Results 101 to 110 of about 229,704 (266)
Distribution of Dust in the Orion Nebula [PDF]
Symposium - International Astronomical Union, 1974 The distribution of the dust is found by comparing 3-cm brightness temperatures, Hα surface brightness, and Hβ surface brightness. The dust is probably mixed with the gas. The Balmer radiation originates in front of the dark bay.
openaire +2 more sources
Candidates for Substellar Members of the Orion Nebula Cluster from JWST/NIRCam
The Astronomical JournalIn 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
NEAR-INFRARED VARIABILITY IN THE ORION NEBULA CLUSTER [PDF]
, 2015 Using UKIRT on Mauna Kea, we have carried out a new near-infrared J, H, K monitoring survey of almost a square degree of the star-forming Orion Nebula Cluster with observations on 120 nights over three observing seasons, spanning a total of 894 days.
T. Rice +4 more
semanticscholar +1 more source
A nebular analysis of the central Orion Nebula with MUSE [PDF]
, 2015 A nebular analysis of the central Orion Nebula and its main structures is presented. We exploit MUSE integral field observations in the wavelength range 4595-9366 \r{A} to produce the first O, S and N ionic and total abundance maps of a region spanning 6'
A. Leod +6 more
semanticscholar +1 more source
The Astrophysical JournalDespite 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 +7 more
doaj +1 more source
Gas absorption and dust extinction towards the Orion Nebula Cluster [PDF]
, 2016 We characterise the relation between the gas and dust content of the interstellar medium towards young stellar objects in the Orion Nebula Cluster. X-ray observations provide estimates of the absorbing equivalent hydrogen column density N_H based on ...
B. Hasenberger +6 more
semanticscholar +1 more source
Discovery of Radio Recombination Lines from Proplyds in the Orion Nebula Cluster
The Astrophysical JournalWe 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 +7 more
doaj +1 more source
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 +9 more
semanticscholar +1 more source
Tests of Disk-locking in T Tauri Stars of the Orion Nebula Cluster
The Astrophysical JournalWe 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 +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 +5 more
semanticscholar +1 more source