搜索结果: 1-15 共查到“星系与宇宙学 disks”相关记录19条 . 查询时间(0.078 秒)
Gaps in the cloud cover? Comparing extinction measures in spiral disks
dust in galaxies spiral galaxies
2014/12/23
Dust in galaxies can be mapped either by the FIR/submillimeter emission, the optical or infrared reddening of starlight, or the extinction of a known background source. We compare two dust extinction ...
The quantity of dust in a spiral disk can be estimated using the dust's typical emission or the extinction of a known source. In this paper we compare two techniques, one based on emission and one on ...
The Evolution of Galaxy Disks in Dense Environments - Lessons from Compact Galaxy Groups
evolution interactions
2014/12/23
Disk galaxies in compact galaxy groups exhibit a remarkable shortfall of neutral hydrogen compared to both isolated spirals and spirals in more loose groups, but the origin of this HI deficiency remai...
Spitzer Observations of the Lambda Orionis cluster I: the frequency of young debris disks at 5 Myr,
formation pre-main sequence
2014/12/22
We present IRAC/MIPS Spitzer observations of intermediate-mass stars in the 5 Myr old Lambda Orionis cluster. In a representative sample of stars earlier than F5 (29 stars), we find a population of 9 ...
The opacity of a spiral disk due to dust absorption influences every measurement we make of it in the UV and optical. Two separate techniques directly measure the total absorption by dust in the disk:...
SPITZER OBSERVATIONS OF THE λ ORIONIS CLUSTER. II. DISKS AROUND SOLAR-TYPE AND LOW-MASS STARS
solar-type the low-mass stellar population
2014/12/22
We present IRAC/MIPS Spitzer Space Telescope observations of the solar-type and the low-mass stellar population of the young (~5 Myr) λ Orionis cluster. Combining optical and Two Micron All Sky Survey...
The Stability of Low Surface Brightness Disks Based on Multi-Wavelength Modeling
Stability Surface Brightness Disks Based Multi-Wavelength Modeling
2011/10/18
To investigate the structure and composition of the dusty interstellar medium (ISM) of low surface brightness (LSB) disk galaxies, we have used multiwavelength photometry to construct spectral energy ...
To explore the properties of extreme outer stellar disks, we obtained ultra-deep V and GALEX UV images of 4 dwarf irregular galaxies and one Blue Compact Dwarf galaxy and ultra-deep B images of 3 of t...
Chemical history of molecules in circumstellar disks
astrochemistry – stars: formation – circumstellar matter – planetary systems: pro- toplanetary disks – molecular processes
2011/10/8
The chemical composition of a protoplanetary disk is determined not only by in situ chemical processes during the disk phase, but also by the history of the gas and dust before it accreted from the na...
Can Self Organized Critical Accretion Disks Generate a Log-normal Emission Variability in AGN?
Accretion accretion disks
2011/9/29
Active Galactic Nuclei (AGN), such as Seyfert galaxies, quasars, etc., show light variations in all wavelength bands, with various amplitude and in many time scales. The variations usually look errati...
WWW Database of Models of Accretion Disks Irradiated by the Central Star
WWW Database Central Star Disks Irradiated
2009/6/25
WWW Database of Models of Accretion Disks Irradiated by the Central Star。
The Optical-NIR Opacity Law in YSO Disks and Envelopes：Evidence for Dust Growth?
YSO Disks Dust Growth
2009/6/18
The Optical-NIR Opacity Law in YSO Disks and Envelopes：Evidence for Dust Growth?
The Optical-NIR Opacity Law in YSO Disks and Envelopes：Evidence for Dust Growth?
YSO Disks Dust Growth
2009/6/16
The Optical-NIR Opacity Law in YSO Disks and Envelopes：Evidence for Dust Growth?
Constraining the evolutionary histories of spiral disks
evolutionary histories spiral disks
2009/6/11
Constraining the evolutionary histories of spiral disks。
Hα Fabry-Perot Study in the Orion Nebula (M 42)：Protoplanetary Disks
Orion Nebula Protoplanetary Disks
2009/6/9
Hα Fabry-Perot Study in the Orion Nebula (M 42)：Protoplanetary Disks。