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N H and HC N Observations of the Orion A Cloud

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ASTRONOMY AND ISO-SWS observations of OMC-1: H and fine structure lin

The Orion molecular cloud, OMC-1, located behind the Orion M42Nebulaatadistanceof˘450pc(Genzel&Stutzki1989),is thebest-studiedmassivestarformingregion.Thiscloudembeds ...

CO velocity features in the Orion molecular cloud associated with shock fronts and expansion of the Orion H II region (Journal Article) | OSTI.G

CO velocity features in the Orion molecular cloud associated with shock fronts and expansion of the Orion H II region Full Record Other Related Research Abstract Kinematic features of CO and /sup 13/CO are identified with an expanding shock advancing into ...

Hydroxyl radical - Wikipedia, the free encycloped

n H 2n+1 –OH). Hydroxyl radical Hydroxyl radical - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Hydroxyl_radical ... OH observations of molecular complexes in Orion and Taurus. Baud and Wouterloot. Map of OH emission in densities are in ...

8.1. STAR-FORMING MOLECULAR CLOUDS - NASA/IPAC Extragalactic Database - N

Here, I provide an overview of the observations and physics of star-forming molecular clouds in the Galaxy and nearby normal galaxies. ... For this size cloud, the mean density is n H 2 ~ 180 cm-3 - larger clouds have lower density and smaller clouds higher ...

The Galactic Environment of the Sun: Interstellar Material Inside and Outside of the Heliosphe

concluded that the velocity of the interstellar cloud feeding H into the heliosphere has not changed substantially over the intervening two decades, and that the circumheliospheric in ...

Orion Nebula - Wikiped

The Orion Nebula is one of the most scrutinized and photographed objects in the night sky, and is among the most intensely studied celestial features. The nebula has revealed much about the process of how stars and planetary systems are formed from collapsing ...

Doctor Nicholas Tothi

Chapters in Books Tothill, N. and Martin, C. (2013), 'Winterover scientists in Antarctic astrophysics', Astrophysics from Antarctica: Proceedings of the 288th Symposium of the International Astronomical Union held in Beijing, China, August 20-24, 2012, Cambridge ...

Hydroxyl radical - Wikiped

The hydroxyl radical, • OH, is the neutral form of the hydroxide ion (OH −). Hydroxyl radicals are highly reactive (easily becoming ... Baan, Haschick, and Henkel. Observations of • H and • OH molecular emission through • OH megamasers galaxies, in order to ...

Beckwith Publications 2015 - UC Berkeley Astronomy Departme

“Observations of the Extinction and Excitation of the Molecular Hydrogen Emission in Orion,” S. Beckwith, N. J. Evans II, I. Gatley, G. Gull, and R. W. Russell, Ap. J., ...

ChemicalVariationinMolecularCloudCoresin the OrionACloud. I

The criterion found in the Orion A GMC is N(N2H+)/N(CCS) ∼2−3. In some cases, the CCS emission is detected toward protostars as well as the N2H+ emission. ...

Lecture 25 Physical Properties of Molecular Clouds 1. Giant Molecular Clou

The Orion Molecular Cloud Complex Cloud B Cloud A Early mini-telescope CO map These clouds can Õt be much older than 10-20 Myr, the age ...

www.groundai.c

Abstract. Infrared stellar photometry from the Two Micron All Sky Survey (2MASS) and spectral line imaging observations of 12 CO and 13 CO J = 1-0 line emission from the Five Coll

Publications - Green Bank Observato

On average, a GBT paper* is published every 4.4 days. Review our list of recent and past publications below. 2019 Publications Bilous, A.V., Ransom, S.M. and Demorest, P., 2019. Unusually Bright Single Pulses from the Binary Pulsar B1744–24A: A Case of ...

Detection of OH+ and H2O+ towards Orion

arXiv:1009.1450v1 [astro-ph.GA] 8 Sep 2010 Astronomy & Astrophysicsmanuscript no. 15117arxiv c ESO 2010 September 9, 2010 Detection of OH+and H 2O +towards Orion KL H. Gupta,1 P. Rimmer,2 J. C. Pearson,1 S. Yu,1 E. Herbst,2 N. Harada,2 E. A ...

The 15 N-enrichment in dark clouds and Solar System objec

The line intensities of the fundamental rotational transitions of H 13 CN and HC 15 N were observed towards two prestellar cores, ... The CN nitrogen isotopic composition was measured in a large number of Oort Cloud comets (14 N/ 15 N ave = 144 ± 6.5) and14 ...

Observing the Sky from 40°N/Introduction - Wikibooks, open books for an open wor

Observations of globular clusters show that these stellar formations arise primarily in regions of efficient star formation, ... An H II region is a large cloud of gas and ionized gas of glowing low density in which star formation has recently taken place. The precursor ...

HIFI SPECTRAL MAPPING OF C , AND CH IN ORION

... [N(CH +)/ N (H)] = −8.11 ± 0.33, in the interstellar medium ISM)(from a compilation of references by Godard & Cernicharo 2013) has ... observations. The nearby Orion Molecular Cloud 1 (OMC1) surrounding the BN/KL massive SFR offers a varied and the CH ...

NGVLA Observations of Initial Conditions in High-Mass Star- Forming Clou

Stars form out of dense molecular gas 2 Lada, Lombardi & Alves (2010); see also Lada et al. (2012) • Lada, Lombardi & Alves (2010) find a linear scaling between N (YSO) and the (H 2) mass of a cloud over a surface density threshold of ~116 M pc-2

Observations of the J=1$Yields$0 transitions of the $sup 13$C isotopic species of Cyanoacetylene (HCCCN) in the direction of Sagittarius B2 .

OSTI.GOV Journal Article: Observations of the J=1$Yields$0 transitions of the $sup 13$C isotopic species of Cyanoacetylene (HCCCN) in the direction of Sagittarius B2

N2H + and HC3N Observations of the Orion A Cloud - CO

(Received; accepted) The “ ∫-shaped filament ” of the Orion A giant molecular cloud was mapped in N2H + J = 1→0, ... The N2H + distribution is similar to the dust continuum distribution, except for the central part of the Orion Nebula. The distribution of H 13 but ...

Proceedings | For Astronomers | National Astronomical Observatory of Japan NOBEYA

Hasegawa, T.: CO in the Orion Molecular Cloud, Proc. Workshop on "Small Scale Clumping in Molecular Clouds", MPIfR, Bonn, West Germany, 1984. ...