Results 121 to 130 of about 7,097 (207)

Monitoring the magnetospheric accretion of the classical T Tauri star DO Tau with SPIRou

Astronomy & Astrophysics
We present observations of the classical T Tauri star DO Tau collected with the near-infrared SPIRou spectropolarimeter and precision velocimeter at the Canada-France-Hawaii Telescope from early 2020 to late 2025.
Donati J.-F., Cristofari P. I., Carmona A., Lavail A., Moutou C., Bouvier J., Perraut K., Alencar S. H. P., Ménard F., Audard M., Petit P., Alecian E., Ray T.   +12 more
doaj   +1 more source

Outflows from the youngest stars are mostly molecular. [PDF]

Nature, 2023
Ray TP, McCaughrean MJ, Caratti O Garatti A, Kavanagh PJ, Justtanont K, van Dishoeck EF, Reitsma M, Beuther H, Francis L, Gieser C, Klaassen P, Perotti G, Tychoniec L, van Gelder M, Colina L, Greve TR, Güdel M, Henning T, Lagage PO, Östlin G, Vandenbussche B, Waelkens C, Wright G.   +22 more
europepmc   +1 more source

Haro 5-2: A New Pre-main-sequence Quadruple Stellar System

The Astronomical Journal
We have discovered that the H α emission-line star Haro 5-2, located in the 3–6 Myr old Ori OB1b association, is a young quadruple system. The system has a 2+2 configuration, with an outer separation of 2.″6 and with resolved subarcsecond inner binary ...
Bo Reipurth, C. Briceño, T. R. Geballe, C. Baranec, S. Mikkola, A. M. Cody, M. S. Connelley, C. Flores, B. A. Skiff, J. D. Armstrong, N. M. Law, R. Riddle   +11 more
doaj   +1 more source

Warm Disk Coronae in Classical T Tauri Stars

The Astrophysical Journal, 1997
It is proposed that a warm disk corona is a characteristic feature of the accretion process in a classical T Tauri star, based on analyses of the [O I] λλ6300, 5577 emission and the central absorptions in the Balmer lines of hydrogen. Calculations are presented to determine the physical conditions needed to produce the hydrogen and O I excitation. They
openaire   +1 more source

Close Companions to T Tauri Stars: Abundant and Perturbing [PDF]

, 1994
The results of a speckle imaging survey of T Tauri stars suggest that most, if not all, young low mass stars have companions. Furthermore, this survey reveals a distinction between the classical T Tauri stars (CTTS) and the weak-lined T Tauri stars ...
Ghez, A. M., McCarthy, D. W., Jr.
core  

Accretion Properties of the Young Brown Dwarf 2MASS J08440915-7833457

The Astrophysical Journal
We present Hubble Space Telescope Cosmic Origins Spectrograph far-ultraviolet (FUV) and Space Telescope Imaging Spectrometer (STIS) optical observations toward the young accreting brown dwarf 2MASS J08440915-7833457 (J0844) from the UV Legacy Library of ...
Toni V. Panzera, Laura S. Flagg, Margaret A. Mueller, Christopher M. Johns-Krull, Gregory J. Herczeg   +4 more
doaj   +1 more source

Stochastic accretion of the Earth. [PDF]

Nat Astron, 2022
Sossi PA, Stotz IL, Jacobson SA, Morbidelli A, O'Neill HSC.   +4 more
europepmc   +1 more source

Coronal abundances of X-ray bright pre-main sequence stars in the Taurus Molecular Cloud

, 2007
We studied the thermal properties and chemical composition of the X-ray emitting plasma of a sample of bright members of the Taurus Molecular Cloud to investigate possible differences among classical and weak-lined T Tauri stars and possible dependences ...
A. Maggio, Alencar, Anders, Argiroffi, Argiroffi, Argiroffi, Audard, Brinkman, Charnley, Drake, Drake, Drake, Drake, Duchêne, Favata, Feldman, Franciosini, G. Micela, Güdel, Güdel, Hartigan, Huenemoerder, K. Briggs, König, L. Scelsi, Laming, Laming, Laming, Laming, M. Güdel, Meyer, Nordström, Robrade, Robrade, Sanz-Forcada, Sanz-Forcada, Savage, Scelsi, Scelsi, Schwadron, Sheeley, Siess, Smith, Stelzer, Strüder, Telleschi, Telleschi, Tsuboi, Widing   +48 more
core   +2 more sources

Cool, warm and hot outflows from CTTS: The FUV view of DG Tau

EPJ Web of Conferences, 2014
Classical T Tauri stars (CTTSs) drive strong outflows with temperatures from about 103 K up to a few 106 K. These outflows regulate the angular momentum balance and are therefore tightly related to the accretion process.
Schneider P. C., Eislöffel J., Güdel M., Günther H.M., Herczeg G., Robrade J., Schmitt J.H.M.M.   +6 more
doaj   +1 more source

The evolution of stars in the Taurus-Auriga T association

, 2007
In a recent study, individual parallaxes were determined for many stars of the Taurus-Auriga T association that are members of the same moving group. We use these new parallaxes to re-address the issue of the relationship between classical T Tauri stars (
Bertout, C., Cabrit, S., Siess, L.
core   +3 more sources