that is caused by the dust heated by the protostar. In addition, the HDO map shows tentative weaker emission at ≃2000AU from the protostar towards the south, which is possibly associated with the walls of the outflow cavity opened by the protostellar wind. Using an LVG code, modelling the density and temperature profile of the hot-corino, and adopting a gas temperature of 100K and a density of 1.5x108cm-3, we derive a beam diluted HDO column density of ∼7x1013cm-2, corresponding to a HDO abundance of ∼4x10–7. In addition, the present map supports the scenario where HDO can be efficiently produced in shocked regions and not uniquely in hot corinos heated by the newly born star.

Abstract Copyright:

Journal keyword(s): ISM: individual objects: L1448 - ISM: molecules - stars: formation

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B0130-17 QSO 01 32 43.48746261 -16 54 48.5218416   18.75 18.44 15.44   ~ 186 1
2 4C 28.07 QSO 02 37 52.40567732 +28 48 08.9900231     18.5 16.99   ~ 510 1
3 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3582 3
4 LDN 1448 DNe 03 22.5 +30 35           ~ 469 0
5 [SDA2014] West4 Y*O 03 25 38.83 +30 44 06.2           ~ 242 1
6 IRAS F03226+3033 Y*O 03 25 38.83 +30 44 06.2           ~ 304 0
7 [JCC87] IRAS 4B Y*O 03 29 12.058 +31 13 02.05           ~ 562 0
8 4C 32.14 QSO 03 36 30.10760600 +32 18 29.3422210     17.50 16.6   ~ 584 1
9 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1058 1
10 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2528 2

    Equat.    Gal    SGal    Ecl

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2020.10.30-03:01:38

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