Search Publications
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 …
Two newly identified eclipsing binaries in open cluster NGC 3532
Özdarcan, O.
We present light-curve analyses of two newly identified detached eclipsing binaries, namely HD 96609 and HD 303734, in the region of the richly populated open cluster NGC 3532. HD 96609 is composed of two main sequence stars (B9-A0V + A2V) with masses and radii of M1 = 2.66 ± 0.02 M⊙, M2 = 1.84 ± 0.01 M⊙…
Adjusting the bow-tie: a morpho-kinematic study of NGC 40
López, J. A.; Estrada-Dorado, S.; Guerrero, M. A. +4 more
We present a comprehensive study of the ionization structure and kinematics of the planetary nebula (PN) NGC 40 (a.k.a. the Bow-tie Nebula). A set of narrow-band images obtained with the Alhambra Faint Object Spectrograph and Camera at the Nordic Optical Telescope are used to study the turbulent distribution of gas in the main cavity, the ionizati…
Discovery of a Short Period Pulsator from Istanbul University Observatory
Güver, Tolga; Sağlam, Mustafa Turan; Çördük, Meryem +8 more
We report the discovery of a new short period pulsating variable in the field of exoplanet host star XO-2. Variable has been identified while it was being used as a comparison. In order to verify the variability of the candidate, a comprehensive follow-up was carried out. Period analysis of multi-band light curves revealed a very prominent and con…