2006A&A...457..865B


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET02:39:39

2006A&A...457..865B - Astronomy and Astrophysics, volume 457, 865-876 (2006/10-3)

Who is eating the outflow? High-angular resolution study of an intermediate-mass protostar in L1206.

BELTRAN M.T., GIRART J.M. and ESTALELLA R.

Abstract (from CDS):

Up to now only a few intermediate-mass molecular outflows have been studied with enough high-angular resolution. The aim of this work is to study in detail the intermediate-mass YSO IRAS 22272+6358A, which is embedded in L1206, and its molecular outflow, to investigate the interaction of the outflow with the dense protostellar material and to compare their properties with those of lower mass counterparts. We carried out OVRO observations of the 2.7mm continuum emission, CO (J=1->0), C18O(J=1->0), and HC3N (J=12->11) to map the core of L1206 with high-angular resolution and to derive the properties of the dust emission, the molecular outflow, and the dense protostellar envelope. The 2.7mm continuum emission has been resolved into four sources, labeled OVRO 1, 2, 3, and 4. The intermediate-mass Class 0/I object OVRO 2, with a mass traced by the dust emission of 14.2M, is the source associated with IRAS 22272+6358A. The CO (J=1->0) observations have revealed a very collimated outflow driven by OVRO 2, at a PA≃140°, that has a very weak southeastern red lobe and a much stronger northwestern blue lobe. Photodissociation toward the red lobe produced by the ionization front coming from the bright-rimmed diffuse H II region could be responsible for the morphology of the outflow. The spatial correlation between the outflow and the elongated dense protostellar material traced by HC3N (J=12->11) suggests an interaction between the molecular outflow and the protostellar envelope. Shocks produced by the molecular outflow, and possibly by the shock front preceding the ionization front, could account for the southern enhancement of HC3N. The properties of the intermediate-mass protostar OVRO 2 and the molecular outflow are consistent with those of lower mass counterparts. The C18O abundance relative to molecular hydrogen estimated toward OVRO 2 is 3x10–8, a value ∼6 to 13 times lower than typical abundances estimated toward molecular clouds. The most plausible explanation for such a difference is CO depletion toward OVRO 2.

Abstract Copyright:

Journal keyword(s): ISM: individual objects: L1206 - ISM: individual objects: IRAS 22272+6358A - ISM: jets and outflows - stars: circumstellar matter - stars: formation

Nomenclature: Table 2: [BGE2006] OVRO N (Nos 1-4).

Simbad objects: 23

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Number of rows : 23

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 HH 288 HH 00 37 13.6 +64 04 15           ~ 22 0
2 HH 211 cor 03 43 56.52 +32 00 52.8           ~ 302 0
3 IRAS 04239+2436 Y*O 04 26 56.29704 +24 43 35.3280           ~ 149 0
4 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 779 1
5 IRAS 05361+3539 Y*O 05 39 28.64016 +35 40 36.9588           ~ 35 0
6 NAME LDN 1641 S3 HII 05 39 56.1 -07 30 26           ~ 62 0
7 NAME LDN 1641 South DNe 05 40 27.6 -07 27 28           ~ 50 1
8 [MCK88] NGC 2024 FIR 5 cor 05 41 44.6 -01 55 38           ~ 91 0
9 NGC 2071 RNe 05 47 10 +00 18.0           ~ 612 1
10 2MASS J08254384-5100326 Y*O 08 25 43.85 -51 00 32.7           ~ 299 1
11 HH 47 HH 08 25 44.30 -51 00 26.2           ~ 242 0
12 NAME SH 2-68 FIR 1 cor 18 29 49.63 +01 15 21.9           ~ 240 2
13 IRAS 20050+2720 Y*O 20 07 06.549 +27 28 49.10           ~ 100 0
14 NAME IRAS 20050+2720 Cluster Cl* 20 07 06.7 +27 28 53           ~ 83 0
15 [BGE2002] BIMA 2 Y*O 21 40 42.36 +58 16 09.7           ~ 116 0
16 NAME IC 1396 North CGb 21 40 42.6537 +58 16 01.882           ~ 182 1
17 NGC 7129 OpC 21 42 56 +66 06.2     11.5     ~ 236 0
18 [BGE2006] OVRO 1 mm 22 28 50.49 +64 13 50.7           ~ 2 0
19 [BGE2006] OVRO 2 mm 22 28 51.41 +64 13 41.1           ~ 3 0
20 LDN 1206 DNe 22 28 52.2 +64 13 43           ~ 63 0
21 IRAS 22272+6358A Cld 22 28 52.2 +64 13 43           ~ 48 0
22 [BGE2006] OVRO 3 mm 22 28 53.25 +64 13 32.1           ~ 2 0
23 [BGE2006] OVRO 4 mm 22 28 53.98 +64 13 34.5           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2021.02.26-02:39:39

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