Published July 20, 2011 | Version v1
Journal article Metadata-only

DETECTION OF TWO CARBON-CHAIN-RICH CORES: CB130-3 AND L673-SMM4

Creators

  • 1. National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka, Tokyo 181-8588 (Japan)
  • 2. Institute of Astronomy, University of Tokyo, Osawa 2-21-1, Mitaka, Tokyo 181-0015 (Japan)
  • 3. Department of Physics and Research Center for the Early Universe, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033 (Japan)

Description

We have found two dense cores, CB130-3 and L673-SMM4, where the carbon-chain molecules are extremely abundant relative to NH3, during a survey observation of radio emission lines of CCS, HC3N, HC5N, and NH3 toward dark cloud cores. Judging from the low NH3/CCS ratios, they are possible candidates for 'Carbon-Chain-Producing Regions' (CCPRs) recognized as chemically young dark cloud cores. The deuterium fractionation ratios DNC/HN13C in CB130-3 and L673-SMM4 are found to be 1.28+0.27-0.05 and 1.96+0.32-0.01, respectively, which are comparable to or slightly higher than those in CCPRs found previously. We suggest that the dense cores of CB130-3 and L673-SMM4 are analogous to CCPRs, but their chemical evolutionary phase would be slightly older than those of the dense cores in the Taurus region.

Availability note (English)

Available from http://dx.doi.org/10.1088/0004-637X/736/1/4

Additional details

Identifiers

DOI
10.1088/0004-637X/736/1/4;

Publishing Information

Journal Title
Astrophysical Journal
Journal Volume
736
Journal Issue
1
Journal Page Range
[8 p.]
ISSN
0004-637X
CODEN
ASJOAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43056082
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
ABUNDANCE; AMMONIA; CARBON; CLOUDS; DETECTION; DEUTERIUM; EMISSION; FRACTIONATION; NITRILES
Descriptors DEC
ELEMENTS; HYDRIDES; HYDROGEN COMPOUNDS; HYDROGEN ISOTOPES; ISOTOPES; LIGHT NUCLEI; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; NONMETALS; NUCLEI; ODD-ODD NUCLEI; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; SEPARATION PROCESSES; STABLE ISOTOPES