Results 121 to 130 of about 14,826 (213)

The Periastron Passage of T Tauri South B as Viewed by ALMA: Millimeter Flux Variations and Dust Heating Triggered by Orbital Motion

The Astrophysical Journal
We present 225 and 350 GHz imaging of the iconic T Tauri system using the Atacama Large Millimeter submillimeter Array (ALMA). T Tauri is a hierarchical triple system, and the close binary T Tau Sa/Sb underwent periastron passage in 2023 March.
Tracy L. Beck, Stephane Guilloteau, Gail Schaefer, Edwige Chapillon, Anne Dutrey, Emmanuel Di Folco   +5 more
doaj   +1 more source

Active Young Stars in the LAMOST–Kepler Survey

The Astrophysical Journal Supplement Series
In the early stages of their lives, young stars harbor diverse processes exhibiting strong signatures, making them ideal targets for investigating stellar accretion, dynamo actions, and exoplanet formation.
FuKun Xu, Shenghong Gu, Yue Xiang
doaj   +1 more source

Constrictive Pericarditis in the Light of Multimodal Cardiac Imaging. A Case Report. [PDF]

Maedica (Bucur), 2023
Darabont RO, Ene C, Nicula AI, Badiu CC, Vinereanu D.   +4 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

Gone with the Molecular Wind: Photoevaporation in the Compact Dust Disk around CX Tau

The Astrophysical Journal
We present Keck NIRSPEC+AO high-resolution ( R ∼ 25,000), mid-infrared ( M -band: 4.6–5.2 μ m) spectra of the protoplanetary disk CX Tau. CX Tau provides an ideal laboratory to study inner disk chemistry in a disk where the signs of radial drift of ...
Alexa R. Anderson, Jonathan P. Williams, Geoff A. Blake, Klaus M. Pontoppidan, Colette Salyk, A. C. Adwin Boogert, Clara Ross, L. Ilsedore Cleeves   +7 more
doaj   +1 more source

On a Possible Solution to the Tidal Realignment Problem for Hot Jupiters. [PDF]

Astrophys J, 2021
Anderson KR, Winn JN, Penev K.
europepmc   +1 more source

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

Using the Ca ii Lines in T Tauri Stars to Infer the Abundance of Refractory Elements in the Innermost Disk Region

The Astrophysical Journal
We present a study of the abundance of calcium in the innermost disk of 70 T Tauri stars in the star-forming regions of Chamaeleon I, Lupus, and Orion OB1b. We use calcium as a proxy for the refractory material that reaches the inner disk.
Marbely Micolta, Nuria Calvet, Thanawuth Thanathibodee, Gladis Magris C., Carlo F. Manara, Laura Venuti, Juan Manuel Alcalá, Gregory J. Herczeg   +7 more
doaj   +1 more source

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

Vanishing Refractories: Tracing Dust Evolution in the BP Tau Protoplanetary Disk

The Astrophysical Journal
We present a multiwavelength analysis of the dust of BP Tau’s protoplanetary disk. We use new optical spectra of BP Tau, taken with the Magellan/Magellan Inamori Kyocera Echelle spectrograph in tandem with archival UV and mid-infrared observations.
Marbely Micolta, Justin Svarc, Nuria Calvet, Ezequiel Manzo-Martínez, Thanawuth Thanathibodee, Gladis Magris C., Avalon Littwiller   +6 more
doaj   +1 more source