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UVIT observation of Milky Way satellite galaxy Reticulum II
Thirupathi, Sivarani; Divakar, Devika K.; Doddamani, Vijayakumar H.
We present the UV photometry of one of the Ultra-Faint Dwarf (UFD) Milky Way (MW) satellite galaxies, Reticulum II, using images acquired with the Ultra-Violet Imaging Telescope (UVIT) onboard AstroSat. Reticulum II is a dark matter dominated, one of the most metal-poor and old (13.5 Gyr) satellite galaxies. High resolution spectroscopy of red gia…
A pair of UV nuclei or a compact star-forming region near the active nucleus in Mrk 766?
Singh, K. P.; Dewangan, G. C.; Deka, P. P. +1 more
We report the discovery of a bright, compact ultraviolet source at a projected separation of 1.1 kpc from the known active galactic nucleus (AGN) in Mrk 766 based on AstroSat/UVIT observations. We perform radial profile analysis and derive the UV flux almost free from the nearby contaminating sources. The new source is about 2.5 and 5.6 times fain…
Study of dynamical status of the globular cluster NGC 1851 using ultraviolet imaging telescope
Yadav, R. K. S.; Sahu, Snehalata; Subramaniam, Annapurni +1 more
We present the study of dynamical status of the globular cluster NGC 1851. A combination of multi-wavelength space and ground-based data sets are used for the present analysis. In order to select the genuine cluster members, we used the astro-photometric data available from HST and GAIA-DR2 catalogs. The BSS radial distribution of the cluster is p…