Blue Large-Amplitude Pulsators and Other Short-Period Variable Stars in the OGLE-IV Galactic Disk Fields

• Autorzy: Borowicz J. , Pietrukowicz P. , Mróz P. , Soszyński I. , Udalski A. , Szymański M. K. , Ulaczyk K. , Poleski R. , Kozłowski S. , Skowron J. , Skowron D. M. , Rybicki K. , Iwanek P. , Wrona M. , Gromadzki M.

Identyfikatory

DOI

10.32023/0001-5237/73.1.1

• Języki publikacji: EN

Abstrakty

EN

Blue Large-Amplitude Pulsators (BLAPs) form a mysterious class of variable stars with typical periods of tens of minutes and amplitudes above 0.1 mag. In this work, we present results of a variability search focused on timescales shorter than 1 h, conducted in OGLE-IV Galactic disk fields containing about 1.1 billion stellar sources down to I≈20 mag. Twenty-five BLAPs have been detected, 20 of which are new discoveries. Their periods range from 8.4 min to 62.1 min. We have also found six new eclipsing binary systems with orbital periods from 38.3 min to 121.3 min and five short-period large-amplitude (> 0.17 mag in the I-band) variable stars of unknown type.

Słowa kluczowe

EN

stars: oscillations; binaries: eclipsing

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2023
• Tom: Vol. 73, No. 1
• Strony: 1--19
• Opis fizyczny: Bibliogr. 36 poz., tab., wykr.

Twórcy

autor

Borowicz J.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Pietrukowicz P.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Mróz P.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Soszyński I.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Udalski A.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Szymański M. K.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Ulaczyk K.

• Department of Physics, University of Warwick, Coventry CV4 7AL, UK

autor

Poleski R.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Kozłowski S.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Skowron J.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Skowron D. M.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Rybicki K.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
• Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel

autor

Iwanek P.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Wrona M.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Gromadzki M.

• Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

Bibliografia

• Bailer-Jones, C.A.L., Rybizki, J., Fouesneau, M., Demleitner, M., and Andrae, R. 2021, AJ, 161, 147.
• Bellm, E.C., Kulkarni, S.R., Graham, M.J., et al. 2019, PASP, 131, 018002.
• Boller, T., Freyberg, M.J., Trümper, J., et al. 2016, A&A, 588, A103.
• Burdge, K.B., Coughlin, M.W., Fuller, J., et al. 2019, Nature, 571, 528.
• Burdge, K.B., Coughlin, M.W., Fuller, J., et al. 2020, ApJ, 905, L7.
• Byrne, C.M., and Jeffery, C.S. 2018, MNRAS, 481, 3810.
• Byrne, C.M., Stanway, E.R., and Eldridge, J.J. 2021, MNRAS, 507, 621.
• Eyer, L., Audard, M., Holl, B., et al. 2023, A&A, 674, A13.
• Gaia Collaboration, Brown, A.G.A., Vallenari, A., et al. 2021, A&A, 649, A1.
• Guidry, J.A., Vanderbosch, Z.P., Hermes, J.J., et al. 2021, ApJ, 912, 125.
• Iwanek, P., Soszyński, I., Kozłowski, S., et al. 2022, ApJS, 260, 46.
• Kupfer, T., Bauer, E.B., Burdge, K.B., et al. 2019, ApJ, 878, L35.
• Kupfer, T., Prince, T.A., van Roestel, J., et al. 2021, MNRAS, 505, 1254.
• Lin, J., Wang, X., Mo, J., et al. 2022, MNRAS, 509, 2362.
• Lin, J., Wu, Ch., Wang, X., et al. 2023a, Nature Astronomy, 7, 223.
• Lin, J., Wang, X., Mo, J., et al. 2023b, MNRAS, 523, 2172.
• Meng, X.-C., Han, Z.-W., Podsiadlowski, P., and Li, J. 2020, ApJ, 903, 100.
• Macfarlane, S.A, Toma, R., Ramsay, G., et al. 2015, MNRAS, 454, 507.
• McWhirter, P.R., and Lam, M.C. 2022, MNRAS, 511, 4971.
• Pietrukowicz, P. 2018, in: “The RR Lyrae 2017 Conference. Revival of the Classical Pulsators: from Galactic Structure to Stellar Interior Diagnostics”, p.258.
• Pietrukowicz, P., Dziembowski, W.A., Latour, M., et al. 2017, Nature Astronomy, 1, 0166.
• Pietrukowicz, P., Ratajczak, M., Soszyński, I., et al. 2022, Acta Astron., 72, 161.
• Pietrukowicz, P., Latour, M., Soszyński, I., et al. 2023, ApJ, submitted.
• Pigulski, A., Kotysz, K., and Kołaczek-Szymański, P.A. 2022, A&A, 663, A62.
• Ramsay, G., Woudt, P.A., Kupfer, T., et al. 2022, MNRAS, 513, 2215.
• Ren, L., Li, C., Ma, B., et al. 2023, ApJS, 264, 39.
• Romero, A.D., Córsico, A.H., Althaus, L.G., Pelisoli, I., and Kepler, S.O. 2018, MNRAS, 477, L30.
• Schlafly, E.F., Green, G.M., Lang, D., et al. 2018, ApJS, 234, 39.
• Soszyński, I., Stępień, K., Pilecki, B., et al. 2015, Acta Astron., 65, 39.
• Soszyński, I., Udalski, A., Wrona, M., et al. 2019, Acta Astron., 69, 321.
• Soszyński, I., Pietrukowicz, P., Skowron, J., et al. 2021, Acta Astron., 71, 189.
• Schwarzenberg-Czerny, A. 1996, ApJ, 460, L107.
• Toma, R., Ramsay, G., Macfarlane, S., et al. 2016, MNRAS, 463, 1099.
• Udalski, A., Szymański, M.K., and Szymański, G. 2015, Acta Astron., 65, 1.
• Udalski, A., Soszyński, I., Pietrukowicz, P., et al. 2018, Acta Astron., 68, 315.
• Wu, T., and Li, Y. 2018, MNRAS, 478, 3871.