175 citations · 1.4k across the 45 of their papers we have counts for
28 papers · 1 filter
New Short-Period Delta Scuti Stars in OGLE-IV Fields toward the Galactic Bulge
P. Pietrukowicz, M. Ratajczak, I. Soszynski +12
We report the classification of 24 puzzling short-period variable stars located in OGLE-IV Galactic bulge fields. The stars are low-amplitude (<0.05 mag) multi-periodic objects wit…
Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035
A. Herald, A. Udalski, V. Bozza +89
Context. Brown dwarfs are poorly understood transition objects between stars and planets, with several competing mechanisms having been proposed for their formation. Mass measureme…
Multiwavelength properties of Miras
Patryk Iwanek, Szymon Kozłowski, Mariusz Gromadzki +12
We comprehensively study the variability of Miras in the Large Magellanic Cloud (LMC) by simultaneous analysing light curves in 14 bands in the range of 0.524 microns. We model…
Binarity as the Origin of Long Secondary Periods in Red Giant Stars
I. Soszyński, A. Olechowska, M. Ratajczak +13
Long secondary periods (LSPs), observed in a third of pulsating red giant stars, are the only unexplained type of large-amplitude stellar variability known at this time. Here we sh…
Over 10 000 Delta Scuti Stars toward the Galactic Bulge from OGLE-IV
P. Pietrukowicz, I. Soszynski, H. Netzel +12
We present a collection of 10 111 genuine delta Sct-type pulsating variable stars detected in the OGLE-IV Galactic bulge fields. In this sample, 9835 variables are new discoveries.…
Helium-rich Superluminous Supernovae From the Zwicky Transient Facility
Lin Yan, D. Perley, S. Schulze +39
Helium is expected to be present in the ejecta of some hydrogen-poor superluminous supernovae (SLSN-I). However, so far only one event, PTF10hgi has been identified with He feature…