3 papers
astro-ph.SR2025
On variability of DDO68-V1, a unique extremely metal-poor LBV
S. A. Pustilnik, Y. A. Perepelitsyna
DDO68-V1 is a Luminous Blue Variable (LBV) star in the eXtremely Metal-Poor (XMP) galaxy DDO68. It resides in the HII region with 12+log(O/H)~7.1 dex, or Z ~ Zo/40. Since DDO68-V1…
astro-ph.GA2024
Monitoring of DDO68 'Northern Ring' SF regions during years 2016-2023
S. A. Pustilnik, Y. A. Perepelitsyna, A. S. Vinokurov +6
DDO68 is a star-forming (SF) dwarf galaxy residing in a nearby void. Its gas metallicity is among the lowest known in the local Universe, with parameter 12+log(O/H) in the range of…
astro-ph.GA2024
HI Studies of Extremely Metal Poor Dwarfs in Voids -- I
Sushma Kurapati, Simon A. Pustilnik, Evgeniya S. Egorova
We present and discuss the results of the Giant Metrewave Radio Telescope (GMRT) HI 21-cm line mapping for five isolated low-mass (M_bary ~(2--8)*10^7 Mo) eXtremely Metal Poor (XMP…