By analyzing the data from the Dark Energy Camera Legacy Survey (DECaLS), astronomers from the Christ University in Bangalore, India, have serendipitously discovered a new ring galaxy, which received designation DES J024008.08-551047.5 and may belong to the rare class of polar ring galaxies. The finding was reported in a paper published August 29 on the pre-print server arXiv.
The so-called polar ring galaxies (PRGs) are systems composed of an S0-like galaxy and a polar ring, which remain separate for billions of years. In general, these outer polar rings, composed of gas and stars, are aligned roughly in a perpendicular orientation with respect to the major axis of the central host galaxy.
However, although more than 400 PRG candidates have been discovered to date, only dozens of them have been confirmed as real polar ring galaxies by follow-up spectroscopic observations.
Now, a team of astronomers led by Akhil Krishna has detected another PRG candidate. The detection of DES J024008.08-551047.5 (or DJ0240) was made during visual observations of optical imaging data from DECaLS.
“We discovered the galaxy DJ0240 as a potential PRG candidate with a ring component positioned almost perpendicular to the host galaxy,” the researchers wrote in the paper.
2023-09-06 01:24:03
Source from phys.org
