Results 81 to 90 of about 12,515 (261)

Using Rapid Rotators as Tracers of Multiplicity Statistics as a Function of Stellar Density

The Astrophysical Journal
Recent works have identified that rapidly rotating stars are predominantly binaries with separations of a few to a few tenths of an astronomical unit. This is a crucial range of separation that is often inaccessible to searches of binary stars, providing
Priyanka Cingirikonda, Marina Kounkel, Joseph Mullen   +2 more
doaj   +1 more source

The distance to the Orion Nebula cluster [PDF]

Monthly Notices of the Royal Astronomical Society, 2007
Abstract The distance to the Orion Nebula cluster (ONC) is estimated using the rotational properties of its low-mass pre-main-sequence (PMS) stars. Rotation periods, projected equatorial velocities and distance-dependent radius estimates are used to form an observational sin i distribution (where i is the axial inclination), which is ...
openaire   +2 more sources

Candidates for Substellar Members of the Orion Nebula Cluster from JWST/NIRCam

The Astronomical Journal
In 2022, the James Webb Space Telescope (JWST) obtained 1–5 μ m images of the center of the Orion Nebula Cluster (ONC). I have analyzed these data in an attempt to search for substellar members of the cluster. Using a pair of color–color diagrams, I have
K. L. Luhman
doaj   +1 more source

The Robust Detection and Spatial Distribution of Acetaldehyde in Orion KL: Atacama Large Millimeter/submillimeter Array Observations and Chemical Modeling

The Astrophysical Journal
Despite the organic molecule inventory detected in the Orion Kleinmann–Low Nebula (Orion KL), acetaldehyde (CH _3 CHO)—one of the most ubiquitous interstellar aldehydes—has not been firmly identified with millimeter-wave interferometry.
Miwha Jin, Anthony J. Remijan, Robin T. Garrod, Giseon Baek, Martin Cordiner, Steven Charnley, Eric Herbst, Jeong-Eun Lee   +7 more
doaj   +1 more source

SIRIUS Project – V. Formation of off-centre ionized bubbles associated with Orion Nebula Cluster [PDF]

, 2022
Michiko S. Fujii, Kohei Hattori, Long Wang, Yutaka Hirai, Jun Kumamoto, Yoshito Shimajiri, Takayuki R. Saitoh   +6 more
openalex   +1 more source

Imaging the Ionized Disk of the High-Mass Protostar Orion-I

, 2007
We have imaged the enigmatic radio source-I (Orion-I) in the Orion-KL nebula with the VLA at 43 GHz with 34 mas angular resolution. The continuum emission is highly elongated and is consistent with that expected from a nearly edge-on disk.
Alcolea J., Baars J. W. M., Bujarrabal V., C. J. Chandler, K. M. Menten, L. J. Greenhill, M. J. Reid   +6 more
core   +1 more source

Discovery of Radio Recombination Lines from Proplyds in the Orion Nebula Cluster

The Astrophysical Journal
We present new Atacama Large Millimeter/submillimeter Array observations that, for the first time, detect hydrogen and helium radio recombination lines from a protoplanetary disk.
Ryan D. Boyden, Kimberly L. Emig, Nicholas P. Ballering, Charles J. Law, Thomas J. Haworth, Jonathan C. Tan, L. Ilsedore Cleeves, Zhi-Yun Li   +7 more
doaj   +1 more source

Small Protoplanetary Disks in the Orion Nebula Cluster and OMC1 with ALMA [PDF]

, 2021
Justin A. Otter, Adam Ginsburg, Nicholas P. Ballering, John Bally, J. A. Eisner, C. Goddi, R. L. Plambeck, M. C. H. Wright   +7 more
openalex   +1 more source

Tests of Disk-locking in T Tauri Stars of the Orion Nebula Cluster

The Astrophysical Journal
We look for specific correlations predicted by magnetospheric accretion models for young stars that assume disk-locking using stellar and accretion parameters derived from low-resolution HST-STIS spectra of 33 T Tauri stars in the Orion Nebula Cluster ...
Margaret A. Mueller, Christopher M. Johns-Krull, Keivan G. Stassun, Don M. Dixon   +3 more
doaj   +1 more source

The First Circumstellar Disk Imaged in Silhouette with Adaptive Optics: MagAO Imaging of Orion 218-354

, 2013
We present high resolution adaptive optics (AO) corrected images of the silhouette disk Orion 218-354 taken with Magellan AO (MagAO) and its visible light camera, VisAO, in simultaneous differential imaging (SDI) mode at H-alpha.
Briguglio, Runa, Close, Laird M., Esposito, Simone, Follette, Katherine B., Hinz, Philip, Kopon, Derek, Males, Jared R., Morzinski, Katie M., Pinna, Enrico, Puglisi, Alfio, Riccardi, Armando, Rodigas, Timothy J., Wu, Ya-Lin, Xompero, Marco   +13 more
core   +1 more source