Search Publications
X-Ray and Gamma-Ray Observations of the Fermi Bubbles and NPS/Loop I Structures
Nakashima, Shinya; Inoue, Yoshiyuki; Kataoka, Jun +3 more
The Fermi bubbles were possibly created by large injections of energy into the Galactic Center (GC), either by an active galactic nucleus (AGN) or by nuclear starburst more than ~10 Myr ago. However, the origin of the diffuse gamma-ray emission associated with Loop I, a radio continuum loop spanning across 100° on the sky, is still being debated. …
Verification of Photometric Parallaxes with Gaia DR2 Data
Zhao, Gang; Karpov, Sergey; Sytov, Alexey +10 more
Results of comparison of Gaia DR2 parallaxes with data derived from a combined analysis of 2MASS (Two Micron All-Sky Survey), SDSS (Sloan Digital Sky Survey), GALEX (Galaxy Evolution Explorer), and UKIDSS (UKIRT Infrared Deep Sky Survey) surveys in four selected high-latitude |b|> 48° sky areas are presented. It is shown that multicolor photome…
Testing the Anomalous Growth of the Black Hole Radius from AGN
Addazi, Andrea; Marciano, Antonino; Qian, Chenyang
We analyze constraints on the anomalous growth of the black hole radius or the black hole spin from the X-rays spectrum data of Active Galactic Nuclei (AGN) in NGC 5506. The anomalous growth of the mass or of the spin of a black hole may be unveiled within the framework of models of alternative gravity, including f(R)-gravity. Our phenomenological…
A Changing-Look AGN to Be Probed by X-ray Polarimetry
Miniutti, Giovanni; Agís-González, Beatriz; Hutsemékers, Damien
Active galactic nuclei (AGN) produce the highest intrinsic luminosities in the Universe from within a compact region. The central engine is thought to be powered by accretion onto a supermassive black hole. A fraction of this huge release of energy influences the evolution of the host galaxy, and in particular, star formation. Thus, AGN are key as…
Spectroscopy of Planetary Nebulae with Herschel: A Beginners Guide
Exter, Katrina
A brief overview of the Herschel Space Telescope PACS and SPIRE spectrographs is given, pointing out aspects of working with the data products that should be considered by anyone using them. Some preliminary results of Planetary Nebulae (PNe) taken from the Herschel Planetary Nebula Survey (HerPlaNs) programme are then used to demonstrate what can…