Results 131 to 140 of about 239,171 (281)

ALMA OBSERVATIONS OF THE LARGEST PROTO-PLANETARY DISK IN THE ORION NEBULA, 114–426: A CO SILHOUETTE [PDF]

, 2015
We present ALMA observations of the largest protoplanetary disk in the Orion Nebula, 114–426. Detectable 345 GHz (856 μm) dust continuum is produced only in the 350 AU central region of the ∼1000 AU diameter silhouette seen against the bright H &agr ...
J. Bally, R. Mann, J. Eisner, S. Andrews, J. Francesco, M. Hughes, D. Johnstone, B. Matthews, L. Ricci, Jonathan P. Williams   +9 more
semanticscholar   +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

On the O/H, Mg/H, Si/H and Fe/H Gas and Dust Abundance Ratios in Galactic and Extragalactic H II Regions

, 2010
We derive the Mg/H ratio in the Orion nebula and in 30 Doradus. We also derive the O/H and the Fe/O ratios in the extremely metal poor galaxy SBS 0335-052.
Antonio Peimbert, Bastin, Cannon, Carigi, Carigi, Carigi, Esteban, Esteban, Esteban, Fadeyev, García-Rojas, García-Rojas, Garnett, Izotov, Izotov, Izotov, Izotov, Jenkins, Luridiana, López-Sánchez, Manuel Peimbert, Ossenkopf, Pagel, Pagel, Peimbert, Peimbert, Peimbert, Peimbert, Peimbert, Peimbert, Peimbert, Peimbert, Przybilla, Rodríguez, Ruiz, Storey, Storey, Thuan   +37 more
core   +1 more source

Spitzer reveals what's behind Orion's Bar [PDF]

, 2010
We present Spitzer Space Telescope observations of 11 regions SE of the Bright Bar in the Orion Nebula, along a radial from the exciting star theta1OriC, extending from 2.6 to 12.1'.
Abel, Abel, Asplund, Bahcall, Baldwin, Baldwin, Blagrave, C. R. O’Dell, Cami, Clayton, Drake, Esteban, Froese Fischer, Gary J. Ferland, Griffin, Henney, Henney, Henney, Higdon, Houck, Ian A. McNabb, Irimia, Janet P. Simpson, Jones, Kaufman, Lodders, Magrini, McLaughlin, Morel, Osterbrock, O’Dell, O’Dell, O’Dell, O’Dell, O’Dell, Peimbert, Podobedova, Porter, Pottasch, Ramsbottom, Robert H. Rubin, Rodríguez, Rodríguez, Rubin, Rubin, Rubin, Rubin, Rubin, Rubin, Rubin, Rubin, Rubin, Saraph, Scott Y. Zhuge, Sean W. J. Colgan, Sergio A. Hidalgo, Simpson, Simpson, Simpson, Smith, Storey, Tauber, Tayal, Tenorio-Tagle, Tielens, van der Werf, Wang, Wen, Witthoeft, Woosley   +69 more
core   +3 more sources

SHORT- AND LONG-TERM RADIO VARIABILITY OF YOUNG STARS IN THE ORION NEBULA CLUSTER AND MOLECULAR CLOUD [PDF]

, 2015
We have used the Karl G. Jansky Very Large Array (VLA) to carry out multi-epoch radio continuum monitoring of the Orion Nebula Cluster (ONC) and the background Orion Molecular Cloud (OMC; 3 epochs at Q band and 11 epochs at Ka band). Our new observations
V. Rivilla, C. Chandler, J. Sanz-Forcada, I. Jímenez-Serra, I. Jímenez-Serra, J. Forbrich, J. Martín-Pintado   +6 more
semanticscholar   +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

BOOTSTRAPPING DIELECTRONIC RECOMBINATION FROM SECOND-ROW ELEMENTS AND THE ORION NEBULA [PDF]

, 2015
Dielectronic recombination (DR) is the dominant recombination process for most heavy elements in photoionized clouds. Accurate DR rates for a species can be predicted when the positions of autoionizing states are known.
N. Badnell, G. Ferland, G. Ferland, T. Gorczyca, D. Nikolić, G. Wagle   +5 more
semanticscholar   +1 more source

Chemistry in Externally FUV-irradiated Disks in the Outskirts of the Orion Nebula Cluster

The Astrophysical Journal
Most stars are born in stellar clusters, and their protoplanetary disks, which are the birthplaces of planets, can, therefore, be affected by the radiation of nearby massive stars.
Javiera K. Díaz-Berríos, Viviana V. Guzmán, Catherine Walsh, Karin I. Öberg, L. Ilsedore Cleeves, Elizabeth Artur de la Villarmois, John Carpenter   +6 more
doaj   +1 more source

Relationship between CH₃OD Abundance and Temperature in the Orion KL Nebula. [PDF]

J Phys Chem A, 2022
Wilkins OH, Blake GA.
europepmc   +1 more source

Internal Motions in the Orion Nebula [PDF]

Reviews of Modern Physics, 1958
In the first and second Symposia of this series von Weizsäcker and von Hoerner discussed the problem of turbulence in the Orion Nebula, while in the second Symposium Courtès has further treated the problem. Von Hoerner has presented a detailed discussion of the methodologies of the treatment.
openaire   +2 more sources