Search Publications
Exploring the Fundamental Mechanism in Driving Highest-Velocity Ionized Outflows in Radio AGNs
Xue, Yongquan; Woo, Jong-Hak; He, Zhicheng +4 more
We investigate the ionized gas kinematics relationship with X-ray, radio and accreting properties using a sample of 348 nearby (z<0.4) SDSS-FIRST-X-ray detected AGNs. X-ray properties of our sample are obtained from XMM-Newton, Swift and Chandra observations. We unveil the ionized gas outflows in our sample manifested by the non-gravitational b…
An Updated View of the Milky Way from Maser Astrometry
Immer, Katharina; Rygl, Kazi L. J.
Astrometric observations of maser sources in the Milky Way, using the Very Long Baseline Interferometry (VLBI) technique, have been exploited to determine the spiral structure of our Galaxy. Several major spiral arms have now been pinpointed in the first and second Galactic quadrants. Fundamental Galactic parameters such as the distance to the Gal…
The Stationary Electric Field in the Heliosphere and Its Possible Relation to Current Sheets
Kislov, Roman A.
The nature of the large-scale electric field in the heliosphere is discussed in this paper. The electric potential along each line of the magnetic field should be constant in the ideally conductive solar wind. A high electric potential is supposed to be maintained by the rapidly flowing solar wind far from the Sun and, near the Sun, by the unipola…
The Effect of Age on the Grouping of Open Clusters: II—Are There Old Binary Clusters?
Casado, Juan
In the present study, we continue testing the Primordial Group hypothesis (Casado 2022), which postulates that only sufficiently young open clusters can be binary or multiple, and old clusters are essentially single. To this end, we revisit all the remaining binary cluster candidates in the Galaxy having at least one cluster older than 100 Myr thr…
Ulysses Flyby in the Heliosphere: Comparison of the Solar Wind Model with Observational Data
Malova, Helmi V.; Popov, Victor Yu.; Zelenyi, Lev M. +1 more
A model capable of reproducing a set of solar wind parameters along the virtual spacecraft orbit out of an ecliptic plane has been developed. In the framework of a quasi-stationary axisymmetric self-consistent MHD model the spatial distributions of magnetic field and plasma characteristics at distances from 20 to 1200 Solar radii at almost all sol…
Antarctic Survey Telescope 3-3: Overview, System Performance and Preliminary Observations at Yaoan, Yunnan
Wang, Lifan; Hu, Lei; Hu, Maokai +17 more
The third Antarctic Survey Telescope array instrument at Dome A in Antarctica, the AST3-3 telescope, has been in commissioning from March 2021. We deployed AST3-3 at the Yaoan astronomical station in Yunnan Province for an automatic time-domain survey and follow-up observations with an optimised observation and protection system. The telescope sys…
Assessment of Dark Matter Models Using Dark Matter Correlations across Dwarf Spheroidal Galaxies
Borzou, Ahmad
The predicted size of dark matter substructures in kilo-parsec scales is model-dependent. Therefore, if the correlations between dark matter mass densities as a function of the distances between them are measured via observations, we can scrutinize dark matter scenarios. In this paper, we present an assessment procedure of dark matter scenarios. F…
Determination of the Physical Parameters of AGNs in Seyfert 1 Galaxies LEDA 3095839 and VII Zw 244 Based on Spectropolarimetric Observations
Shablovinskaya, Elena; Piotrovich, Mikhail; Malygin, Eugene +2 more
Here we present the detailed investigation of AGNs in two Seyfert 1 galaxies, LEDA 3095839 and VII Zw 244. Both of them were observed within the photometric reverberation mapping project in Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS), during which we earlier obtained the SMBHs masses. After that, both galaxies we…
Description and Application of the Surfing Effect
Nucita, Achille A.; De Paolis, Francesco; Maiorano, Michele
The standard technique for very low-frequency gravitational wave detection is mainly based on searching for a specific spatial correlation in the variation of the times of arrival of the radio pulses emitted by millisecond pulsars with respect to a timing model. This spatial correlation, which in the case of the gravitational wave background must …
Study of Intra-Day Flux Distributions of Blazars Using XMM-Newton Satellite
Gaur, Haritma; Wani, Kiran
We present a study of the flux distribution of a sample of 15 Intermediate and Low-energy peaked blazars using XMM-Newton observations in a total of 57 epochs on short-term timescales. We characterise the X-ray variability of all of the light curves using excess fractional variability amplitude and found that only 24 light curves in 7 sources are …