PKS 0344-291
PKS 0344-291 (also known as J0347-2900), is a compact steep-spectrum (CSS) radio source and a candidate gigahertz-peaked spectrum (GPS) object. It is hosted by a galaxy pair at a redshift of z = 0.142.[1][2]
Discovery and Characteristics
The source is designated PKS 0344-291 from the Parkes Catalogue of Radio Sources (PKS survey), a major southern hemisphere radio survey conducted in the 1960s–1980s.[3][4]
Searches for associated neutral hydrogen (HI) 21-cm absorption, conducted with the Giant Metrewave Radio Telescope (GMRT) and upgraded GMRT (uGMRT), resulted in non-detections. Reported upper limits are optical depth τ < 0.22 and HI column density N(HI) < 0.42 × 1020 cm−2 (assuming a spin temperature of 100 K and covering factor of unity). These limits are consistent with other non-absorbing CSS/GPS sources and help constrain the properties of the interstellar medium, jet-ISM interactions, and absorption mechanisms (such as free-free absorption) in compact, young radio galaxies.[2]
References
- ↑ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2026-02-20.
- ↑ 2.0 2.1 Mhaskey, Mukul; Paul, Surajit; Gupta, Neeraj; Mukherjee, Dipanjan; Gopal-Krishna (2020-11). "uGMRT HI 21-cm absorption observations of two extremely inverted spectrum sources". Astronomy & Astrophysics. 643: A174. doi:10.1051/0004-6361/202038923. ISSN 0004-6361. Check date values in:
|date=(help) - ↑ "1989MNRAS.236..737E Page 737". adsabs.harvard.edu. Retrieved 2026-02-20.
- ↑ Parma, P.; de Ruiter, H. R.; Cameron, R. A. (1991-12). "Very Large Array Observations of Radio-Selected Dumbbell Galaxies". The Astronomical Journal. 102: 1960. doi:10.1086/116018. ISSN 0004-6256. Check date values in:
|date=(help)
This article "PKS 0344-291" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:PKS 0344-291. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.
