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The optical/UV excess of isolated neutron stars in the RCS model
pulsars: individual RX J1308.6+2127 stars:neutron
2011/9/28
The X-ray dim isolated neutron stars (XDINSs) are peculiar pulsar-like objects, characterized by their very well Planck-like spectrum. In studying their spectral energy distributions, the optical/UV e...
Intrinsic disc emission and the Soft X-ray Excess in AGN
X-rays: accretion discs black hole physics
2011/10/18
Narrow Line Seyfert 1 (NLS1) galaxies have low mass black holes and mass accretion rates close to (or exceeding) Eddington, so a standard blackbody accretion disc should peak in the EUV. However, the ...
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...
Multiwavelength campaign on Mrk 509. IV. Optical-UV-X-ray variability and the nature of the soft X-ray excess
galaxies: active – galaxies: nuclei – galaxies: Seyfert – quasars: individual: Mrk 509 – X-rays: galaxies
2011/9/27
We present the analysis of XMM-Newton and Swift optical-UV and X-ray observations of the Seyfert-1/QSO Mrk 509, part of an unprecedented multi-wavelength campaign, investigating the nuclear environmen...
We report the results of a recent study of young star clusters (YSCs) in luminous blue compact galaxies (BCGs). The age distributions of the YSCs suggest that the starburst episode in Haro 11, ESO 185...
An extremely peculiar hot subdwarf with a ten-thousand-fold excess of zirconium, yttrium, and strontium
hot subdwarf ten-thousand-fold
2011/1/10
Helium-rich subdwarf B (He-sdB) stars represent a small group of low-mass hot stars with luminosities greater than those of conventional subdwarf B stars, and effective temperatures lower than those o...
Studies of Diffuse Interstellar Bands. V. Pairwise Correlations of Eight Strong DIBs and Neutral Hydrogen, Molecular Hydrogen, and Color Excess
ISM lines and bands − ISM molecules
2010/11/15
We establish correlations between equivalent widths of eight diffuse interstel-lar bands (DIBs), and examine their correlations with atomic hydrogen, molec-ular hydrogen, and EB−V . The DIBs are...
The effect of the infrared excess from the Be star on inverse Compton gamma-ray production in PSR B1259-63/SS 2883
radiation mechanisms non-thermal – pulsars individual PSR B1259-63–X-rays binaries
2010/11/12
The binary system PSR B1259-63 consists of a 48 ms pulsar in a 3.4 year or-bit around a Be star and unpulsed TeV gamma-ray emission has been detected near previous periastron passages.
On the origin of the red excess in very young super star clusters: the case of SBS 0335-052E
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/7
The spectral energy distribution analysis of very young unresolved star clusters challenges our understanding of the cluster formation process. Studies of resolved massive clusters in the Milky Way an...
A Slight Excess of Large Scale Power from Moments of the Peculiar Velocity Field
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/29
The peculiar motions of galaxies can be used to infer the distribution of matter in the Universe. It has recently been shown that measurements of the peculiar velocity field indicates an anomalously h...
The big blue bump and soft X-ray excess of individual quasars
big blue bump individual quasars soft X-ray excess
2009/7/9
The big blue bump and soft X-ray excess of individual quasars。
MONITORING ACTIVE STARS 29 DRA,12 CAM AND COLOUR EXCESS OF II PEG
Stars late type-starspots-Stars individual 29 Dra, 12 Cam, II Peg
2009/2/11
We present the BV light curves analysis of late-type, long-period
stars 29 Dra, 12 Cam for the season 2005/2006, and shorter-period star II Peg for
the same season. High latitude spots (alternativel...