搜索结果: 121-135 共查到“天文学 Observations”相关记录297条 . 查询时间(0.156 秒)
Deep 21-cm HI Observations at z~0.1: The Precursor to the Arecibo Ultra Deep Survey
cosmology observations galaxies evolution radio lines galaxies
2010/11/10
The \ALFA Ultra Deep Survey" (AUDS) is an ongoing 21-cm spectral survey with the Arecibo 305m telescope. AUDS will be the most sensitive blind survey undertaken with Arecibo's 300 MHz Mock spectromete...
The SIMPLE survey: observations, reduction, and catalog
catalogs – galaxies evolution – galaxies observations – galaxies photometry –infrared galaxies
2010/11/15
We present the Spitzer IRAC/MUSYC Public Legacy Survey in the Extended CDF-South (SIM-
PLE), which consists of deep IRAC observations covering the 1,600 arcmin2 area surrounding
GOODS-S. The limiti...
The Wide-Field X-ray Telescope (WFXT) is a proposed NASA mission dedicated to performing surveys of the sky in the soft X-ray band (0.3 − 6 keV).The key characteristics of this missions are a co...
Constraints on the Cosmic-Ray Density Gradient beyond the Solar Circle from Fermi gamma-ray Observations of the Third Galactic Quadrant
cosmic rays – gamma rays ISM – ISM general
2010/11/10
We report an analysis of the interstellar-ray emission in the third Galactic quadrant measured
by the Fermi Large Area Telescope. The window encompassing the Galactic plane from longitude 210◦ ...
Deep CO Observations and the CO-to-H_2 Conversion Factor in DDO 154, a Low Metallicity Dwarf Irregular Galaxy
galaxies ISM — ISM molecules — stars formation
2010/11/16
We present a deep spectroscopic search for CO emission in the dwarf irregular galaxy DDO154, which has an Oxygen abundance of only 1/20 the solar value. The observations were conducted in order to con...
Contribution of amateur observations to Saturn storm studies
Contribution of amateur observations Saturn storm studies
2010/11/11
Since 2004, Saturn Electrostatic Discharges (SEDs),which are the radio signatures of lightning in Saturn’s atmosphere, have been observed by the Cassini Radio and Plasma Wave Science instrument (RPWS)...
Six years of XMM-Newton observations of NGC 1313 X-1 and X-2
accretion accretion disks – X-rays binaries – X-Rays galaxies – X-rays individuals (NGC 1313 X-2)
2010/11/12
We present a systematic analysis of the X-ray spectra of NGC 1313 X-1 and NGC 1313 X-2, using six years of XMMNewton observations (17 observations).We fitted the continuum with a Comptonization model ...
Two Epochs of Very Large Array Observations of Water Maser Emission in the active galaxy NGC 6240
galaxies active - galaxies individual (NGC 6240) - galaxies ISM - ISM - galaxies nuclei masers
2010/11/12
Studies of 22GHz H2O maser emission from the merging galaxy NGC 6240 with double nuclei are presented. Two epochs of Very Large Array (VLA) obser-vations in the A-configuration in spectral-line mode w...
Spitzer observations of supernova remnants: II. Physical conditions and comparison with HH7 and HH54
molecular — ISM abundance — ISM clouds molecular processes shock waves
2010/11/9
We have studied the shock-excited molecular regions associated with four supernova remnants (SNRs) — IC443C, W28, W44 and 3C391 — and two Herbig-Haro objects,HH7 and HH54, using Spitzer ’s Infrared Sp...
INTEGRAL observations of the GeV blazar PKS1502+106 and of the hard X-ray bright Seyfert Galaxy Mkn841
galaxies active – quasars individual PKS 1502+106 – Galaxies Seyfert – galaxies individual Mkn 841 – radiation
2010/11/16
Context. Extragalactic nuclear activity is best explored with observations at high energies, where the most extreme flux and spectral variations are expected to occur, witnessing changes in the accret...
Standing Slow-Mode Waves in Hot Coronal Loops: Observations, Modeling, and Coronal Seismology
Solar activity Solar corona Coronal Seismology Coronal loops
2010/11/15
Strongly damped Doppler shift oscillations are observed frequently associated with flarelike events in hot coronal loops. In this paper, a review of the observed properties and the theoretical modelin...
Radio Halos and the importance of future observations at low frequency
Radio Halos future observations low frequency
2010/11/11
Radio observations discovered large scale non thermal sources in the central Mpc regions of
dynamically disturbed galaxy clusters (radio halos). The morphological and spectral properties of these sou...
Precise Gamma-Ray Timing and Radio Observations of 17 Fermi Gamma-Ray Pulsars
Gamma rays stars pulsars general Radio continuum stars X-rays: stars
2010/11/15
We present precise phase-connected pulse timing solutions for 16 gamma-ray-selected pulsars
recently discovered using the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope plus one ve...
New observations of ULX supershells, and their implications
ISM bubbles – HII regions – ISM jets and outflows – X-rays binaries – shock waves
2010/11/10
New optical narrowband imaging observations of the fields of several ULXs are presented. Known supershell nebulae are associated with a number of these ULXs, which we detect in emission lines filters ...
Wide-field VLBA Observations of the Chandra Deep Field South
Techniques interferometric Galaxies: active Galaxies evolution
2010/11/15
Context. Wide-field surveys are a commonly-used method for studying thousands of objects simultaneously, to investigate, e.g., the joint evolution of star-forming galaxies and active galactic nuclei. ...