Zobrazeno 1 - 10
of 279
pro vyhledávání: '"Wolfgang Gieren"'
Autor:
Nancy Remage Evans, Alexandre Gallenne, Pierre Kervella, Antoine Mérand, John Monnier, Richard I Anderson, H. Moritz Günther, Charles Proffitt, Elaine M. Winston, Grzegorz Pietrzynski, Wolfgang Gieren, Joanna Kuraszkiewicz, Narsireddy Anugu, Rachael M. Roettenbacher, Cyprien Lanthermann, Mayra Gutierrez, Gail Schaefer, Benjamin R. Setterholm, Noura Ibrahim, Stefan Kraus
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 145 (2024)
The Cepheid AW Per is a component in a multiple system with a long-period orbit. The radial velocities of Griffin cover the 38 yr orbit well. An extensive program of interferometry with the Center for High Angular Resolution Astronomy array is report
Externí odkaz:
https://doaj.org/article/05c127c3eae6454381619399bc24a007
Autor:
Weronika Narloch, Gergely Hajdu, Grzegorz Pietrzyński, Wolfgang Gieren, Piotr Wielgórski, Bartłomiej Zgirski, Paulina Karczmarek, Marek Górski, Dariusz Graczyk
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 14 (2023)
We present the first period–luminosity (PL) and period–Wesenheit (PW) relations in the Sloan–Pan-STARRS g _P _1 r _P _1 i _P _1 bands for classical fundamental-mode Cepheids in the Milky Way. We used a relatively modest number of 76 stars for t
Externí odkaz:
https://doaj.org/article/38e8bfd209cc499d88f1d15fb288025d
Autor:
Bartłomiej Zgirski, Grzegorz Pietrzyński, Marek Górski, Wolfgang Gieren, Piotr Wielgórski, Paulina Karczmarek, Gergely Hajdu, Megan Lewis, Rolf Chini, Dariusz Graczyk, Mikołaj Kałuszyński, Weronika Narloch, Bogumił Pilecki, Gonzalo Rojas García, Ksenia Suchomska, Mónica Taormina
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 2, p 114 (2023)
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 of up to 1.5 kpc from the Sun. Near-infrared photometry was obtained at the Cerro Ar
Externí odkaz:
https://doaj.org/article/dec12221606e4c95b450e42db4ea060c
Autor:
Paulina Karczmarek, Gergely Hajdu, Grzegorz Pietrzyński, Wolfgang Gieren, Weronika Narloch, Radosław Smolec, Grzegorz Wiktorowicz, Krzysztof Belczynski
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 182 (2023)
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–Lemaître constant H _0 . Recent findings show that the majority of c
Externí odkaz:
https://doaj.org/article/d7f1e5f4337544369a1df9a9d873b4ea
Autor:
Bogumił Pilecki, Ian B. Thompson, Felipe Espinoza-Arancibia, Richard I. Anderson, Wolfgang Gieren, Weronika Narloch, Javier Minniti, Grzegorz Pietrzyński, Mónica Taormina, Giuseppe Bono, Gergely Hajdu
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fccbecd68f2ec0bf8d6cd6b4b50e219f
http://arxiv.org/abs/2212.04518
http://arxiv.org/abs/2212.04518
Autor:
Paulina Karczmarek, Radosław Smolec, Gergely Hajdu, Grzegorz Pietrzyński, Wolfgang Gieren, Weronika Narloch, Grzegorz Wiktorowicz, Krzysztof Belczynski
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99a691212291874138bd0fec79fabc43
Autor:
Wolfgang Gieren, Nicolas Nardetto, V. Hocdé, Pierre Kervella, Alexandre Gallenne, L. Breuval, Antoine Mérand, Boris Trahin
Publikováno v:
Astronomy & Astrophysics
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, ⟨10.1051/0004-6361/202141680⟩
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, ⟨10.1051/0004-6361/202141680⟩
As primary anchors of the distance scale, Cepheid stars play a crucial role in our understanding of the distance scale of the Universe because of their period-luminosity relation. Determining precise and consistent parameters (radius, temperature, co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a2e7f8ed8f4f772f76d6de9186ef92a
http://arxiv.org/abs/2111.09125
http://arxiv.org/abs/2111.09125
Autor:
Wolfgang Gieren, Bogumił Pilecki, Fabio Bresolin, Gergely Hajdu, Rolf-Peter Kudritzki, Marek Górski, Piotr Wielgórski, W. Narloch, Dariusz Graczyk, Pierre Kervella, Grzegorz Pietrzyński, Bartłomiej Zgirski, Jesper Storm, Ksenia Suchomska, Paulina Karczmarek, Mónica Taormina
Publikováno v:
Astrophysical Journal
Our work presents an independent calibration of the J-region Asymptotic Giant Branch (JAGB) method using Infrared Survey Facility (IRSF) photometric data and a custom luminosity function profile to determine JAGB mean magnitudes for nine galaxies. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbd8492ffaf5d6c9ff40477c422cd911
http://arxiv.org/abs/2105.02120
http://arxiv.org/abs/2105.02120
Autor:
Bogumił Pilecki, Wolfgang Gieren, Grzegorz Pietrzyński, P. Wielgórski, Dariusz Graczyk, W. Narloch, M. Gorski, Gergely Hajdu, Andrés E. Piatti, G. Rojas García, Paulina Karczmarek, Bartłomiej Zgirski, Wojciech Pych, M. Kałuszyński, K. Suchomska, Mónica Taormina
Publikováno v:
Astronomy & Astrophysics
In this work we study 35 stellar clusters in the Small Magellanic Cloud (SMC) in order to provide their mean metallicities and ages. We also provide mean metallicities of the fields surrounding the clusters. We used Str\"omgren photometry obtained wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17fcdf42838d01bfb7fcb8164a7c6770
http://arxiv.org/abs/2101.12734
http://arxiv.org/abs/2101.12734
Autor:
Piotr Wielgórski, Mradumay Sadh, Bogumił Pilecki, Marek Górski, Bartłomiej Zgirski, Mónica Taormina, Grzegorz Pietrzyński, M. Kałuszyński, Paulina Karczmarek, Ksenia Suchomska, Gonzalo Rojas García, Gergely Hajdu, Dariusz Graczyk, Wolfgang Gieren, W. Narloch
Publikováno v:
The Astrophysical Journal Supplement Series
Deep near-infrared $J$- and $K$-band photometry of three Local Group dwarf spheroidal galaxies: Fornax, Carina, and Sculptor, is made available for the community. Until now, these data have only been used by the Araucaria Project to determine distanc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fd81ba3c3b6c3530f16cd71da22a2c2
http://arxiv.org/abs/2101.09888
http://arxiv.org/abs/2101.09888