Hae
Aineistot 21-30 / 447
XMM-Newton observations of 1A 0535+262 in quiescence
Accretion onto magnetized neutron stars is expected to be centrifugally inhibited at low accretion rates. Several sources including 1A 0535+262, however, are known to pulsate in quiescence at luminosities below the theoretical ...
Barlenses in the CALIFA survey: Combining photometric and stellar population analyses
Aims: It is theoretically predicted that, at low galaxy inclinations, boxy/peanut bar components have a barlens appearance of a round central component embedded in the narrow bar. We investigate barlenses in the Calar Alto ...
Ringo2 Optical Polarimetry of Blazars
<table width="64"><colgroup><col width="64" /></colgroup><tbody><tr><td width="64"><br /></td></tr></tbody></table><p><br /></p>
Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400
<p>
The aim of this study is to carry out an abundance determination, to search for spectral variability and for the presence of a weak magnetic field in the typical PGa star HD 19400. High-resolution, high signal-to-noise ...
Investigating the Mini and Giant Radio Flare Episodes of Cygnus X-3
The microquasar Cygnus X-3 underwent a giant radio flare in 2017 April, reaching a maximum flux of similar to 16.5 Jy at 8.5 GHz. We present results from a long monitoring campaign carried out with Medicina at 8.5, 18.6, ...
Galaxy and Mass Assembly (GAMA): merging galaxies and their properties
<p>
We derive the close pair fractions and volume merger rates for galaxies in the Galaxy and Mass Assembly (GAMA) survey with -23 < M-r < -17 (Omega(M) = 0.27, Omega(A) = 0.73, H-0 = 100 km s(-1) Mpc(-1)) at 0.01 ...
MAGIC very large zenith angle observations of the Crab Nebula up to 100 TeV
Aims. We measure the Crab Nebula gamma-ray spectral energy distribution in the 100 TeV energy domain and test the validity of existing leptonic emission models at these high energies.Methods. We used the novel very large ...
The black hole-bulge mass relation in the megamaser host galaxies
We present Hubble Space Telescope (HST) images for nine megamaser disk galaxies with the primary goal of studying photometric BH-galaxy scaling relations. The megamaser disks provide the highest-precision extragalactic BH ...
Combined analysis of Hubble and VLT photometry of the intermediate mass black hole ESO 243-49 HLX-1
<p>
In this paper, we present a combined analysis of data obtained with the Hubble Space Telescope (HST), Very Large Telescope (VLT) and Swift X-ray telescope of the intermediate-mass black hole ESO 243-49 HLX-1 that ...
Morphology and environment of galaxies with disc breaks in the S4G and NIRS0S
<p>
We study the surface brightness profiles of disc galaxies in the 3.6 μm images from the Spitzer Survey of Stellar Structure in Galaxies (S4G) and Ks-band images from the Near-Infrared S0-Sa galaxy Survey (NIRS0S).We ...