| Name: Subhashis Roy |
| Affiliation: NCRA-TIFR |
| Conference ID: ASI2026_563 |
| Title: The Galactic centre region: Recent advances |
| Abstract Type: Invited |
| Abstract Category: Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Author(s) and Co-Author(s) with Affiliation: Subhashis Roy(NCRA-TIFR, Pune - 411007, India), Debangan Maji(NCRA-TIFR, Pune - 411007, India) |
| Abstract: The central region of the Galaxy allows us to observe the phenomena associated
with the most highly dense region of a galaxy with high spatial resolution.
Past observations in radio band uncovered several atypical objects and
phenomena. These include the non-thermal filaments (NTFs), which could only be
seen within about a degree from the Galactic centre (GC). Their origin is still
not understood. More recent observations in radio bands have been able to
unveil the region with almost an order of magnitude better sensitivity. We
shall discuss on the understanding of the region made from these recent
observations. For example, the recent Meerkat image of the region at ~1 GHz
has resulted in discovery of many more filaments. Their properties, however,
are somewhat in variance than the initially discovered NTFs. We shall examine
whether these filaments are indeed omnipresent beyond the GC region. We have
made an image of the region around the GC at ~400 MHz with uGMRT, which has
comparable sensitivity as the Meerkat image for synchrotron emitting sources
and shall discuss on the new findings from the low frequency image. We have
also used HI absorption studies towards the same region, and show that indeed
the 7' halo seen around the central region in radio is associated with the
central few hundred pc region of the Galaxy. |
