搜索结果: 1-10 共查到“天文学 Hosts”相关记录10条 . 查询时间(0.09 秒)
X-ray Observations of Radio Transients without Optical Hosts
X-ray Observations Radio Transients without Optical Hosts
2011/10/19
We present a 50 ks Chandra ACIS-I X-ray observation of the Bower et al. VLA archival field. The observations reach a limiting sensitivity of ~1E-4 counts/s, corresponding to a flux of a few times 1E-1...
The Young, the Old, and the Dusty: Stellar Populations of AGN Hosts
Dusty: Stellar Populations AGN Hosts
2011/10/11
Studying the average properties of active galactic nuclei (AGN) host stellar populations is an important step in understanding the role of AGN in galaxy evolution and the processes which trigger and f...
Assessing the redshift evolution of massive black holes and their hosts
quasars: general { galaxies: evolution { galaxies: formation { black hole physics
2011/9/30
Motivated by recent observational results that focus on high redshift black holes, we explore the effect of scatter and observational biases on the ability to recover the intrinsic properties of the b...
AGN Unification at z ~ 1: u - R Colors and Gradients in X-ray AGN Hosts
Unification Colors Gradients Hosts
2011/10/8
We present uncontaminated rest-frame u - R colors of 78 X-ray-selected AGN hosts at 0.5 < z < 1.5 in the Chandra Deep Fields measured with HST/ACS/NICMOS and VLT/ISAAC imaging. We also present spatial...
The Origin of [OII] Emission in Recently Quenched AGN Hosts
galaxies active — galaxies clusters general — galaxies evolution X-rays galaxies
2010/11/11
We have employed emission-line diagnostics derived from DEIMOS and NIRSPEC spectroscopy to
determine the origin of the [OII] emission line observed in six AGN hosts at z 0.9. These galaxies are a s...
The WFC3 Galactic Bulge Treasury Program: Metallicity Estimates for the Stellar Population and Exoplanet Hosts
Galaxy bulge — Galaxy formation — Galaxy stellar content — stars
2010/11/10
We present new UV-to-IR stellar photometry of four low-extinction windows in the Galactic bulge, obtained with the Wide Field Camera 3 on the Hubble Space Telescope (HST). Using our five bandpasses, w...
Spectral Energy Distribution of z>1 Type Ia Supernova Hosts in GOODS: Constraints on Evolutionary Delay and the Initial Mass Function
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/6
We identify a sample of 22 host galaxies of Type Ia Supernovae (SNe Ia) at redshifts 0.95HST) observations of the Great Observatories Origins Deep Surv...
Evolution of intermediate mass galaxies up to z~0.7 and studies of SNe Ia hosts
Evolution of intermediate mass galaxies studies of SNe Ia hosts
2010/11/12
My life is like a Babel tower: it is spread among severals european countries, France, Spain and Portugal. My acknowledgments cannot thus escape to be multi-language.
The LABOCA survey of the Extended Chandra Deep Field South: Two modes of star formation in AGN hosts?
galaxies active galaxies starburst infrared galaxies
2010/3/8
We study the co-existence of star formation and AGN activity in X-ray selected AGN by analyzing stacked 870um submm emission from a deep and wide map of the Extended Chandra Deep Field South, obtained...
Asteroseismic Investigation of Known Planet Hosts in the Kepler Field
stars fundamental parameters stars oscillations planetary systems
2010/3/8
In addition to its great potential for characterizing extra-solar planetary systems the Kepler mission is providing unique data on stellar oscillations. A key aspect of Kepler asteroseismology is the ...