28 citations · 74 across the 11 of their papers we have counts for
11 papers
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…
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…
Dwarfs in nearby voids: results of SALT spectroscopy
S. A. Pustilnik, A. Y. Kniazev, A. L. Tepliakova +2
In the framework of the ongoing project, aimed at the systematical studying galaxies in nearby voids, we conducted spectroscopy with the Southern African Large Telescope (SALT) of…
Nearby voids and their galaxies: recent progress and prospects
S. Pustilnik, Y. Perepelitsyna, A. Tepliakova +4
Voids occupy about 3/4 of the volume of the Universe and contain about 15% of its mass. Due to various observational selection effects, these structure elements and galaxies popula…
Local Volume dwarf KK242: radial velocity, SF region, and metallicity
S. A. Pustilnik, A. L. Tepliakova, Y. A. Perepelitsyna +5
KK242 is a LV dwarf of transition type residing in the void environment. Koda et al. present clear indications on its connection with Scd galaxy NGC6503. This implies the distance…
XMP gas-rich dwarfs in nearby voids: results of BTA spectroscopy
S. A. Pustilnik, E. S. Egorova, A. Y. Kniazev +4
We present the second part of results of the on-going project of searching for and studying eXtremely Metal-Poor (XMP, adopted as those with Z(gas) <~ Zo/30, or with 12+log(O/H) <~…
DDO68-V1: an extremely metal-poor LBV in a void galaxy
Yulia Perepelitsyna, Simon Pustilnik
The lowest metallicity massive stars in the Local Universe with Z~(Zo/50-Zo/30) are the crucial objects to test the validity of assumptions in the modern models of very low-metalli…
Very gas-rich extremely metal-poor blue void dwarfs
S. Pustilnik, Y. Perepelitsyna, A. Kniazev +2
Half-dozen of extreme representatives of void dwarf galaxy population were found in our study of evolutionary status of a hundred galaxies in the nearby Lynx-Cancer void. They are…
Extremely metal-poor galaxy DDO 68: the LBV, H-alpha shells and the most luminous stars
S. A. Pustilnik, L. N. Makarova, Y. A. Perepelitsyna +2
The paper presents new results of the ongoing study of the unusual Lynx-Cancer void galaxy DDO 68 with record-low-metallicity regions (12+log(O/H) ~7.14) of the current star format…
New radial velocities for dwarf galaxies in the Local Volume
I. D. Karachentsev, M. E. Sharina, D. I. Makarov +2
Radial velocities measured with the 6-meter telescope are given for 5 faint dwarf galaxies. All of these galaxies are confirmed as very nearby objects. Two of them, KK135 (dIr) and…
Study of the Lynx-Cancer void galaxies-V. The extremely isolated galaxy UGC4722
J. N. Chengalur, S. A. Pustilnik, D. I. Makarov +3
We present a detailed study of the extremely isolated Sdm galaxy UGC4722 (M_B = -17.4) located in the nearby Lynx-Cancer void. UGC4722 is a member of the catalogue of isolated gala…