Zobrazeno 1 - 10
of 154
pro vyhledávání: '"Ágnes Kóspál"'
Autor:
John Wendeborn, Catherine C. Espaillat, Thanawuth Thanathibodee, Connor E. Robinson, Caeley V. Pittman, Nuria Calvet, Ágnes Kóspál, Konstantin N. Grankin, Fredrick M. Walter, Zhen Guo, Jochen Eislöffel
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 96 (2024)
Classical T Tauri stars (CTTSs) are young, low-mass stars that accrete material from their surrounding protoplanetary disk. To better understand accretion variability, we conducted a multiepoch, multiwavelength photometric monitoring campaign of four
Externí odkaz:
https://doaj.org/article/67c999fca97744559398fa387b042f73
Autor:
John Wendeborn, Catherine C. Espaillat, Sophia Lopez, Thanawuth Thanathibodee, Connor E. Robinson, Caeley V. Pittman, Nuria Calvet, Nicole Flors, Fredrick M. Walter, Ágnes Kóspál, Konstantin N. Grankin, Ignacio Mendigutía, Hans Moritz Günther, Jochen Eislöffel, Zhen Guo, Kevin France, Eleonora Fiorellino, William J. Fischer, Péter Ábrahám, Gregory J. Herczeg
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 118 (2024)
The classical T Tauri star (CTTS) stage is a critical phase of the star and planet formation process. In an effort to better understand the mass accretion processes, which can dictate future stellar evolution and planet formation, a multiepoch, multi
Externí odkaz:
https://doaj.org/article/10ae666475744b0ea89e7e9f86707260
Autor:
Ava Nederlander, Adele Plunkett, Antonio Hales, Ágnes Kóspál, Jacob A. White, Makoto A. Johnstone, Mária Kun, Péter Ábrahám, Anna G. Hughes
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 49 (2024)
Young protostars that undergo episodic accretion can provide insight into the impact on their circumstellar environments while matter is accreted from the disk onto the protostar. IRAS 22343+7501 is a four-component protostar system with one of those
Externí odkaz:
https://doaj.org/article/617fe4d393a34ae49484a5c4f603bacb
Autor:
Philipp Weber, Sebastián Pérez, Alice Zurlo, James Miley, Antonio Hales, Lucas Cieza, David Principe, Miguel Cárcamo, Antonio Garufi, Ágnes Kóspál, Michihiro Takami, Joel Kastner, Zhaohuan Zhu, Jonathan Williams
Publikováno v:
The Astrophysical Journal Letters, Vol 952, Iss 1, p L17 (2023)
The formation of giant planets has traditionally been divided into two pathways: core accretion and gravitational instability. However, in recent years, gravitational instability has become less favored, primarily due to the scarcity of observations
Externí odkaz:
https://doaj.org/article/f2c6a812164043cb9d47237d16aeabf7
Autor:
Ágnes Kóspál, Péter Ábrahám, Lindsey Diehl, Andrea Banzatti, Jeroen Bouwman, Lei Chen, Fernando Cruz-Sáenz de Miera, Joel D. Green, Thomas Henning, Christian Rab
Publikováno v:
The Astrophysical Journal Letters, Vol 945, Iss 1, p L7 (2023)
EX Lup is a low-mass pre-main-sequence star that occasionally shows accretion-related outbursts. Here, we present JWST/MIRI medium-resolution spectroscopy obtained for EX Lup 14 yr after its powerful outburst. EX Lup is now in quiescence and displays
Externí odkaz:
https://doaj.org/article/b202588a6c8a4796bb6918dbf0290802
Autor:
Konstantin V. Getman, Ágnes Kóspál, Nicole Arulanantham, Dmitry A. Semenov, Grigorii V. Smirnov-Pinchukov, Sierk E. van Terwisga
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 98 (2023)
DQ Tau is a unique young high-eccentricity binary system that exhibits regular magnetic reconnection flares and pulsed accretion near periastron. We conducted NuSTAR, Swift, and Chandra observations during the 2022 July 30 periastron to characterize
Externí odkaz:
https://doaj.org/article/fdd3662c897b496ebb2afdb3e0f79e5d
Autor:
Eleonora Fiorellino, Łukasz Tychoniec, Fernando Cruz-Sáenz de Miera, Simone Antoniucci, Ágnes Kóspál, Carlo F. Manara, Brunella Nisini, Giovanni Rosotti
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 2, p 135 (2023)
Stars collect most of their mass during the protostellar stage, yet the accretion luminosity and stellar parameters, which are needed to compute the mass accretion rate, are poorly constrained for the youngest sources. The aim of this work is to fill
Externí odkaz:
https://doaj.org/article/2fd549ef2a554912a49844483bf55398
Autor:
Nicole Arulanantham, Max Gronke, Eleonora Fiorellino, Jorge Filipe Gameiro, Antonio Frasca, Joel Green, Seok-Jun Chang, Rik A. B. Claes, Catherine C. Espaillat, Kevin France, Gregory J. Herczeg, Carlo F. Manara, Laura Venuti, Péter Ábrahám, Richard Alexander, Jerome Bouvier, Justyn Campbell-White, Jochen Eislöffel, William J. Fischer, Ágnes Kóspál, Miguel Vioque
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 2, p 185 (2023)
T Tauri stars produce broad Ly α emission lines that contribute ∼88% of the total UV flux incident on the inner circumstellar disks. Ly α photons are generated at the accretion shocks and in the protostellar chromospheres and must travel through
Externí odkaz:
https://doaj.org/article/63588fca76104adeacd7a57defb07da5
Autor:
Fernando Cruz-Sáenz de Miera, Ágnes Kóspál, Péter Ábrahám, Timea Csengeri, Orsolya Fehér, Rolf Güsten, Thomas Henning
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 1, p 80 (2023)
The FU Orionis–type objects (FUors) are low-mass pre-main-sequence objects that go through a short-lived phase (∼100 yr) of increased mass accretion rate (from 10 ^−8 to 10 ^−4 M _⊙ yr ^−1 ). These eruptive young stars are in the early st
Externí odkaz:
https://doaj.org/article/34b876696b5e4334a7cecba11df7aa7a
Autor:
Justyn Campbell-White, Carlo F. Manara, Aurora Sicilia-Aguilar, Antonio Frasca, Louise D. Nielsen, P. Christian Schneider, Brunella Nisini, Amelia Bayo, Barbara Ercolano, Péter Ábrahám, Rik Claes, Min Fang, Davide Fedele, Jorge Filipe Gameiro, Manuele Gangi, Ágnes Kóspál, Karina Maucó, Monika G. Petr-Gotzens, Elisabetta Rigliaco, Connor Robinson, Michal Siwak, Lukasz Tychoniec, Laura Venuti
Absorption features in stellar atmospheres are often used to calibrate photocentric velocities for kinematic analysis of further spectral lines. The Li feature at $\sim$ 6708 {\AA} is commonly used, especially in the case of young stellar objects for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7f95d6cde2bd4694b0c30b48f004eca
http://arxiv.org/abs/2303.03843
http://arxiv.org/abs/2303.03843