Zobrazeno 1 - 10
of 11 805
pro vyhledávání: '"Ogle, P."'
Autor:
Han, Xiao, Wang, Hai-Feng, Carraro, Giovanni, López-Corredoira, Martín, Ting, Yuan-Sen, Luo, Yang-Ping, Wang, Guan-Yu
We present an analysis of the structure, kinematics, and chemo-dynamical properties of the Milky Way bulge using data from OGLE, APOGEE, and Gaia. Firstly, we identified 2,156 ab-type RR Lyrae stars (RRabs) from OGLE-IV, then through their apocenters
Externí odkaz:
http://arxiv.org/abs/2412.00752
Massive contact binaries are fundamental test-beds to study properties of close binaries en route to stellar mergers. Progress in their understanding has been largely impeded due to a dearth in their observed counterparts. We accumulate 61 over-conta
Externí odkaz:
http://arxiv.org/abs/2410.16427
Autor:
Mróz, Przemek, Udalski, Andrzej, Szymański, Michał K., Soszyński, Igor, Pietrukowicz, Paweł, Kozłowski, Szymon, Poleski, Radosław, Skowron, Jan, Ulaczyk, Krzysztof, Gromadzki, Mariusz, Rybicki, Krzysztof, Iwanek, Patryk, Wrona, Marcin, Mróz, Mateusz J.
Publikováno v:
ApJL 976, 19 (2024)
Observations of the Galactic bulge revealed an excess of short-timescale gravitational microlensing events that are generally attributed to a large population of free-floating or wide-orbit exoplanets. However, in recent years, some authors suggested
Externí odkaz:
http://arxiv.org/abs/2410.06251
Autor:
Monsalves, N., Arancibia, M. Jaque, Bayo, A., Sánchez-Sáez, P., Angeloni, R., Damke, G, Van de Perre, J. Segura
Publikováno v:
A&A 691, A106 (2024)
In recent years the amount of publicly available astronomical data has increased exponentially, with a remarkable example being large scale multiepoch photometric surveys. This wealth of data poses challenges to the classical methodologies commonly e
Externí odkaz:
http://arxiv.org/abs/2408.11960
Autor:
Muñoz, Jaime, García-Varela, Alejandro, Henao-Castellanos, Santiago, Sabogal, Beatriz, Giraldo, Luis Felipe
Publikováno v:
The Astronomical Journal, 168:162 (9pp), 2024
TThe Period-Luminosity (PL) relation for Cepheid variable stars in the Large Magellanic Cloud (LMC) is crucial for distance measurements in astronomy. This study analyzes the impact of using the median rather than the mean on the PL relation's slope
Externí odkaz:
http://arxiv.org/abs/2408.01592
Autor:
Iwanek, P., Soszyński, I., Stępień, K., Kozłowski, S., Skowron, J., Udalski, A., Szymański, M. K., Wrona, M., Pietrukowicz, P., Poleski, R., Mróz, P., Ulaczyk, K., Skowron, D. M., Gromadzki, M., Rybicki, K., Mróz, M. J., Ratajczak, M.
Stellar rotation, a key factor influencing stellar structure and evolution, also drives magnetic activity, which is manifested as spots or flares on stellar surface. Here, we present a collection of 18 443 rotating variables located toward the Galact
Externí odkaz:
http://arxiv.org/abs/2406.18728
Autor:
Mozaheb, Saeed, Rahvar, Sohrab
This study commenced by cross-matching data from the GAIA and OGLE telescopes with the aim of resolving the source star, long after microlensing is finished. The aim is breaking degeneracy between parameters of the microlensing equation, and ultimate
Externí odkaz:
http://arxiv.org/abs/2405.16454
Autor:
Borowicz, J., Pietrukowicz, P., Skowron, J., Soszyński, I., Udalski, A., Szymański, M. K., Ulaczyk, K., Poleski, R., Kozłowski, S., Mróz, P., Skowron, D. M., Rybicki, K., Iwanek, P., Wrona, M., Gromadzki, M., Mróz, M. J.
Publikováno v:
Acta Astronomica, Vol. 73 (2023), No. 4, pp. 265-290
In this work, we search the OGLE-IV outer Galactic bulge fields for short-period variable objects. The investigation focuses on unexplored timescales roughly below one hour in an area containing about 700 million stellar sources down to approximately
Externí odkaz:
http://arxiv.org/abs/2404.17715
Autor:
Taormina, Mónica, Kudritzki, R. -P., Pilecki, B., Pietrzyński, G., Thompson, I. B., Puls, J., Górski, M., Zgirski, B., Graczyk, D., Gieren, W., Hajdu, G.
We present the results from a complex study of an eclipsing O-type binary (Aa+Ab) with the orbital period $P_{A}=3.2254367$ days, that forms part of a higher-order multiple system in a configuration (A+B)+C. We derived masses of the Aa+Ab binary $M_{
Externí odkaz:
http://arxiv.org/abs/2404.02970
Autor:
Mroz, P., Udalski, A., Szymanski, M. K., Kapusta, M., Soszynski, I., Wyrzykowski, L., Pietrukowicz, P., Kozlowski, S., Poleski, R., Skowron, J., Skowron, D., Ulaczyk, K., Gromadzki, M., Rybicki, K., Iwanek, P., Wrona, M., Ratajczak, M.
Publikováno v:
ApJS 273, 4 (2024)
Measurements of the microlensing optical depth and event rate toward the Large Magellanic Cloud (LMC) can be used to probe the distribution and mass function of compact objects in the direction toward that galaxy - in the Milky Way disk, the Milky Wa
Externí odkaz:
http://arxiv.org/abs/2403.02398