Zobrazeno 1 - 10
of 221
pro vyhledávání: '"Gieren, Wolfgang P."'
Autor:
Zgirski, Bartłomiej, Gieren, Wolfgang, Pietrzyński, Grzegorz, Górski, Marek, Wielgórski, Piotr, Storm, Jesper, Bras, Garance, Kervella, Pierre, Nardetto, Nicolas, Hajdu, Gergely, Chini, Rolf, Haas, Martin
Publikováno v:
A&A 690, A295 (2024)
The Baade-Wesselink method allows us to estimate distances to individual pulsating stars. Accurate geometric parallaxes obtained by the Gaia mission serve us in the calibration of the method and in the determination of its precision. The method also
Externí odkaz:
http://arxiv.org/abs/2408.02102
Autor:
Evans, Nancy Remage, Gallenne, Alexandre, Kervella, Pierre, Mérand, Antoine, Monnier, John, Anderson, Richard I, Günther, H. Moritz, Proffitt, Charles, Winston, Elaine M., Pietrzynski, Grzegorz, Gieren, Wolfgang, Kuraszkiewicz, Joanna, Anugu, Narsireddy, Roettenbacher, Rachael M., Lanthermann, Cyprien, Gutierrez, Mayra, Schaefer, Gail, Setterholm, Benjamin R., Ibrahim, Noura, Kraus, Stefan
The Cepheid AW Per is a component in a multiple system with a long period orbit. The radial velocities of Griffin (2016) cover the 38 year orbit well. An extensive program of interferometry with the CHARA array is reported here, from which the long p
Externí odkaz:
http://arxiv.org/abs/2406.17881
Autor:
Wielgórski, Piotr, Pietrzyński, Grzegorz, Gieren, Wolfgang, Zgirski, Bartłomiej, Górski, Marek, Storm, Jesper, Nardetto, Nicolas, Kervella, Pierre, Bras, Garance, Hajdu, Gergely, Hocdé, Vincent, Pilecki, Bogumił, Narloch, Weronika, Karczmarek, Paulina, Pych, Wojciech, Chini, Rolf, Hodapp, Klaus
Type II Cepheids are old pulsating stars that can be used to trace the distribution of an old stellar population and to measure distances to globular clusters and galaxies within several megaparsecs. One method that can be used to measure the distanc
Externí odkaz:
http://arxiv.org/abs/2406.16561
Autor:
Pilecki, Bogumił, Thompson, Ian B., Espinoza-Arancibia, Felipe, Hajdu, Gergely, Gieren, Wolfgang, Taormina, Mónica, Pietrzyński, Grzegorz, Narloch, Weronika, Bono, Giuseppe, Gallenne, Alexandre, Kervella, Pierre, Wielgórski, Piotr, Zgirski, Bartłomiej, Graczyk, Dariusz, Karczmarek, Paulina, Evans, Nancy R.
Publikováno v:
A&A 686, A263 (2024)
Binary Cepheids with giant companions are crucial for studying the physical properties of Cepheid variables, providing the best means to measure their masses. Systems composed of two Cepheids are even more important but to date, only one such system
Externí odkaz:
http://arxiv.org/abs/2403.12390
Autor:
Narloch, Weronika, Hajdu, Gergely, Pietrzynski, Grzegorz, Gieren, Wolfgang, Wielgorski, Piotr, Zgirski, Bartlomiej, Karczmarek, Paulina, Gorski, Marek, Graczyk, Dariusz
We present the first period-luminosity (PL) and period-Wesenheit (PW) relations in the Sloan-Pans-STARRS gP1rP1iP1 bands for classical fundamental mode Cepheids in the Milky Way. We used a relatively modest number of 76 stars for the PL and 84-85 sta
Externí odkaz:
http://arxiv.org/abs/2306.06326
Autor:
Zgirski, Bartłomiej, Pietrzyński, Grzegorz, Górski, Marek, Gieren, Wolfgang, Wielgórski, Piotr, Karczmarek, Paulina, Hajdu, Gergely, Lewis, Megan, Chini, Rolf, Graczyk, Dariusz, Kałuszyński, Mikołaj, Narloch, Weronika, Pilecki, Bogumił, García, Gonzalo Rojas, Suchomska, Ksenia, Taormina, Mónica
We present new period-luminosity and period-luminosity-metallicity relations for Galactic RR Lyrae stars based on a sample of 28 pulsators located at distances up to $1.5$ kpc from the Sun. Near-infrared photometry was obtained at the Cerro Armazones
Externí odkaz:
http://arxiv.org/abs/2305.09414
Autor:
Karczmarek, Paulina, Hajdu, Gergely, Pietrzyński, Grzegorz, Gieren, Wolfgang, Narloch, Weronika, Smolec, Radosław, Wiktorowicz, Grzegorz, Belczynski, Krzysztof
Because of their period-luminosity relation (PLR), classical Cepheids play a key role in the calibration of the extragalactic distance scale and the determination of the Hubble-Lema\^{i}tre constant $H_0$. Recent findings show that the majority of cl
Externí odkaz:
http://arxiv.org/abs/2303.15664
Autor:
Pilecki, Bogumił, Thompson, Ian B., Espinoza-Arancibia, Felipe, Anderson, Richard I., Gieren, Wolfgang, Narloch, Weronika, Minniti, Javier, Pietrzyński, Grzegorz, Taormina, Mónica, Bono, Giuseppe, Hajdu, Gergely
Publikováno v:
2022, ApJL, 940, L48
We report the discovery of a surprising binary configuration of the double-mode Cepheid OGLE-LMC-CEP-1347 pulsating in the first (P_1=0.690d) and second overtone (P_2=0.556d) modes. The orbital period (P_orb=59d) of the system is five times shorter t
Externí odkaz:
http://arxiv.org/abs/2212.04518
Autor:
Karczmarek, Paulina, Smolec, Radosław, Hajdu, Gergely, Pietrzyński, Grzegorz, Gieren, Wolfgang, Narloch, Weronika, Wiktorowicz, Grzegorz, Belczynski, Krzysztof
Publikováno v:
The Astrophysical Journal, Volume 930, Issue 1, id.65 (2022)
The majority of classical Cepheids are binary stars, yet the contribution of companions' light to the total brightness of the system has been assumed negligible and lacked a thorough, quantitative evaluation. We present an extensive study of syntheti
Externí odkaz:
http://arxiv.org/abs/2204.00661
Autor:
Wielgórski, Piotr, Pietrzyński, Grzegorz, Pilecki, Bogumił, Gieren, Wolfgang, Zgirski, Bartłomiej, Górski, Marek, Hajdu, Gergely, Narloch, Weronika, Karczmarek, Paulina, Smolec, Radosław, Kervella, Pierre, Storm, Jesper, Gallenne, Alexandre, Breuval, Louise, Lewis, Megan, Kałuszyński, Mikołaj, Graczyk, Dariusz, Pych, Wojciech, Suchomska, Ksenia, Taormina, Mónica, Garcia, Gonzalo Rojas, Kotek, Aleksandra, Chini, Rolf, Nuñez, Francisco Pozo, Noroozi, Sadegh, Figaredo, Catalina Sobrino, Haas, Martin, Hodapp, Klaus, Mikołajczyk, Przemysław, Kotysz, Krzysztof, Moździerski, Dawid, Kołaczek-Szymański, Piotr
We present time-series photometry of 21 nearby Type II Cepheids in the near-infrared J, H and Ks passbands. We use this photometry, together with the Third Gaia Early Data Release parallaxes, to determine for the first time period-luminosity relation
Externí odkaz:
http://arxiv.org/abs/2112.12122