2006A&A...454L..51B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.09CEST22:50:21

2006A&A...454L..51B - Astronomy and Astrophysics, volume 454, L51-54 (2006/8-1)

The evolutionary state of the southern dense core Chamaeleon-MMS1.

BELLOCHE A., PARISE B., VAN DER TAK F.F.S., SCHILKE P., LEURINI S., GUESTEN R. and NYMAN L.-A.

Abstract (from CDS):

Our goal is to set constraints on the evolutionary state of the dense core Cha-MMS1 in the Chamaeleon I molecular cloud. We analyze molecular line observations carried out with the new submillimeter telescope APEX. We look for outflow signatures around the dense core and probe its chemical structure, which we compare to predictions of models of gas-phase chemistry. We also use the public database of the Spitzer Space Telescope (SST) to compare Cha-MMS1 with the two Class 0 protostars IRAM 04191 and L1521F, which are at the same distance. We measure a large deuterium fractionation for N2H+ (11±3%), intermediate between the prestellar core L1544 and the very young Class 0 protostar L1521F. It is larger than for HCO+ (2.5±0.9%), which is probably the result of depletion removing HCO+ from the high-density inner region. Our CO(3-2) map reveals the presence of a bipolar outflow driven by the Class I protostar Ced 110 IRS 4 but we do not find evidence for an outflow powered by Cha-MMS1. We also report the detection of Cha-MMS1 at 24, 70 and 160µm by the instrument MIPS of the SST, at a level nearly an order of magnitude lower than IRAM 04191 and L1521F. Cha-MMS1 appears to have already formed a compact object, either the first hydrostatic core at the very end of the prestellar phase, or an extremely young protostar that has not yet powered any outflow, at the very beginning of the Class 0 accretion phase.

Abstract Copyright:

Journal keyword(s): stars: formation - ISM: individual objects: Cha-MMS1 - ISM: abundances - astrochemistry - ISM: jets and outflows

Simbad objects: 13

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Number of rows : 13

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 IRAS 04191+1523 Y*O 04 22 00.43944 +15 30 21.2148           ~ 184 0
2 LDN 1521F DNe 04 28 39.3 +26 51 43           ~ 183 1
3 Bad 16 Y*O 04 30 50.2775823865 +23 00 08.771252817       14.95   F1 132 0
4 V* R Dor AB* 04 36 45.59127 -62 04 37.7974 7.84 6.98 5.40 2.71 -0.44 M8III:e 282 0
5 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 680 0
6 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 434 1
7 RAFGL 4078 C* 07 45 02.4140089106 -71 19 45.852846228       15.92 12.72 C 44 0
8 [PCW91] Ced 110 IRS 10 Y*O 11 06 33.38 -77 23 34.6           ~ 58 1
9 IRAS 11051-7706 Y*O 11 06 46.025 -77 22 29.67           ~ 71 0
10 [PMG2001] NIR 76 Y*? 11 06 46.580 -77 22 32.56           ~ 55 0
11 NAME Cha I MoC 11 06 48 -77 18.0           ~ 968 1
12 [PMG2001] NIR 89 Y*O 11 06 53.80 -77 23 59.9           ~ 6 0
13 WOS 48 C* 15 23 05.0744336371 -51 25 58.881494593   17.85 16.66 14.51 10.18 C 118 1

    Equat.    Gal    SGal    Ecl

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2020.07.09-22:50:21

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