A Radio Spectral Line Study of the 2-Jy IRAS-NVSS Sample: Part I
Maria Ximena Fernandez, Emmanuel Momjian, Christopher J. Salter,, Tapasi Ghosh
TL;DR
This study reports extensive radio spectral line observations of 85 IR galaxies, revealing new detections of HI and OH lines, with many galaxies showing signs of interactions or mergers, enhancing understanding of galaxy properties.
Contribution
It provides new HI and OH line detections in IR galaxies, including several first-time detections, and analyzes spectral profiles indicating galaxy interactions.
Findings
82 out of 85 galaxies detected in HI 21 cm line
7 galaxies detected in OH 18 cm lines
Most galaxies show distorted HI spectral features
Abstract
We present results from an on-going survey for the HI 21 cm line and the OH 18 cm lines in IR galaxies with the Arecibo 305 m Radio Telescope. The observations of 85 galaxies extracted from the 2 Jy IRAS-NVSS sample in the R.A. (B1950) range 20 h-00 h are reported in this paper. We detected the HI 21 cm line in 82 of these galaxies, with 18 being new detections, and the OH 18 cm lines in 7 galaxies, with 4 being new detections. In some cases, the HI spectra show the classic double-horned or single-peaked emission profiles. However, the majority exhibit distorted HI spectral features indicating that the galaxies are in interacting and/or merging systems. From these HI and OH observations, various properties of the sample are derived and reported.
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