Results 111 to 120 of about 11,325,029 (225)

HOT GAS LINES IN T TAURI STARS

The Astrophysical Journal Supplement Series, 2013
ABSTRACT For Classical T Tauri Stars (CTTSs), the resonance doublets of N v, Si iv, and C iv, as well as the He ii 1640 Å line, trace hot gas flows and act as diagnostics of the accretion process. In this paper we assemble a large high-resolution, high-sensitivity data set of these lines in CTTSs and Weak T Tauri Stars (WTTSs).
Ardila, David, Herczeg, Gregory, Gregory, Scott, Ingleby, Laura, France, Kevin, Brown, Alexander, Edwards, Suzan, Johns-Krull, Christopher, Linsky, Jeffrey, Yang, Hao, Valenti, Jeff, Abgrall, Hervé, Alexander, Richard, Bergin, Edwin, Bethell, Thomas, Brown, Joanna, Calvet, Nuria, Espaillat, Catherine, Hillenbrand, Lynne, Hussain, Gaitee, Roueff, Evelyne, Schindhelm, Eric, Walter, Frederick   +22 more
openaire   +5 more sources

PHOTO-REVERBERATION MAPPING OF A PROTOPLANETARY ACCRETION DISK AROUND A T TAURI STAR

, 2016
Theoretical models and spectroscopic observations of newborn stars suggest that protoplantary disks have an inner "wall" at a distance set by the disk interaction with the star.
Covey, Kevin, Gutermuth, Robert A., Rebull, Luisa M., Morales-Calderón, María, Cody, Ann Marie, Meng, Huan Y.A., Carey, Sean, Güth, Tina, Meng, Huan Y. A., Plavchan, Peter, Covey, Kevin R., Duran-Rojas, Maria C., Ciardi, David, Watson, Alan M., Rieke, George H., Stauffer, John, Meng, Huan, For complete list of authors, see publisher\u27s website.   +17 more
core   +1 more source

JWST-MIRI Spectroscopy of Warm Molecular Emission and Variability in the AS 209 Disk

The Astrophysical Journal
We present MIRI Medium-resolution Spectrograph observations of the large, multi-gapped protoplanetary disk around the T Tauri star AS 209. The observations reveal hundreds of water vapor lines from 4.9–25.5 μ m toward the inner ∼1 au in the disk ...
Carlos E. Romero-Mirza, Karin I. Öberg, Andrea Banzatti, Klaus M. Pontoppidan, Sean M. Andrews, David J. Wilner, Edwin A. Bergin, Ian Czekala, Charles J. Law, Colette Salyk, Richard Teague, Chunhua Qi, Jennifer B. Bergner, Jane Huang, Catherine Walsh, Viviana V. Guzmán, L. Ilsedore Cleeves, Yuri Aikawa, Jaehan Bae, Alice S. Booth, Gianni Cataldi, John D. Ilee, Romane Le Gal, Feng Long, Ryan A. Loomis, François Menard, Yao Liu   +26 more
doaj   +1 more source

A Multiwavelength, Multiepoch Monitoring Campaign of Accretion Variability in T Tauri Stars from the ODYSSEUS Survey. I. HST Far-UV and Near-UV Spectra

The Astrophysical Journal
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 ...
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   +19 more
doaj   +1 more source

Mapping Molecular Ion Distributions in a Diverse Sample of Protoplanetary Disks

The Astrophysical Journal
Observations of ionization-tracing molecules in protoplanetary disks suggest that their ionization environments are diverse due to varying degrees of cosmic-ray modulation, stellar activity, and environmental differences that alter the impact of ionizing
Deryl E. Long, L. Ilsedore Cleeves, Charles J. Law, Fred C. Adams, Dana E. Anderson, Sean M. Andrews, Edwin A. Bergin, Jane Huang, A. Meredith Hughes, Chunhua Qi, Kamber R. Schwarz, Jacob B. Simon, David Wilner   +12 more
doaj   +1 more source

Spectrophotometric analysis of the T Tauri star GQ Lupi A

, 2008
Context. GQ Lup A is a classical T Tauri star that shows clear signs of accretion through the presence of inverse P Cygni profiles in its main emission lines. Recently, Neuhäuser et al.
S. H. P. Alencar, D. Lopes, E. Seperuelo Duarte, C. Batalha   +3 more
core   +1 more source

Accretion dynamics in the classical T Tauri star V2129 Ophiuchi

, 2012
Context. Classical T Tauri stars are variable objects on several timescales, but just a few of them have been studied in detail, with different observational techniques and over many rotational cycles to enable the analysis of the stellar and ...
Massaro, S., Bouvier, J., J.-F. Donati, Dougados, C., Bonfils, X., S. H. P. Alencar, C. Dougados, G. H. R. A. Lima, Alencar, S. H. P., Donati, J. -F., F. M. Walter, Romanova, M., Lima, G. H. R. A., R. Kurosawa, M. Ibrahimov, E. Poretti, X. Bonfils, M. Romanova, S. Massaro, J. Bouvier, Poretti, E., Ibrahimov, M., Walter, F. M., Kurosawa, R.   +23 more
core   +1 more source

Water in the terrestrial planet-forming zone of the PDS 70 disk. [PDF]

Nature, 2023
Perotti G, Christiaens V, Henning T, Tabone B, Waters LBFM, Kamp I, Olofsson G, Grant SL, Gasman D, Bouwman J, Samland M, Franceschi R, van Dishoeck EF, Schwarz K, Güdel M, Lagage PO, Ray TP, Vandenbussche B, Abergel A, Absil O, Arabhavi AM, Argyriou I, Barrado D, Boccaletti A, Caratti O Garatti A, Geers V, Glauser AM, Justannont K, Lahuis F, Mueller M, Nehmé C, Pantin E, Scheithauer S, Waelkens C, Guadarrama R, Jang H, Kanwar J, Morales-Calderón M, Pawellek N, Rodgers-Lee D, Schreiber J, Colina L, Greve TR, Östlin G, Wright G.   +44 more
europepmc   +1 more source

When the Wall Fell: Study of Polycyclic Aromatic Hydrocarbons in T Chamaeleontis Using JWST

The Astronomical Journal
We investigate the polycyclic aromatic hydrocarbon (PAH) emission features of T Cha, a G8-type T Tauri star that has exhibited “seesaw”-type mid-infrared continuum variability over nearly two decades due to the destruction of the disk’s inner wall, using
R. Arun
doaj   +1 more source

The GRAVITY young stellar object survey

Astronomy & Astrophysics
Context. Protoplanetary disks around young Sun-like stars are the cradles of the vast majority of detected exoplanets. Probing these disks at multiple spatial scales is key to uncovering how planets form.
Perraut K., Bouvier J., Nowacki H., Sousa A., Houllé M., Donati J.F., Alecian E., Alencar S., Audard M., Berger J.-P., Bouarour Y.-I., Bordier E., Bourdarot G., Carmona A., Caratti o Garatti A., Dougados C., Flock M., Garcia-Lopez R., Grankin K., Kóspál Á., Labadie L., Moutou C., Sanchez-Bermudez J., Shang H., Takami M., Amorim A., Brandner W., Clénet Y., Davies R., Dembet R., Drescher A., Eckart A., Eisenhauer F., Fabricius M., Feuchtgruber H., Förster-Schreiber N. M., Garcia P., Gendron E., Genzel R., Gillessen S., Henning T., Jocou L., Joharle S., Kervella P., Kreidberg L., Lacour S., Lapeyrère V., Le Bouquin J.-B., Lutz D., Mang F., Ott T., Paumard T., Perrin G., Rabien S., Ribeiro D. C., Sadun Bordoni M., Santos D., Shangguan J., Shimizu T., Straubmeier C., Sturm E., Tacconi L., Vincent F.   +62 more
doaj   +1 more source