搜索结果: 1-15 共查到“天体物理学 IR”相关记录18条 . 查询时间(0.08 秒)
Optical and Near-IR long-term monitoring of NGC3783 and MR2251-178: evidence for variable near-IR emission from thin accretion discs
Seyfert galaxies:general ?Seyfert galaxies:individual
2011/8/24
We present long term near-IR light curves for two nearby AGN: NGC3783 and MR2251-178. The near-IR data are complemented with optical photometry obtained over the same period of time.
We present an overview of a few spectroscopic diagnostics of massive stars. We explore the following wavelength ranges: UV (1000 to 2000 A), optical (4000--7000 A) and near-infrared (mainly H and K ba...
A photoionization model of the spatial distribution of the optical and mid-IR properties in NGC595
photoionization model the spatial distribution
2011/1/13
We present a set of photoionization models that reproduce simultaneously the observed optical and mid-infrared spatial distribution of the HII region NGC595 in the disk of M33 using the code CLOUDY. B...
A photoionization model of the spatial distribution of the optical and mid-IR properties in NGC595
photoionization model the spatial distribution the optical
2011/1/13
We present a set of photoionization models that reproduce simultaneously the observed optical and mid-infrared spatial distribution of the HII region NGC595 in the disk of M33 using the code CLOUDY. B...
Synchrotron Blob Model of IR and X-ray Flares from Sagittarius A$^*$
acceleration of particles black hole physics Galaxy center radiation mechanisms: nonthermal
2010/11/11
Sagittarius A∗ in the Galactic center harbors a supermassive black hole and exhibits various active phenomena. Besides quiescent emission in radio and sub-millimeter radiation, flares in the nea...
A method to determine distances to molecular clouds using near-IR photometry
ISM dust extinction – ISM clouds – Stars distances – ISM individual objects L1517 –ISM Chamaeleon I –ISM
2010/11/15
Aims. To develop a method to determine distances to molecular clouds using JHK near-infrared photometry.Methods. The method is based on a technique that aids spectral classification of stars lying tow...
ACCESS II: A Complete Census of Star Formation in the Shapley Supercluster - UV and IR Luminosity Functions
Star Formation the Shapley Supercluster - UV IR Luminosity Functions
2011/1/10
We present panoramic Spitzer/MIPS mid- and far-infrared and GALEX ultraviolet imaging of the the most massive and dynamically active system in the local Universe, the Shapley supercluster at z=0.048, ...
Mass loss rates inferred from mid-IR color excesses of LMC and SMC O stars
Solar and Stellar Astrophysics (astro-ph.SR) Galaxy Astrophysics (astro-ph.GA)
2011/1/6
We use a combination of VJHK and Spitzer} [3.6], [5.8] and [8.0] photometry, to determine IR excesses in a sample of LMC and SMC O stars.
Near-IR Molecular Hydrogen Emission of Protostars: Probing Circumstellar Environments
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/28
We present new observations of near-infrared molecular hydrogen (H2) line emission in a sample of 18 Class I and flat-spectrum low mass protostars, primarily in the Tau- Aur and {\rho} Oph dark clouds...
Occultation of the Quiescent Emission from Sgr A* by IR Flares
Galaxy Astrophysics (astro-ph.GA)
2010/12/27
We have investigated the nature of flare emission from Sgr A* during multi-wavelength observations of this source that took place in 2004, 2005 and 2006. We present evidence for dimming of submm and r...
Observations of dusty torii and compact disks around evolved stars: the high spatial resolution IR view
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
The recent high angular resolution observations have shown that the transition between a globally symmetrical giant and a source surrounded by a spatially complex environment occurs relatively early, ...
Quantum UV/IR Relations and Holographic Dark Energy from Entropic Force
Quantum UV/IR Holographic Dark Energy Entropic Force
2010/3/19
We investigate the implications of the entropic force formalism proposed by Verlinde. We show that an UV/IR relation proposed by Cohen et al, as well as an uncertainty principle proposed by Hogan can ...
Spatially-resolved mid-ir spectroscopy of ngc 1068。
Dust obscuration events of the symbiotic nova RR tel in The near ir
symbiotic nova RR tel The near ir
2009/6/17
Dust obscuration events of the symbiotic nova RR tel in The near ir。
