Results 41 to 50 of about 172,294 (371)

Salt-bearing Disk Candidates around High-mass Young Stellar Objects

The Astrophysical Journal, 2023
Molecular lines tracing the orbital motion of gas in a well-defined disk are valuable tools for inferring both the properties of the disk and the star it surrounds. Lines that arise only from a disk, and not also from the surrounding molecular cloud core
Adam Ginsburg, Brett A. McGuire, Patricio Sanhueza, Fernando Olguin, Luke T. Maud, Kei E. I. Tanaka, Yichen Zhang, Henrik Beuther, Nick Indriolo   +8 more
doaj   +1 more source

The SEEDS High-Contrast Imaging Survey of Exoplanets Around Young Stellar Objects [PDF]

, 2016
We present high-contrast observations of 68 young stellar objects (YSOs) that have been explored as part of the Strategic Exploration of Exoplanets and Disks with Subaru (SEEDS) survey on the Subaru telescope. Our targets are very young (
T. Uyama, J. Hashimoto, M. Kuzuhara, S. Mayama, E. Akiyama, T. Currie, J. Livingston, T. Kudo, N. Kusakabe, L. Abe, W. Brandner, Timothy D. Brandt, J. Carson, S. Egner, M. Feldt, M. Goto, C. Grady, O. Guyon, Y. Hayano, M. Hayashi, S. Hayashi, T. Henning, K. Hodapp, M. Ishii, M. Iye, M. Janson, R. Kandori, G. Knapp, J. Kwon, T. Matsuo, M. McElwain, S. Miyama, J. Morino, A. Moro-Martin, T. Nishimura, T. Pyo, E. Serabyn, T. Suenaga, H. Suto, R. Suzuki, Yasuhiro H. Takahashi, M. Takami, N. Takato, H. Terada, C. Thalmann, E. Turner, Makoto Watanabe, J. Wisniewski, Toru Yamada, H. Takami, T. Usuda, M. Tamura   +51 more
semanticscholar   +1 more source

Apparent Disk-mass Reduction and Planetisimal Formation in GravitationallyUnstable Disks in Class 0/I Young Stellar Objects [PDF]

, 2016
We investigate the dust structure of gravitationally unstable disks undergoing mass accretion from the envelope, envisioning its application to Class 0/I young stellar objects (YSOs).
Y. Tsukamoto, S. Okuzumi, A. Kataoka
semanticscholar   +1 more source

300: An ACA 870 μm Continuum Survey of Orion Protostars and Their Evolution

The Astrophysical Journal, 2023
We present an 870 μ m continuum survey of 300 protostars from the Herschel Orion Protostar Survey using the Atacama Compact Array (ACA). These data measure protostellar flux densities on envelope scales ≤8000 au (20″) and resolve the structure of ...
Samuel Federman, S. Thomas Megeath, John J. Tobin, Patrick D. Sheehan, Riwaj Pokhrel, Nolan Habel, Amelia M. Stutz, William J. Fischer, Lee Hartmann, Thomas Stanke, Mayank Narang, Mayra Osorio, Prabhani Atnagulov, Rohan Rahatgaonkar   +13 more
doaj   +1 more source

SPITZER OBSERVATIONS OF LONG-TERM INFRARED VARIABILITY AMONG YOUNG STELLAR OBJECTS IN CHAMAELEON I [PDF]

, 2016
Infrared variability is common among young stellar objects, with surveys finding daily to weekly fluctuations of a few tenths of a magnitude. Space-based observations can produce highly sampled infrared light curves, but are often limited to total ...
K. Flaherty, Lindsay DeMarchi, Lindsay DeMarchi, J. Muzerolle, Z. Balog, W. Herbst, S. Megeath, E. Furlan, R. Gutermuth   +8 more
semanticscholar   +1 more source

An APEX Study of Molecular Outflows in FUor-type Stars

The Astrophysical Journal, 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 ).
Fernando Cruz-Sáenz de Miera, Ágnes Kóspál, Péter Ábrahám, Timea Csengeri, Orsolya Fehér, Rolf Güsten, Thomas Henning   +6 more
doaj   +1 more source

Distances to Nearby Molecular Clouds Traced by Young Stars

The Astrophysical Journal Supplement Series, 2023
I present a catalog of distances to 63 molecular clouds located within ∼2.5 kpc of the Sun. The cloud distances are derived based on utilizing the Gaia DR3 parallaxes of the young stellar objects (YSOs). By identifying AllWISE YSO candidates (YSOCs) with
Miaomiao Zhang
doaj   +1 more source

Measurement of the Angular Momenta of Pre-main-sequence Stars: Early Evolution of Slow and Fast Rotators and Empirical Constraints on Spin-down Torque Mechanisms

The Astronomical Journal, 2023
We use TESS full-frame imaging data to investigate the angular momentum evolution of young stars in the Orion Complex. We confirm recent findings that stars with rotation periods faster than 2 days are overwhelmingly binaries, with typical separations of
Marina Kounkel, Keivan G. Stassun, Lynne A. Hillenbrand, Jesús Hernández, Javier Serna, Jason Lee Curtis   +5 more
doaj   +1 more source

The GRAVITY young stellar object survey

Astronomy & Astrophysics
V. Ganci, Lucas Labadie, K. Perraut, A. Wojtczak, J. Kaufhold, M. Benisty, E. Alécian, G. Bourdarot, W. Brandner, A. Caratti o Garatti, C. Dougados, R. García López, J. Sánchez-Bermúdez, A. Soulain, A. Amorim, Jean-Philippe Berger, P. Caselli, Y. Clénet, A. Drescher, A. Eckart, F. Eisenhauer, M. Fabricius, H. Feuchtgruber, P. García, É. Gendron, R. Genzel, S. Gillessen, Sierra L. Grant, G. Heißel, Thomas Henning, M. Horrobin, L. Jocou, P. Kervella, S. Lacour, V. Lapeyrère, J.-B. Le Bouquin, Pierre Léna, D. Lutz, F. Mang, Nuno Morujão, T. Ott, T. Paumard, G. Perrin, D. Ribeiro, M. S. Bordoni, S. Scheithauer, J. Shangguan, Thomas Shimizu, C. Straubmeier, E. Sturm, L. J. Tacconi, E. F. van Dishoeck, F. Vincent, J. Woillez   +53 more
  +6 more sources

THE SPITZER SPACE TELESCOPE SURVEY OF THE ORION A AND B MOLECULAR CLOUDS. II. THE SPATIAL DISTRIBUTION AND DEMOGRAPHICS OF DUSTY YOUNG STELLAR OBJECTS [PDF]

, 2015
We analyze the spatial distribution of dusty young stellar objects (YSOs) identified in the Spitzer Survey of the Orion Molecular clouds, augmenting these data with Chandra X-ray observations to correct for incompleteness in dense clustered regions.
S. T. Megeath, S. T. Megeath, R. Gutermuth, J. Muzerolle, E. Kryukova, J. Hora, L. Allen, K. Flaherty, L. Hartmann, P. Myers, J. Pipher, J. Stauffer, E. Young, G. Fazio   +13 more
semanticscholar   +1 more source