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SRG/eROSITA Survey in the Lockman Hole: Classification of X-ray Sources
Gilfanov, M. R.; Belvedersky, M. I.; Bykov, S. D.
We have classified the X-ray sources detected by the SRG/eROSITA telescope in the deep Lockman Hole survey. The goal of the classification has been the separation of the sources into Galactic and extragalactic objects. For this purpose, we have used the results of our previous cross-match of X-ray sources with optical catalogs. For the classificat…
Supernova remnant W51C: optical and X-ray emission analysis
Rosado, M.; Arias, L.; Reyes-Iturbide, J. +4 more
We present observations of the optical and X-ray emission from the Galactic supernova remnant W51C. From [S II] Fabry-Pérot interferometry and H α and [S II] images we detect filaments that are part of the optical counterpart of the supernova remnant. We obtain the kinematic distance to W51C, showing that it is one of the shortest distances report…
A radio continuum study of NGC 2082
Filipović, M. D.; Dai, S.; Barnes, L. +2 more
We present radio continuum observations of NGC 2082 using ASKAP, ATCA and Parkes telescopes from 888 MHz to 9000 MHz. Some 20 arcsec from the centre of this nearby spiral galaxy, we discovered a bright and compact radio source, J054149.24–641813.7, of unknown origin. To constrain the nature of J054149.24–641813.7, we searched for transient events …
MUSUBI (MegaCam Ultra-deep Survey: u*-band Imaging) Data for the COSMOS and SXDS Fields
Ouchi, Masami; Shimasaku, Kazuhiro; Ohyama, Youichi +11 more
The Subaru Hyper Suprime-Cam (HSC) Strategic Survey is the latest-generation multiband optical imaging survey for galaxy evolution and structure formation. The "Ultra-deep" component of the HSC survey provides grizy broadband images over ~3.4 deg2 to detection limits of ~26-28 AB, along with narrowband images, in the COSMOS and SXDS fie…
The Diffuse X-Ray Background of the Insight-HXMT/LE Telescope in the Galactic Plane
Zhang, Shu; Zhang, Shuang-Nan; Liu, Yuan +11 more
Accurately estimating of diffuse X-ray background (DXB) is essential for the investigation of sources in the Galactic plane observed with Insight-HXMT/LE, which is a collimated telescope in the soft X-ray energy band with a relatively large field of view. In the high-Galactic-latitude region, DXB is dominated by the cosmic X-ray background, which …
Search for the Metal-weak Thick Disk from the LAMOST DR5
Tian, Hao; Zhang, Bo; Shi, Jian-Rong +2 more
Based on the data release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope survey (LAMOST DR5) and the Gaia Early Data Release 3 (Gaia EDR3), we construct a sample containing 46,109 giant (log g ≤ 3.5 dex) stars with heliocentric distance d ≤ 4 kpc, and the sample is further divided into two groups of the inner (R GC <…
Ultra-short period contact binaries: restricting the parameters of the primary using Gaia parallax
Kurtenkov, Alexander
Possible M-type contact binaries were investigated by selecting W UMa-type variables with orbital periods below the 0.22-day cutoff. Gaia parallaxes were combined with Gaia and 2MASS photometry to obtain G and J-band absolute magnitudes of 674 red variable stars catalogued as contact binaries in the VSX database. The absolute magnitude of main seq…
Completing the X-ray view of the recently discovered supernova remnant G53.41+0.03
Vink, J.; Zhou, P.; Sun, L. +2 more
Aims: We present a detailed X-ray study of the recently discovered supernova remnant (SNR) G53.41+0.03, which follows up and further expands on the previous, limited analysis of archival data covering a small portion of the SNR.
Methods: With the new dedicated 70 ks XMM-Newton observation we investigate the morphological structure of the…
The Disk Population in a Distant Massive Protocluster
Tobin, John J.; Wang, Junfeng; Fedriani, Rubén +3 more
The unprecedented angular resolution and sensitivity of the Atacama Large Millimeter/submillimeter Array make it possible to unveil disk populations in distant (>2 kpc), embedded young cluster environments. We have conducted an observation toward the central region of the massive protocluster G286.21+0.16 at 1.3 mm. With a spatial resolution of…
Jet from the enigmatic high-latitude star BP Psc and evolutionary status of its driving source
Shakhovskoy, D. N.; Potravnov, Ilya S.; Khovritchev, M. Yu +1 more
BP Psc is an active late-type (sp:G9) star with unclear evolutionary status lying at high-galactic latitude b = -57°. It is also the source of the well collimated bipolar jet. We present results of the proper motion and radial velocity study of BP Psc outflow based on the archival Hα imaging with the GMOS camera at 8.1-m Gemini-North telescope as …