2005A&A...439.1023C


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET12:19:16

2005A&A...439.1023C - Astronomy and Astrophysics, volume 439, 1023-1032 (2005/9-1)

Dynamical and chemical properties of the ``starless'' core L1014.

CRAPSI A., DEVRIES C.H., HUARD T.L., LEE J.-E., MYERS P.C., RIDGE N.A., BOURKE T.L., EVANS II N.J., JORGENSEN J.K., KAUFFMANN J., LEE C.W., SHIRLEY Y.L. and YOUNG C.H.

Abstract (from CDS):

Spitzer Space Telescope observations of a point-like source, L1014-IRS, close to the dust peak of the low-mass dense core L1014, have raised questions about its starless nature. These show the presence of an object with colors expected for an embedded protostar with the implication that L1014-IRS would be the lowest luminosity isolated protostar known, and an ideal target with which to test star formation theories at the low mass end. In order to study its molecular content and to search for the presence of a molecular outflow, we mapped L1014 in at least one transition of 12CO, N2H+ , HCO+ , CS, and of their isotopologues 13CO, C18O , C17O , N2D+ , and H13CO+ , using the Five College Radio Astronomy Observatory (FCRAO), the IRAM 30m antenna, and the Caltech Submillimeter Observatory (CSO). The data show physical and chemical properties in L1014 typical of moderately evolved dense cores: i.e. H2 central density of a few 105molecules/cm3 , estimated mass of ∼2M, CO integrated depletion factor less than 10, N(N2H+)≃6x1012cm–2 , N(N2D+)/N(N2H+) equal to 10%, and relatively broad N2H+ and N2D+ lines (0.35km/s). Infall signatures and significant velocity shifts between optically thick and optically thin tracers are not observed in the line profiles. No classical signatures of molecular outflow are found in the 12CO and 13CO FCRAO observations. In particular, no high velocity wings are found, and no well-defined blue-red lobes of 12CO emission are seen in the channel maps. Sensitive, higher resolution observations will clarify the presence of a molecular outflow on a smaller scale than that probed by our observations.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: evolution - ISM: individual objects: L1014 - ISM: molecules - ISM: jets and outflows - stars: formation

Simbad objects: 17

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Number of rows : 17

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 LDN 1448 DNe 03 22.5 +30 35           ~ 475 0
2 NAME Per Arm PoG 03 30 +45.0           ~ 1290 0
3 NAME [BM89] L1498 PoC 04 10 51.4 +25 09 58           ~ 187 0
4 LDN 1498 DNe 04 11.0 +24 58           ~ 254 0
5 NAME [BM89] L1495 PoC 04 14 08.2 +28 09 31           ~ 170 0
6 LDN 1495 DNe 04 18.1 +27 37           ~ 301 1
7 IRAS 04191+1523 Y*O 04 22 00.43944 +15 30 21.2148           ~ 189 0
8 NAME [BM89] L1517B cor 04 55 18.8 +30 38 04           ~ 132 0
9 LDN 1512 MoC 05 04 09.7 +32 43 09           ~ 160 0
10 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 716 0
11 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 435 1
12 LDN 492 DNe 18 15 51 -03 44.4           ~ 44 0
13 LDN 1157 DNe 20 39 06.4 +68 02 13           ~ 500 0
14 Barnard 362 cor 21 24 04.0 +50 09 49           ~ 11 0
15 LDN 1014 cor 21 24 05.9 +49 59 07           ~ 92 0
16 NAME LDN 1014 IRS Y*O 21 24 07.58 +49 59 08.9           ~ 76 0
17 LDN 1165 DNe 22 06 50.7 +59 02 47           ~ 41 0

    Equat.    Gal    SGal    Ecl

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2021.03.02-12:19:16

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