Zobrazeno 1 - 10
of 689
pro vyhledávání: '"Gallenne A"'
Autor:
Evans, Nancy Remage, Kervella, Pierre, Kuraszkiewicz, Joanna, Günther, H. Moritz, Anderson, Richard I., Proffitt, Charles, Gallenne, Alexandre, Mérand, Antoine, Trahin, Boris, Viviani, Giordano, Shetye, Shreeya
Cepheid masses continue to be important tests of evolutionary tracks for intermediate mass stars as well as important predictors of their future fate. For systems where the secondary is a B star, {\it Hubble Space Telescope} ultraviolet spectra have
Externí odkaz:
http://arxiv.org/abs/2410.01934
Autor:
Evans, Nancy Remage, Schaefer, Gail, Gallenne, Alexandre, Torres, Guillermo, Horch, Elliot P., Anderson, Richard I, Monnier, John, Roettenbacher, Rachael M., Baron, Fabien, Anugu, Narsireddy, Davidson, Jr., James W., Kervella, Pierre, Bras, Garance, Proffitt, Charles, Mérand, Antoine, Karovska, Margarita, Jones, Jeremy, Lanthermann, Cyprien, Kraus, Stefan, Codron, Isabelle, Bond, Howard E., Viviani, Giordano
The 30 year orbit of the Cepheid Polaris has been followed with observations by the CHARA Array (Center for High Angular Resolution Astronomy) from 2016 through 2021. An additional measurement has been made with speckle interferometry at the Apache P
Externí odkaz:
http://arxiv.org/abs/2407.09641
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:
Nardetto, N., Hocdé, V., Kervella, P., Gallenne, A., Gieren, W., Graczyk, D., Merand, A., Rainer, M., Storm, J., Pietrzynski, G., Pilecki, B., Poretti, E., Bailleul, M., Afanasiev, G. Bras A.
An inner companion has recently been discovered orbiting the prototype of classical Cepheids, delta Cep, whose orbital parameters are still not fully constrained. We collected new precise radial velocity measurements of delta Cep in 2019 using the HA
Externí odkaz:
http://arxiv.org/abs/2404.01851
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:
Project, The Araucaria, Pietrzyński, G., Gieren, W., Karczmarek, P., Górski, M., Zgirski, B., Wielgórski, P., Breuval, L., Suchomska, K., Gallenne, A., Kervella, P., Hajdu, G., Pilecki, B., Storm, J., Nardetto, N., Kudritzki, R. P., Taormina, M., Bresolin, F., Smolec, R., Narloch, W., Gałan, C., Lewis, M., Chini, R.
Publikováno v:
Published on behalf of the Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences. Editors: P. Karczmarek, M. Lewis, G. Pietrzy\'nski. Publisher: Wydawnictwo Aleksander, Pu{\l}tusk 2021. ISBN: 978-83-66856-07-3
The book consists of a number of short articles that present achievements of the Araucaria members, collaborators, and friends, in various aspects of distance determinations and related topics. It celebrates the 20-year anniversary of the Araucaria P
Externí odkaz:
http://arxiv.org/abs/2305.17247
Autor:
Gallenne, A., Mérand, A., Kervella, P., Graczyk, D., Pietrzyński, G., Gieren, W., Pilecki, B.
Publikováno v:
A&A 672, A119 (2023)
We aim to measure very precise and accurate model-independent masses and distances of detached binary stars. Precise masses at the $< 1$% level are necessary to test and calibrate stellar interior and evolution models, while precise and independent o
Externí odkaz:
http://arxiv.org/abs/2302.12960
Autor:
Nardetto, N., Gieren, W., Storm, J., Hocde, V., Pietrzynski, G., Kervella, P., Merand, A., Gallenne, A., Graczyk, D., Pilecki, B., Poretti, E., Rainer, M., Zgirski, B., Wielgorski, P., Hajdu, G., Gorski, M., Karczmarek, P., Narloch, W., Taormina, M.
Publikováno v:
A&A 671, A14 (2023)
The Baade-Wesselink (BW) method of distance determination of Cepheids is used to calibrate the distance scale. Various versions of this method are mainly based on interferometry and/or the surface-brightness color relation (SBCR). We quantify the imp
Externí odkaz:
http://arxiv.org/abs/2301.09468
Autor:
Chauvin, G., Videla, M., Beust, H., Mendez, R., Correia, A. C. M., Lacour, S., Tokovinin, A., Hagelberg, J., Bouchy, F., Boisse, I., Villegas, C., Bonavita, M., Desidera, S., Faramaz, V., Forveille, T., Gallenne, A., Haubois, X., Jenkins, J. S., Kervella, P., Lagrange, A. -M., Melo, C., Thebault, P., Udry, S., Segransan, D.
Publikováno v:
A&A 675, A114 (2023)
Planet(s) in binaries are unique architectures for testing predictions of planetary formation and evolution theories in very hostile environments. We used the IRDIS dual-band imager of SPHERE at VLT, and the speckle interferometric camera HRCAM of SO
Externí odkaz:
http://arxiv.org/abs/2211.00994
Autor:
Kammerer, Jens, Cooper, Rachel A., Vandal, Thomas, Thatte, Deepashri, Martinache, Frantz, Sivaramakrishnan, Anand, Chaushev, Alexander, Stolker, Tomas, Lloyd, James P., Albert, Loïc, Doyon, René, Sallum, Steph, Perrin, Marshall D., Pueyo, Laurent, Mérand, Antoine, Gallenne, Alexandre, Greenbaum, Alexandra, Sanchez-Bermudez, Joel, Blakely, Dori, Johnstone, Doug, Volk, Kevin, Martel, Andre, Goudfrooij, Paul, Meyer, Michael R., Willott, Chris J., De Furio, Matthew, Dang, Lisa, Radica, Michael, Noirot, Gaël
Kernel phase imaging (KPI) enables the direct detection of substellar companions and circumstellar dust close to and below the classical (Rayleigh) diffraction limit. We present a kernel phase analysis of JWST NIRISS full pupil images taken during th
Externí odkaz:
http://arxiv.org/abs/2210.17528