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Close Galactic Encounter Leaves "Nearly Naked" Supermassive Black Hole
Close Galactic Encounter Leaves Nearly Naked Supermassive Black Hole
2016/11/29
Astronomers using the super-sharp radio vision of the National Science Foundation's Very Long Baseline Array (VLBA) have found the shredded remains of a galaxy that passed through a larger galaxy, lea...
Galactic Fireworks Illuminate Monster Hydrogen Blob
Galactic Fireworks Monster Hydrogen Blob
2016/9/29
An international team of researchers using the Atacama Large Millimeter/submillimeter Array (ALMA) and other telescopes has discovered the power source illuminating a so-called Lyman-alpha Blob – a ra...
New theoretical interpretation of images of double out-of-Galactic radiosources
New theoretical interpretation images double out-of-Galactic radiosources
2016/5/20
The author of the paper presents a quite new theoretical model of a double radiosource designed on the basis of the data of radiotelescopic observations and the new conception of the physics of active...
Galactic center's gamma rays unlikely to originate from dark matter,evidence shows
Galactic center gamma rays dark matter
2016/2/23
Bursts of gamma rays from the center of our galaxy are not likely to be signals of dark matter but rather other astrophysical phenomena such as fast-rotating stars called millisecond pulsars, accordin...
NOAO: Smashing Results About Our Nearby Galactic Neighbors
NOAO Smashing Results Nearby Galactic Neighbors
2015/1/8
The Magellanic Clouds are the two brightest nearby satellite galaxies to our own Milky Way galaxy. From a new study it appears that not only are they much bigger than astronomers calculated, but also ...
Metal enrichment of the intergalactic medium at z=3 by galactic winds
galactic winds intergalactic medium
2014/12/26
Studies of quasar absorption lines reveal that the low-density intergalactic medium (IGM) at z ~ 3 is enriched to between 10-3 and 10-2 solar metallicity. This enrichment may have occurred in an early...
This paper discusses a semi-numerical method of investigating
the enrichment of the intergalactic medium by galactic winds. We
find that most galaxies at z ～ > 3 should be driving winds, and that (i...
Detection of X-Ray Emission from the Arches Cluster near the Galactic Center
mass loss winds
2014/12/26
The Arches cluster is an extraordinarily compact massive star cluster with a core radius of about 10'' (~0.4 pc) and consisting of more than 150 O star candidates with initial stellar masses greater t...
Title: Chandra Observations of the Galactic Center and Nearby Edge-on Galaxies
Galactic Center Nearby Edge-on Galaxies
2014/12/26
I review our recent Chandra surveys of the center region of the Milky Way and other nearby edge-on galaxies. Our Galactic center survey provides an unprecedented high-resolution, broad-band X-ray pano...
Using data from the Two Micron All Sky Survey, we identify a population of infrared carbon stars with J-KS ≥ 2 in the Milky Way. These stars are shown to trace the stellar bar previously identified in...
Chandra Observation of the Edge-on Galaxy NGC 3556 (M108): Violent Galactic Disk-Halo Interaction Revealed
NGC 3556 spiral
2014/12/26
We present a 60 ks Chandra ACIS-S observation of the isolated edge-on spiral galaxy NGC 3556, together with a multiwavelength analysis of various discrete X-ray sources and diffuse X-ray features. Amo...
The Chandra Detection of Galactic Center X-Ray Features G359.89−0.08 and G359.54+0.18
neutron supernova remnants
2014/12/24
We report the detection of two elongated X-ray features, G359.89-0.08 and G359.54+0.18, in the Galactic center (GC) region using the Chandra X-Ray Observatory. G359.89-0.08 is an elongated X-ray featu...
A new population of X-ray transients in the Galactic Centre
X-ray transients the Galactic
2014/12/24
A comparison of the XMM-Newton and Chandra Galactic Centre (GC) Surveys has revealed two faint X-ray transients with contrasting properties. The X-ray spectrum of XMM J174544-2913.0 shows a strong iro...
Radio and Far-Infrared Emission as Tracers of Star Formation and Active Galactic Nuclei in Nearby Cluster Galaxies
AWM7 A426
2014/12/24
We have studied the radio and far-infrared (FIR) emission from 114 galaxies in the seven nearest clusters (<100 Mpc) with prominent X-ray emission to investigate the impact of the cluster environment ...
Evidence for Correlated Titanium and Deuterium Depletion in the Galactic ISM
abundances abundances
2014/12/24
Current measurements indicate that the deuterium abundance in diffuse interstellar gas varies spatially by a factor of ~4 among sightlines extending beyond the Local Bubble. One plausible explanation ...