2011A&A...534A.100J


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.10CET16:51:51

2011A&A...534A.100J - Astronomy and Astrophysics, volume 534A, 100-100 (2011/10-1)

Arcsecond resolution images of the chemical structure of the low-mass protostar IRAS 16293-2422. An overview of a large molecular line survey from the submillimeter array.

JORGENSEN J.K., BOURKE T.L., NGUYEN LUONG Q. and TAKAKUWA S.

Abstract (from CDS):

It remains a key challenge to establish the molecular content of different components of low-mass protostars, like their envelopes and disks, and how this depends on the evolutionary stage and/or environment of the young stars. Observations at submillimeter wavelengths provide a direct possibility to study the chemical composition of low-mass protostars through transitions probing temperatures up to a few hundred K in the gas surrounding these sources. This paper presents a large molecular line survey of the deeply embedded protostellar binary IRAS 16293-2422 from the Submillimeter Array (SMA) - including images of individual lines down to ≃1.5-3'' (190-380AU) resolution. More than 500 individual transitions are identified related to 54 molecular species (including isotopologues) probing temperatures up to about 550K. Strong chemical differences are found between the two components in the protostellar system with a separation between, in particular, the sulfur- and nitrogen-bearing species and oxygen-bearing complex organics. The action of protostellar outflow on the ambient envelope material is seen in images of CO and SiO and appear to influence a number of other species, including (deuterated) water, HDO. The effects of cold gas-phase chemistry is directly imaged through maps of CO, N2D+ and DCO+, showing enhancements of first DCO+ and subsequently N2D+ in the outer envelope where CO freezes-out on dust grains.

Abstract Copyright:

Journal keyword(s): circumstellar matter - ISM: molecules - stars: formation - ISM: jets and outflows - submillimeter: ISM - ISM: individual objects: IRAS 16293-2422

Simbad objects: 5

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Number of rows : 5

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 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2944 0
2 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1003 1
3 NAME IRAS 16293-2422B Y*O 16 32 22.63 -24 28 31.8           ~ 163 0
4 NAME IRAS 16293-2422A Y*O 16 32 22.869 -24 28 36.11           ~ 98 0
5 QSO B1741-038 QSO 17 43 58.85613396 -03 50 04.6166450     18.5 17.98   ~ 467 1

    Equat.    Gal    SGal    Ecl

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2019.12.10-16:51:51

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