搜索结果: 1-15 共查到“恒星与银河系 emission”相关记录23条 . 查询时间(0.061 秒)
Circumstellar gas and dust emission and mass loss from evolved stars
Orbiting a star Gas Dust emissions Evolution of stars
2014/12/9
This dissertation presents a study of the circumstellar gas and dust emission and their relation to the mass-loss in evolved stars. Considering the physical process of heating and cooling of the dust,...
Emission line diagnostics of magnetospheric accretion in young stellar objects
Line emission Stars Accretion Star formation Formation of the accretion flow Stars Magnetic layer
2014/12/9
This thesis seeks to explain the nature of line emission observed in young stellar objects, and to use the lines as diagnostics of the accretion process that is central to star formation. We maintain ...
Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium
Fermi-LAT Observations Diffuse Gamma-Ray Emission Implications Cosmic Rays the Interstellar Medium
2012/2/23
The gamma-ray sky >100 MeV is dominated by the diffuse emissions from interactions of cosmic rays with the interstellar gas and radiation fields of the Milky Way. Observations of these diffuse emissio...
Rebirth of X-ray Emission from the Born-Again Planetary Nebula A 30
Rebirth X-ray Emission Born-Again Planetary Nebula
2012/2/23
The planetary nebula (PN) A 30 is believed to have undergone a very late thermal pulse resulting in the ejection of knots of hydrogen-poor material. Using multi-epoch HST images we have detected the a...
Central free-free-dominated 880 $\micron$ emission in II Zw 40
dust, extinction—galaxies: dwarf—galaxies: evolution—galaxies: individual(II Zw 40)— H II regions— submillimetre: galaxies
2011/10/20
The central star-forming region in a blue compact dwarf galaxy, II Zw 40, was observed in the 340 GHz ($880 \micron$) band at $\sim 5$ arcsec (250 pc) resolution with the Submillimetre Array (SMA). A ...
The beaming of external Compton emission
galaxies active radiation mechanisms nonthermal gamma rays theory
2011/10/21
We consider a relativistically moving blob consisting of an isotropic electron distribution that Compton-scatters photons from an external isotropic radiation field. We compute the resulting beaming p...
A Model For Polarised Microwave Foreground Emission From Interstellar Dust
Model Polarised Microwave Foreground Emission Interstellar Dust
2011/10/13
The upcoming generation of cosmic microwave background (CMB) experiments face a major challenge in detecting the weak cosmic B-mode signature predicted as a product of primordial gravitational waves. ...
X-ray spectroscopy of Abell S1101 with Chandra, XMM-Newton and ROSAT: band-pass dependence of he temperature profile and soft excess emission
X-ray spectroscopy Chandra band-pass dependence temperature profile soft excess emission
2011/9/28
We present spatially-resolved spectroscopy of the galaxy cluster Abell S1101, also known as Sersic 159-03, with Chandra, XMM-Newton and ROSAT, and investigate the presence of soft X-ray excess emissio...
Diffuse emission measurement with INTEGRAL/SPI as indirect probe of cosmic-ray electrons and positrons
INTEGRAL/SPI indirect probe cosmic-ray electrons positrons
2011/9/26
Significant advances have been made in the understanding of the diffuse Galactic hard X-ray continuum emission using data from the INTEGRAL observatory. The diffuse hard power-law component seen with ...
Mid-IR emission from the nucleus of Centaurus A。
The Emission from Photoionized Stellar Wind Bow Shocks
Photoionized Stellar Wind Bow Shocks
2009/6/25
The Emission from Photoionized Stellar Wind Bow Shocks。
Surveys for Pulsed Optical Emission from Radio Pulsars
Pulsed Optical Emission Radio Pulsars
2009/6/18
Surveys for Pulsed Optical Emission from Radio Pulsars。
New spectroscopic observations of dwarf nova BZ ursae Majoris with extremely unusual emission lines profiles
spectroscopic observations dwarf nova BZ ursae Majoris
2009/6/17
New spectroscopic observations of dwarf nova BZ ursae Majoris with extremely unusual emission lines profiles。
A Study of the Variability of Water Maser Emission in a Sample of Young Stellar Objects
Water Maser Emission Young Stellar Objects
2009/6/16
A Study of the Variability of Water Maser Emission in a Sample of Young Stellar Objects。
Non-Thermal Radio Emission from Single Hot Stars
Non-Thermal Radio Emission Single Hot Stars
2009/6/16
Non-Thermal Radio Emission from Single Hot Stars。