Published May 1, 2010
| Version v1
Journal article
EVIDENCE FOR DIACETYLENE CATION AS THE CARRIER OF A DIFFUSE INTERSTELLAR BAND
- 1. Center for Astronomy, N. Copernicus University, Gagarina 11, Pl-87-100 Torun (Poland)
- 2. European Southern Observatory, Casilla 19001, Santiago 19 (Chile)
- 3. Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747 (Korea, Republic of)
- 4. Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw (Poland)
Description
High-quality spectra acquired at three different observatories point to the presence of a new diffuse interstellar band (DIB) at 5069 A. The spectral profile of this DIB matches published laboratory measurements of the diacetylene cation A 2Π u -X 2Π g (0-0) low-temperature gas-phase optical absorption. HC4H+ is approximately 60-80 times less abundant than CH along the analyzed lines of sight. Only an upper limit could presently be inferred from the search for an analogous band of the triacetylene cation HC6H+, expected at 6001.1 A, which implies the HC6H+ to HC4H+ ratio of less than ∼1/3.
Availability note (English)
Available from http://dx.doi.org/10.1088/2041-8205/714/1/L64Additional details
Identifiers
Publishing Information
- Journal Title
- Astrophysical Journal Letters
- Journal Volume
- 714
- Journal Issue
- 1
- Journal Page Range
- p. L64-L67
- ISSN
- 2041-8205
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41052654
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS; S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- ABSORPTION; CATIONS; INTERSTELLAR SPACE; MOLECULES; SPECTRA
- Descriptors DEC
- CHARGED PARTICLES; IONS; SORPTION; SPACE