搜索结果: 1-15 共查到“星系与宇宙学 observations,”相关记录58条 . 查询时间(0.113 秒)
Using the Very Large Array, we have made spectral-line and continuum observations of the neutral hydrogen in the direction of the compact group of galaxies Stephan's Quintet. The high-velocity clouds ...
Chandra Observations of the Bursting X-Ray Transient SAX J1747.0–2853 during Low-Level Accretion Activity
SAX J1747.0–2853 stars
2014/12/26
We present Chandra/ACIS observations of the bursting X-ray transient SAX J1747.0-2853 performed on 2001 July 18. We detected a bright source at the position of R.A. = 17h47m02.s60 and decl. = -28°52'5...
Title: Chandra Observations of the Galactic Center and Nearby Edge-on Galaxies
Galactic Center Nearby Edge-on Galaxies
2014/12/26
I review our recent Chandra surveys of the center region of the Milky Way and other nearby edge-on galaxies. Our Galactic center survey provides an unprecedented high-resolution, broad-band X-ray pano...
Comparing simulations and observations of the Ly alpha forest. I. Methodology
data analysis N-body simulations
2014/12/26
We describe techniques for comparing spectra extracted from cosmological simulations and observational data, using the same methodology to link Lyα properties derived from the simulations with propert...
The Apparent Host Galaxy of PKS 1413+135: Hubble Space Telescope,* ASCA, and Very Long Baseline Array ** Observations
HST ASCA
2014/12/26
PKS 1413+135 (z = 0.24671) is one of very few radio-loud active galactic nuclei (AGNs) with an apparent spiral host galaxy. Previous authors have attributed its nearly exponential infrared cutoff to h...
Multiwavelength Observations of the Gas-rich Host Galaxy of PDS 456: A New Challenge for the ULIRG-to-QSO Transition Scenario
PDS 456 IRAS 08572+3915
2014/12/24
We report new K-band, radio continuum, and CO (1-0) imaging observations and 850 μm photometric observations of PDS 456, the most luminous QSO in the local universe (z < 0.3). The 06 resolution K-band...
Confronting the Superbubble Model with X-Ray Observations of 30 Doradus C
bubbles HII regions
2014/12/24
We present an analysis of XMM-Newton observations of the superbubble 30 Dor C and compare the results with the predictions from the standard wind-blown bubble model. We find that the observed X-ray sp...
Radial Gas Flows in Colliding Galaxies: Connecting Simulations and Observations
interactions kinematics and dynamics
2014/12/24
We investigate the detailed response of gas to the formation of transient and long-lived dynamical structures induced in the early stages of a disk-disk collision and identify observational signatures...
Black hole X-ray binaries LMC X–1 and X–3: observations confront spectral models
LMC X–1 LMC X–3
2014/12/24
We present a comprehensive spectral analysis of black hole X-ray binaries, LMC X–1 and X–3, based on BeppoSAX observations. We test both the multicolour disc plus power-law (MCD+PL) model and a newly ...
We present high spatial resolution (51 × 27) Owens Valley Radio Observatory (OVRO) millimeter array observations of HCN (J = 1-0) and HCO+ (J = 1-0) emission in the inner 3 pc of the Galaxy (0.04 pc ~...
The interplay between star formation and the nuclear environment of our Galaxy: deep X-ray observations of the Galactic centre Arches and Quintuplet clusters
n star formation the nuclear environment
2014/12/24
The Galactic centre (GC) provides a unique laboratory for a detailed examination of the interplay between massive star formation and the nuclear environment of our Galaxy. Here, we present a 100-ks Ch...
Chandra Observations of the Galactic Center: High Energy Processes at Arcsecond Resolution
High Energy Processes Arcsecond Resolution
2014/12/24
About 2 million seconds of Chandra observing time have been devoted to the Galactic Center (GC), including large-scale surveys and deep pointings. These observations have led to the detection of about...
We report the detection of interstellar hydrogen deuteride (HD) toward the
supernova remnant IC443, and the tentative detection of HD toward the Herbig
Haro objects HH54 and HH7 and the star forming...
Submillimeter Wave Astronomy Satellite observations of Comet 9P/Tempel 1 and Deep Impact
Comet Tempel-1 Radiative Transfer Radio Observations Comets
2014/12/23
On 4 July 2005 at 5:52 UT the Deep Impact mission successfully completed its goal to hit the nucleus of 9P/Tempel 1 with an impactor, forming a crater on the nucleus and ejecting material into the com...
VLA and XMM-Newton Observations of the SNR W41/TeV Gamma-Ray Source HESS J1834–087
W41 HESS
2014/12/23
The recently discovered extended TeV source HESS J1834-087 is associated with both a diffuse X-ray enhancement and a molecular cloud, projected at the center of an old radio supernova remnant, G23.3-0...