We studied the weak-lined T Tauri star Hubble 4, a known long-period binary, and its starspot phenomena. used optical radial velocity (RV) data taken over span of 14 years (2004-2010, 2017-2019) at McDonald Observatory 2.7m Harlan J. Smith telescope single epoch imaging from HST/WFC3 instrument. The observed apparent RV variations show contributions, respectively, binary motion as well large sp...

To construct the rotation curve of Galaxy, classical Cepheids with proper motions, parallaxes and line-of-sight velocities from Gaia DR2 Catalog are used in large part. The working sample formed literature data contains about 800 estimates their age. We determined that linear velocity Galaxy at a solar distance is $V_0=240\pm3$~km s$^{-1}$. In this case, Sun to axis found be $R_0=8.27\pm0.10$~k...

The degree to which the thin accretion disks of black hole X-ray binaries are truncated during hard spectral states remains a contentious open question in astrophysics. During its singular observed outburst $2009\mbox{--}2010$, binary XTE J1752-223 spent $\sim1$~month long-stable state at luminosity $\sim0.02\mbox{--}0.1~L_{\rm Edd}$. It was with 56 RXTE pointings this period, simultaneous Swif...

Gas morphology and kinematics in the Milky Way contain key information for understanding formation evolution of our Galaxy. We present a high resolution hydrodynamical simulation based on realistic barred potential constrained by recent observations. Our model can reproduce most features observed longitude-velocity diagram, including Central Molecular Zone, Near Far 3-kpc arms, Ring, spiral arm...

We employ a recently developed variant of the functional renormalization group method for spin systems, so-called pseudo Majorana group, to investigate three-dimensional spin-1/2 Heisenberg models at finite temperatures. study unfrustrated and frustrated systems on simple cubic pyrochlore lattices. Comparing our results with other quantum many-body techniques, we demonstrate high quantitative a...

Galactic model plays an important role in the microlensing field, not only for analyses of individual events but also statistics ensemble events. However, models used field varies, and some are unrealistically simplified. Here we tested three disc dynamic models, first is a simple standard that was widely this whereas other two consider radial dependence velocity dispersion, last model, asymmet...

Using CANUCS imaging we found an apparent major merger of two $z\sim5$ ultra-low-mass galaxies ($M_\star\sim10^{7}M_\odot$ each) that are doubly imaged and magnified $\sim$12-15$\times$ by the lensing cluster MACS 0417. Both experiencing young ($\sim$100 Myr), synchronised bursts star formation with $\log({\rm sSFR/Gyr^{-1}} )\sim$1.3-1.4, yet SFRs just $\sim 0.2 M_\odot\ {\rm yr}^{-1}$. They h...

We investigate the mass structure of a strong gravitational lens galaxy at $z=0.350$, taking advantage milli-arcsecond (mas) angular resolution very long baseline interferometric (VLBI) observations. In first analysis its kind this resolution, we jointly infer model parameters and pixellated radio source surface brightness. consider several models increasing complexity, starting from an ellipti...

A novel isochronous mass spectrometry, termed as $B\rho$-defined IMS, is established at the experimental cooler-storage ring CSRe in Lanzhou. Its potential has been studied through high precision measurements of $^{58}$Ni projectile fragments. Two time-of-flight detectors were installed one straight sections CSRe, thus enabling simultaneous velocity and revolution time each stored short-lived i...

It is still unclear whether the evolution of protoplanetary disks, a key ingredient in theory planet formation, driven by viscous turbulence or magnetic disk winds. As viscously evolving disks expand outward over time, sizes discriminant test for studying evolution. However, it how observed size changes time if Combining thermochemical code DALI with analytical wind-driven model presented Tabon...