2012A&A...544L...7P

Query : 2012A&A...544L...7P

2012A&A...544L...7P - Astronomy and Astrophysics, volume 544L7-7 (2012/8-1)

The first ALMA view of IRAS 16293-2422. Direct detection of infall onto source B and high-resolution kinematics of source A.

PINEDA J.E., MAURY A.J., FULLER G.A., TESTI L., GARCIA-APPADOO D., PECK A.B., VILLARD E., CORDER S.A., VAN KEMPEN T.A., TURNER J.L., TACHIHARA K. and DENT W.

Abstract (from CDS):

We focus on the kinematical properties of a proto-binary to study the infall and rotation of gas toward its two protostellar components. We present ALMA Science Verification observations with high-spectral resolution of IRAS 16293-2422 at 220.2GHz. The wealth of molecular lines in this source and the very high spectral resolution offered by ALMA allow us to study the gas kinematics with unprecedented detail. We present the first detection of an inverse P-Cygni profile toward source B in the three brightest lines. The line profiles are fitted with a simple two-layer model to derive an infall rate of 4.5x10–5M_☉/yr. This infall detection would rule-out the previously suggested possibility that source B is a T Tauri star. A position velocity diagram for source A shows evidence of rotation with an axis close to the line-of-sight.

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Journal keyword(s): ISM: individual objects: IRAS 16293-2422 - ISM: clouds - stars: formation - ISM: molecules

VizieR on-line data: <Available at CDS (J/A+A/544/L7): list.dat fits/*>

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 - 2026 		#notes
1 QSO B1622-253 Bla 16 25 46.89164287 -25 27 38.3268734   21.3 20.6 19.60   ~ 381 1
2 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
3 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1357 1
4 NAME IRAS 16293-2422B Y*O 16 32 22.63 -24 28 31.8           ~ 352 0
5 [W89] A2 Rad 16 32 22.866 -24 28 35.90           ~ 37 0
6 NAME IRAS 16293-2422A Y*O 16 32 22.869 -24 28 36.11           ~ 207 0
7 [W89] Aa smm 16 32 22.8721 -24 28 36.331           ~ 8 0
8 [W89] A1 Rad 16 32 22.887 -24 28 35.67           ~ 39 0
9 [W89] Ab smm 16 32 22.9060 -24 28 35.885           ~ 8 0
10 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 918 1

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