搜索结果: 1-15 共查到“天文学 neutral”相关记录23条 . 查询时间(0.062 秒)
We present high-resolution H41α hydrogen recombination line observations of the 12 (3 pc) region surrounding Sagittarius A* (Sgr A*) at 92 GHz using the Millimeter Array at the Owens Valley Radio Obse...
We have observed a 3° × 3° area centered on the M81/M82 group of galaxies using the Robert C. Byrd Green Bank Telescope in a search for analogs to the high-velocity clouds of neutral hydrogen found ar...
DETECTION OF DIFFUSE NEUTRAL INTRAGROUP MEDIUM IN HICKSON COMPACT GROUPS
new Green Bank Telescope gas mass fraction
2014/12/20
We present new Green Bank Telescope (GBT) 21 cm neutral hydrogen (H I) observations of a complete distance-limited sample of 22 Hickson Compact Groups (HCGs) with at least four true members. We detect...
Multiwavelength Study Of The Distribution Of Neutral Gas In And Around Galaxies And Groups Of Galaxies
Pure sciences Absorption Compact groups Galaxy evolution Hydrogen Lyman alpha
2014/12/9
We study the distribution and nature of neutral hydrogen in various environments. We start by exploring the disk and halos of galaxies in Chapter 1. Our sample consists of 23 sightlines through 15 low...
The interstellar medium is not necessary fully ionized. When a shock propagates into the partially ionized medium, some neutral particles leak into the upstream region from the downstream region. In t...
Neutral and charged matter in equilibrium with black holes
Neutral charged matter equilibrium black holes
2011/10/14
We study the conditions of a possible static equilibrium between spherically symmetric, electrically charged or neutral black holes and ambient matter. The following kinds of matter are considered: (1...
Modelling neutral hydrogen in galaxies using cosmological hydrodynamical simulations
galaxies: evolution: general ?galaxies: luminosity function, mass func-tion ?dark matter ?radio lines: galaxies ?methods: N-body simulations
2011/10/11
The characterisation of the atomic and molecular hydrogen content of high-redshift galaxies is a major observational challenge that will be addressed over the coming years with a new generation of rad...
Studies of Diffuse Interstellar Bands. V. Pairwise Correlations of Eight Strong DIBs and Neutral Hydrogen, Molecular Hydrogen, and Color Excess
ISM lines and bands − ISM molecules
2010/11/15
We establish correlations between equivalent widths of eight diffuse interstel-lar bands (DIBs), and examine their correlations with atomic hydrogen, molec-ular hydrogen, and EB−V . The DIBs are...
The thermally-unstable warm neutral medium: key for modeling the interstellar medium
Galaxy Astrophysics (astro-ph.GA)
2011/1/6
We present 21-cm absorption measurements towards 12 radio continuum sources with previously identified thermally-unstable warm neutral medium (WNM). These observations were obtained with the Expanded ...
Statistical universal branching ratios for cosmic ray dissociation, photodissociation, and dissociative recombination of the C(n=2-10), C(n=2-4)H and C3H2 neutral and cationic species
Galaxy Astrophysics (astro-ph.GA)
2010/12/23
Fragmentation branching ratios of electronically excited molecular species are of first importance for the modeling of gas phase interstellar chemistry. Despite experimental and theoretical efforts th...
The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region
interstellar centaurus region wr 53
2009/7/9
The neutral counterpart of an uncatalogued nebula and a probable interstellar bubble around wr 53 in the centaurus region。
Shadows and photoevaporated flows from neutral clumps exposed to two ionizing sources
Shadows ionizing sources photoevaporate
2009/6/30
Shadows and photoevaporated flows from neutral clumps exposed to two ionizing sources。
Herbig-Haro Jets Emerging from a Neutral Cloud into a H II region
Herbig-Haro Jets Neutral Cloud H II region
2009/6/18
Herbig-Haro Jets Emerging from a Neutral Cloud into a H II region。
Expanding Shells of Neutral Hydrogen around Compact H II Regions
Neutral Hydrogen Compact H II Regions
2009/6/15
Expanding Shells of Neutral Hydrogen around Compact H II Regions。
Observations of Small-Scale Structure in AGB Star Winds：Precursors of Neutral Globules in PNE?
Small-Scale Structure Neutral Globules AGB Star Winds
2009/6/15
Observations of Small-Scale Structure in AGB Star Winds：Precursors of Neutral Globules in PNE?