Results 71 to 80 of about 12,515 (261)

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

Kinematics of Herbig-Haro Objects and Jets in the Orion Nebula [PDF]

, 2001
We have surveyed the inner 5' of the Orion Nebula by means of Halpha and [NII] Fabry-Perot imaging spectroscopy to present a kinematical study of the Herbig-Haro objects in the nebula.
Arias, Lorena, Coarer, Ettiane Le, de la Fuente, Eduardo, Raga, Alejandro, Rosado, Margarita   +4 more
core   +2 more sources

Limitations of the modified blackbody fit method for determining molecular cloud properties

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During the earliest stages, that is, concerning physical processes in molecular clouds and filaments, the column ...
Niko Zielinski, Sebastian Wolf
wiley   +1 more source

Properties of the HII Regions Derived Using Integral Field Spectroscopy

Advances 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

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

Meteoritics &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, Martin R. Lee, Luke Daly, Ashley J. King, Cameron J. Floyd, Pierre‐Etienne Martin, Natasha V. Almeida, Matthew J. Genge   +7 more
wiley   +1 more source

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

Geofluids, 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, Basem Zoheir, Fouad Benchekroun, Rachid Benaouda, Mohamed Ben Massoude, Youssef Atif, Amin Beiranvand Pour, Shojaeddin Niroomand, Amal El Arbaoui, Abdelhak Karfal, Lhou Maacha, Chris Harris   +11 more
wiley   +1 more source

Constraining Free–Free Emission and Photoevaporative Mass-loss Rates for Known Proplyds and New VLA–identified Candidate Proplyds in NGC 1977

The Astrophysical Journal
We present NSF's Karl G. Jansky Very Large Array observations covering the NGC 1977 region at 3.0, 6.4, and 15.0 GHz. We search for compact radio sources and detect continuum emission from 34 NGC 1977 cluster members and 37 background objects.
Ryan D. Boyden, Josh A. Eisner
doaj   +1 more source

HST Survey of the Orion Nebula Cluster in ACS/Visible and WFC3/IR Bands. IV. A Bayesian Multiwavelength Study of Stellar Parameters in the Orion Nebula Cluster

The Astrophysical Journal
We have performed a comprehensive study of the Orion Nebula Cluster (ONC) combining the photometric data obtained by the two Hubble Space Telescope Treasury programs that targeted this region.
Giovanni M. Strampelli, Massimo Robberto, Laurent Pueyo, Mario Gennaro, Carlo F. Manara, Elena Sabbi, Antonio Aparicio   +6 more
doaj   +1 more source

Properties of the ionized gas in HH202. I: Results from integral field spectroscopy with PMAS

, 2008
We present results from integral field spectroscopy with the Potsdam multi-Aperture Spectrograph of the head of the Herbig-Haro object HH 202 with a spatial sampling of 1"x1".
A. Mesa-Delgado, Blagrave, C. Esteban, Cantó, Costero, Davey, Doi, Doi, Esteban, Esteban, García-Rojas, García-Rojas, Henney, J. García-Rojas, L. López-Martín, Liu, Liu, Liu, Meaburn, Mesa-Delgado, O'Dell, O'Dell, O'Dell, O'Dell, O'Dell, O'Dell, O'Dell, Oke, Peimbert, Peimbert, Peimbert, Peimbert, Roth, Rubin, Shaw, Stasińska, Storey, Storey, Sánchez, Tenorio-Tagle, Tsamis, Tsamis, Tsamis, Tsamis, Tsamis, V. Luridiana, Vasconcelos   +46 more
core   +1 more source

Nested shells reveal the rejuvenation of the Orion-Eridanus superbubble [PDF]

, 2015
The Orion-Eridanus superbubble is the prototypical superbubble due to its proximity and evolutionary state. Here, we provide a synthesis of recent observational data from WISE and Planck with archival data, allowing to draw a new and more complete ...
Bally, J., Brown, A. G. A., Ochsendorf, B. B., Tielens, A. G. G. M.   +3 more
core   +3 more sources