Zobrazeno 1 - 10
of 224
pro vyhledávání: '"Kóspál, Ágnes"'
Autor:
Xie, Chengyan, Pascucci, Ilaria, Deng, Dingshan, Bajaj, Naman S., Alexander, Richard, Sellek, Andrew, Kospal, Agnes, Ballabio, Giulia, Gorti, Uma
We present JWST/MIRI observations of T~Cha, a highly variable ($\Delta V \sim$3-5\,mag) accreting Sun-like star surrounded by a disk with a large ($\sim 15$\,au) dust gap. We find that the JWST mid-infrared spectrum is signiticantly different from th
Externí odkaz:
http://arxiv.org/abs/2410.00136
EX Lupi is the prototype of EX Lup-type stars, meaning classical T Tauri stars (cTTSs) showing luminosity bursts and outbursts of 1 to 5 magnitudes lasting for a few months to a few years. These events are ascribed to an episodic accretion that can o
Externí odkaz:
http://arxiv.org/abs/2409.03322
Autor:
Wendeborn, John, Espaillat, Catherine C., Thanathibodee, Thanawuth, Robinson, Connor E., Pittman, Caeley V., Calvet, Nuria, Muzerolle, James, Walter, Fredrick M., Eisloffel, Jochen, Fiorellino, Eleonora, Manara, Carlo F., Kospal, Agnes, Abraham, Peter, Claes, Rik, Rigliaco, Elisabetta, Venuti, Laura, Campbell-White, Justyn, McGinnis, Pauline, Gangi, Manuele, Mauco, Karina, Gameiro, Filipe, Frasca, Antonio, Guo, Zhen
Classical T Tauri Stars (CTTSs) are highly variable stars that possess gas- and dust-rich disks from which planets form. Much of their variability is driven by mass accretion from the surrounding disk, a process that is still not entirely understood.
Externí odkaz:
http://arxiv.org/abs/2408.04465
Autor:
Kashyap, Parashmoni, Majumdar, Liton, Dutrey, Anne, Guilloteau, Stéphane, Willacy, Karen, Chapillon, Edwige, Teague, Richard, Semenov, Dmitry, Henning, Thomas, Turner, Neal, Sahai, Raghvendra, Kóspál, Ágnes, Coutens, Audrey, Piétu, V., Gratier, Pierre, Ruaud, Maxime, Phuong, N. T., Di Folco, E., Lee, Chin-Fei, Tang, Y. -W.
Resolved molecular line observations are essential for gaining insight into the physical and chemical structure of protoplanetary disks, particularly in cold, dense regions where planets form and acquire their chemical compositions. However, tracing
Externí odkaz:
http://arxiv.org/abs/2407.07238
Autor:
Flaherty, Kevin, Hughes, A. Meredith, Simon, Jacob B., Reina, Alicia Smith, Qi, Chunhua, Bai, Xue-Ning, Andrews, Sean M., Wilner, David J., Kospal, Agnes
The amount of turbulence in protoplanetary discs around young stars is critical for determining the efficiency, timeline, and outcomes of planet formation. It is also difficult to measure. Observations are still limited, but direct measurements of th
Externí odkaz:
http://arxiv.org/abs/2406.07689
Autor:
Wendeborn, John, Espaillat, Catherine C., Thanathibodee, Thanawuth, Robinson, Connor E., Pittman, Caeley V., Calvet, Nuria, Kóspál, Ágnes, Grankin, Konstantin N., Walter, Fredrick M., Guo, Zhen, Eislöffel, Jochen
Classical T Tauri Stars (CTTSs) are young, low-mass stars which accrete material from their surrounding protoplanetary disk. To better understand accretion variability, we conducted a multi-epoch, multi-wavelength photometric monitoring campaign of f
Externí odkaz:
http://arxiv.org/abs/2405.21071
Autor:
Wendeborn, John, Espaillat, Catherine C., Lopez, Sophia, Thanathibodee, Thanawuth, Robinson, Connor E., Pittman, Caeley V., Calvet, Nuria, Flors, Nicole, Walter, Fredrick M., Kóspál, Ágnes, Grankin, Konstantin N., Mendigutía, Ignacio, Günther, Hans Moritz, Eislöffel, Jochen, Guo, Zhen, France, Kevin, Fiorellino, Eleonora, Fischer, William J., Ábrahám, Péter, Herczeg, Gregory J.
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 process, which can dictate further stellar evolution and planet formation, a multi-epoch, multi
Externí odkaz:
http://arxiv.org/abs/2405.21038
Recent imaging observations with ALMA and other telescopes found widespread signatures of planet presence in protoplanetary discs at tens of au separations from their host stars. Here we point out that the presence of very massive planets at 0.1 au s
Externí odkaz:
http://arxiv.org/abs/2405.09904
Autor:
Fiorellino, Eleonora, Abraham, Peter, Kospal, Agnes, Kun, Maria, Alcala, Juan M., Garatti, Alessio Caratti o, de Miera, Fernando Cruz-Saenz, Garcia-Alvarez, David, Giannini, Teresa, Park, Sunkyung, Siwak, Michal, Szilagyi, Mate, Covino, Elvira, Marton, Gabor, Nagy, Zsofia, Nisini, Brunella, Szabo, Zsofia Marianna, Bora, Zsofia, Cseh, Borbala, Kalup, Csilla, Krezinger, Mate, Kriskovics, Levente, Ogloza, Waldemar, Pal, Andras, Sodor, Adam, Sonbas, Eda, Szakats, Robert, Vida, Krisztian, Vinko, Jozsef, Wyrzykowski, Lukasz, Zielinski, Pawel
Publikováno v:
A&A 686, A160 (2024)
Context. Gaia18cjb is one of the Gaia-alerted eruptive young star candidates which has been experiencing a slow and strong brightening during the last 13 years, similar to some FU Orionis-type objects. Aims. The aim of this work is to derive the youn
Externí odkaz:
http://arxiv.org/abs/2403.08698
Autor:
Nayakshin, Sergei, de Miera, Fernando Cruz Saenz, Kospal, Agnes, Calovic, Aleksandra, Eisloffel, Jochen, Lin, Douglas N. C.
In the classical grouping of large magnitude episodic variability of young accreting stars, FUORs outshine their stars by a factor of $\sim$ 100, and can last for up to centuries; EXORs are dimmer, and last months to a year. A disc Hydrogen ionisatio
Externí odkaz:
http://arxiv.org/abs/2403.04439