2016A&A...587A..96P


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.27CET04:02:54

2016A&A...587A..96P - Astronomy and Astrophysics, volume 587A, 96-96 (2016/3-1)

Mid-J CO shock tracing observations of infrared dark clouds. II. Low-J CO constraints on excitation, depletion, and kinematics.

PON A., JOHNSTONE D., CASELLI P., FONTANI F., PALAU A., BUTLER M.J., KAUFMAN M., JIMENEZ-SERRA I. and TAN J.C.

Abstract (from CDS):

Infrared dark clouds are kinematically complex molecular structures in the interstellar medium that can host sites of massive star formation. We present maps measuring 4 square arcminutes of the 12CO, 13CO, and C18O J=3 to 2 lines from selected locations within the C and F (G028.37+00.07 and G034.43+00.24) infrared dark clouds (IRDCs), as well as single pointing observations of the 13CO and C18O J=2 to 1 lines towards three cores within these clouds. We derive CO gas temperatures throughout the maps and find that CO is significantly frozen out within these IRDCs. We find that the CO depletion tends to be the highest near column density peaks with maximum depletion factors between 5 and 9 in IRDC F and between 16 and 31 in IRDC C. We also detect multiple velocity components and complex kinematic structure in both IRDCs. Therefore, the kinematics of IRDCs seem to point to dynamically evolving structures yielding dense cores with considerable depletion factors.

Abstract Copyright:

Journal keyword(s): ISM: clouds - stars: formation - ISM: molecules - ISM: kinematics and dynamics - ISM: structure - ISM: abundances

VizieR on-line data: <Available at CDS (J/A+A/587/A96): list.dat fits/*>

Nomenclature: NAME Dragon Nebula N=1.

CDS comments: MM7 could be [RJS2006] MSXDC G028.37+00.07 MM7 or [RJS2006] MSXDC G034.43+00.24 MM7 in SIMBAD.

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 - 2021
#notes
1 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3641 0
2 [TKB2013] C1-S cor 18 42 46.50 -04 04 16.0           ~ 15 0
3 AGAL G028.324+00.067 Y*O 18 42 46.7 -04 04 08           ~ 44 0
4 [TKB2013] C1-N cor 18 42 46.89 -04 04 06.3           ~ 11 0
5 AGAL G028.344+00.061 cor 18 42 50.45 -04 03 17.7           ~ 70 0
6 NAME Dragon Nebula DNe 18 42 50.6 -04 03 30           ~ 118 0
7 AGAL G028.291+00.007 cor 18 42 56.3 -04 07 31           ~ 23 0
8 [RJS2006] MSXDC G034.43+00.24 MM8 mm 18 53 16.4 +01 26 20           ~ 31 0
9 [RJS2006] MSXDC G034.43+00.24 MM7 mm 18 53 18.3 +01 27 13           ~ 30 0
10 MSXDC G034.43+0.24 MoC 18 53 18.9 +01 26 39           ~ 67 0

    Equat.    Gal    SGal    Ecl

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2021.02.27-04:02:54

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