New Short-Period δ Scuti Stars in OGLE-IV Fields toward the Galactic Bulge

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

Identyfikatory

DOI

10.32023/0001-5237/72.3.1

• Języki publikacji: EN

Abstrakty

EN

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 with dominant periods between 22 min and 54 min whose type could not have been unambiguously established based on photometry only. A low-resolution spectroscopic follow-up observations have shown that all the objects are main sequence A/F-type stars. Thus, all the variables are δ Sct-type pulsators. We have added them to the OGLE-IV Collection of Variable Stars.

Słowa kluczowe

EN

catalogs; stars: variables: delta Scuti; Galaxy: bulge; Galaxy: disk

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2022
• Tom: Vol. 72, No. 3
• Strony: 161--170
• Opis fizyczny: Bibliogr. 35 poz., rys., tab., wykr.

Twórcy

autor

Pietrukowicz P.

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

autor

Ratajczak M.

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

autor

Soszyński I.

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

autor

Udalski A.

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

autor

Szymański M. K.

• stronomical 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.

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

autor

Kozłowski S.

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

autor

Skowron J.

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

autor

Skowron D. M.

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

autor

Mróz P.

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

autor

Rybicki K.

• stronomical 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.

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

autor

Wrona M.

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

autor

Gromadzki M.

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

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