Results 101 to 110 of about 239,171 (281)

Fine Scale Temperature Fluctuations in the the Orion Nebula and the t^2 Problem [PDF]

open access: yes, 2003
We present a high spatial resolution map of the columnar electron temperature (Tc) of a region to the south west of the Trapezium in the Orion Nebula.
Antonio Peimbert   +16 more
core   +3 more sources

The Great Nebula in Orion

open access: yesScientific American, 1890
n ...
openaire   +2 more sources

Winchcombe: An example of rapid terrestrial alteration of a CM chondrite

open access: yesMeteoritics &Planetary Science, Volume 59, Issue 5, Page 988-1005, May 2024.
Abstract Winchcombe is a CM chondrite that fell in England on February 28, 2021. Its rapid retrieval was well characterized. Within two polished sections of Winchcombe, terrestrial phases were observed. Calcite and calcium sulfates were found in a sample recovered from a field on March 6, 2021, and halite was observed on a sample months after its ...
Laura E. Jenkins   +7 more
wiley   +1 more source

Properties of the HII Regions Derived Using Integral Field Spectroscopy

open access: yesAdvances in Astronomy, 2013
Here we review some of our more recent results on the observed properties of HII regions using Integral Field Spectroscopy. In particular, we illustrate the use of this technique to study in detail the ionization conditions across the nebulae for ...
Sebastian F. Sánchez
doaj   +1 more source

The bimodal initial mass function in the Orion Nebula Cloud [PDF]

open access: yes, 2016
Due to its youth, proximity and richness the Orion Nebula Cloud (ONC) is an ideal testbed to obtain a comprehensive view on the Initial Mass Function (IMF) down to the planetary mass regime.
H. Drass   +7 more
semanticscholar   +1 more source

Pre‐Orion Cores in the Trifid Nebula [PDF]

open access: yesThe Astrophysical Journal, 2000
The Trifid nebula is a young HII region undergoing a burst of star formation. In this article, we report on far-infrared and millimeter continuum and line observations of several massive and bright protostellar sources in the vicinity of the exciting star fo the nebula, just behind the ionization front.
Bertrand Lefloch   +2 more
openaire   +4 more sources

Multistage Gold‐Polymetallic Mineralization in the Bou Azzer District, Anti‐Atlas, Morocco: Insights from Ore Microscopic, Geochemical, and Fluid Inclusion Studies

open access: yesGeofluids, Volume 2024, Issue 1, 2024.
The Bou Azzer polymetallic Co‐Ni‐As±Au±Ag veins in the Central Anti‐Atlas (Morocco) are significant sulfide ores hosted by Neoproterozoic ophiolites and are associated with felsic intrusive and subvolcanic phases. We report new mineralogical and fluid inclusion data to better understand mineralization’s formation processes and fluid evolution which are
Amina Wafik   +11 more
wiley   +1 more source

A Parallactic Distance of 389 +24/-21 parsecs to the Orion Nebula Cluster from Very Long Baseline Array Observations

open access: yes, 2007
We determine the parallax and proper motion of the flaring, non-thermal radio star GMR A, a member of the Orion Nebula Cluster, using Very Long Baseline Array observations. Based on the parallax, we measure a distance of 389 +24/-21 parsecs to the source.
Alberto D. Bolatto   +10 more
core   +1 more source

V1647 Orionis (IRAS 05436-0007) : A New Look at McNeil's Nebula [PDF]

open access: yes, 2004
We present a study of the newly discovered McNeil's nebula in Orion using the JHKs-band simultaneous observations with the near-infrared (NIR) camera SIRIUS on the IRSF 1.4m telescope.
Baba, D.   +12 more
core   +2 more sources

THE POPULATION OF COMPACT RADIO SOURCES IN THE ORION NEBULA CLUSTER [PDF]

open access: yes, 2016
We present a deep centimeter-wavelength catalog of the Orion Nebula Cluster (ONC), based on a 30 hr single-pointing observation with the Karl G. Jansky Very Large Array in its high-resolution A-configuration using two 1 GHz bands centered at 4.7 and 7.3 ...
J. Forbrich   +8 more
semanticscholar   +1 more source

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