2009ApJ...691.1729C


Query : 2009ApJ...691.1729C

2009ApJ...691.1729C - Astrophys. J., 691, 1729-1737 (2009/February-1)

IRAM-PdBI observations of binary protostars. I. The hierarchical system SVS 13 in NGC 1333.

CHEN X., LAUNHARDT R. and HENNING T.

Abstract (from CDS):

We present millimeter (mm) interferometric observations of the young stellar object SVS 13 in NCG 1333 in the N2H+ (1-0) line and at 1.4 mm and 3 mm dust continuum, using the IRAM Plateau de Bure interferometer. The results are complemented by infrared data from the Spitzer Space Telescope. The mm dust continuum images resolve four sources (A, B, C, and VLA 3) in SVS 13. With the dust continuum images, we derive gas masses of 0.2-1.1 M for the sources. N2H+ (1-0) line emission is detected and spatially associated with the dust continuum sources B and VLA 3. The observed mean line width is ∼ 0.48 km/s and the estimated virial mass is ∼ 0.7 M. By simultaneously fitting the seven hyperfine line components of N2H+, we derive the velocity field and find a symmetric velocity gradient of ∼ 28 km/s/pc across sources B and VLA 3, which could be explained by core rotation. The velocity field suggests that sources B and VLA 3 are forming a physically bound protobinary system embedded in a common N2H+ core. Spitzer images show mid-infrared emission from sources A and C, which is spatially associated with the mm dust continuum emission. No infrared emission is detected from source B, implying that the source is deeply embedded. Based on the morphologies and velocity structure, we propose a hierarchical fragmentation picture for SVS 13 where the three sources (A, B, and C) were formed by initial fragmentation of a filamentary prestellar core, while the protobinary system (sources B and VLA 3) was formed by rotational fragmentation of a single collapsing subcore.

Abstract Copyright:

Journal keyword(s): binaries: general - ISM: individual (SVS 13, HH 7-11) - ISM: kinematics and dynamics - ISM: molecules - stars: formation

Simbad objects: 42

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Number of rows : 42
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 IRAS 03255+3103 Y*O 03 28 37.06800 +31 13 31.0044           ~ 82 1
2 [HFR2007] 55 cor 03 28 40.63 +31 17 56.5           ~ 38 1
3 HH 340 HH 03 28 45.0 +31 05 39           ~ 6 1
4 HH 13 HH 03 28 47.4 +31 07 07           ~ 10 0
5 HH 341 HH 03 28 49.99 +31 09 38.8           ~ 7 1
6 HH 343 HH 03 28 54.4 +31 05 21           ~ 7 1
7 IRAS 03258+3104 Y*O 03 28 55.30 +31 14 27.8           ~ 160 1
8 [JCC87] IRAS 2A Y*O 03 28 55.55 +31 14 36.7           ~ 420 3
9 HH 15 HH 03 28 58.840 +31 08 00.21           ~ 17 1
10 HH 12 HH 03 28 59.4 +31 20 11           ~ 118 1
11 ASR 114 Y*O 03 29 01.16520 +31 20 24.4140           ~ 73 1
12 HH 344 HH 03 29 01.7 +31 13 16           ~ 7 0
13 NAME HH 7-11 MMS 3 smm 03 29 01.964 +31 15 38.04           ~ 54 0
14 HH 11 HH 03 29 03 +31 15.8           ~ 151 1
15 NAME HH 7-11 MMS 2 smm 03 29 03.056 +31 15 51.67           ~ 73 0
16 [RAC97] VLA 3 smm 03 29 03.372 +31 16 01.60           ~ 32 0
17 [SVS76] NGC 1333 13A2 IR 03 29 03.374 +31 16 01.87           ~ 13 0
18 [SVS76] NGC 1333 13A smm 03 29 03.73 +31 16 03.8           ~ 66 0
19 V* V512 Per Or* 03 29 03.7567945196 +31 16 03.959183877           ~ 364 0
20 NAME HH 7-11 FIR 03 29 03.9 +31 16 06           ~ 339 0
21 HH 10 HH 03 29 05.456 +31 15 45.32           ~ 139 1
22 ASR 6 Y*O 03 29 06.425 +31 15 34.86           ~ 155 1
23 HH 9 HH 03 29 06.5 +31 15 53           ~ 107 1
24 HH 16 HH 03 29 08.263 +31 09 09.32           ~ 18 0
25 [JCC87] IRAS 4A Y*O 03 29 10.49 +31 13 30.8           ~ 638 1
26 [JCC87] IRAS 4 FIR 03 29 10.9 +31 13 26           ~ 473 0
27 HH 6 HH 03 29 11.2 +31 18 34           ~ 64 0
28 NGC 1333 OpC 03 29 11 +31 18.6           ~ 1278 1
29 [KJD2006] SMM J032917+31184 Y*O 03 29 11.3 +31 18 25           ~ 55 0
30 [JCC87] IRAS 4B Y*O 03 29 12.058 +31 13 02.05           ~ 573 0
31 HH 347 HH 03 29 15.7 +31 15 22           ~ 8 0
32 HH 5 HH 03 29 20.424 +31 12 51.28           ~ 41 1
33 HH 18 HH 03 29 26.4 +31 07 38           ~ 19 0
34 RAFGL 5123 Y*O 04 31 34.07736 +18 08 04.9020           K3V/M3III 823 0
35 BHR 71 MoC 12 01 36.810 -65 08 49.22           ~ 128 0
36 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5466 1
37 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 389 0
38 [SSG2006] MMS002 smm 16 26 26.50 -24 24 30.9           ~ 241 0
39 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1589 2
40 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 851 1
41 NAME LDN 723 VLA 2 Rad 19 17 53.67 +19 12 19.5           ~ 26 0
42 LDN 1177 DNe 21 17 38.62 +68 17 34.0           ~ 83 1

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2021.09.17-14:17:55

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