Search Publications
Observational Detection of Higher-Order Secular Perturbations in Tight Hierarchical Triple Stars
Borkovits, Tamás; Mitnyan, Tibor
In this work, we search for observational evidence of higher-order secular perturbations in three eclipsing binaries. These are slightly eccentric binaries, and they form the inner pairs of tight, compact, hierarchical triple star systems. Simultaneously, we analyze the high-precision satellite (Kepler and TESS) light curves; eclipse timing variat…
The Purport of Space Telescopes in Supernova Research
Vinkó, József; Könyves-Tóth, Réka; Szalai, Tamás
The violent stellar explosions known as supernovae have received especially strong attention in both the research community and the general public recently. With the advent of space telescopes, the study of these extraordinary events has switched gears and it has become one of the leading fields in modern astrophysics. In this paper, we review som…
Oort Constants and Local Stellar Kinematics from GCNS
Qi, Zhaoxiang; Guo, Sufen
Oort constants and local kinematics are vital parameters with which to study the structure and dynamics of the Milky Way. When GCNS was published, it provided a clean sample of stars in the solar vicinity, which gives us an ideal tool with which to determine these parameters. Our aim was to calculate the reliable Oort constants with GCNS. We deter…
Constraining Young Hot Jupiter Occurrence Rate in Stellar Associations Using 2-min Cadence TESS Data
Ma, Bo; Fang, Yuanqing; Chen, Chen +1 more
The characterization of young planet distribution is essential for our understanding of the early evolution of exoplanets. Here we conduct a systematic search for young planets from young open clusters and associations using the 2-min cadence TESS survey data. We obtain TESS light curves for a total of 1075 young stars, which are selected with the…
The Dynamics of Earth's Cusp in Response to the Interplanetary Shock
Zong, Qiugang; Kistler, Lynn; Fu, Suiyan +9 more
The Earth's magnetospheric cusp, a region with an off-equatorial magnetic field minimum, is an important place which directly transports plasma and energy from the solar wind into the magnetosphere and ionosphere. Its magnetic topology and charged particles therein are known to respond to the solar wind and the interplanetary magnetic field. Howev…
Search for DA White Dwarf Binary Candidates from LAMOST DR7
Zhao, Gang; Zhao, Jing-Kun; Wang, Liang +4 more
We obtained spectroscopy data for 761 Degenerate A (DA)white dwarfs (WDs) with multiple LAMOST observations. The radial velocity (RV) of each spectrum was calculated using the cross-correlation function method (CCF), and 60 DA WD binary candidates were selected based on the variation of the RV. Then, the atmosphere parameter Teff, logg, and the ma…
3C 120 Disk/Corona vs. Jet Variability in X-rays
Fedorova, Elena; Del Popolo, Antonio
The 3C120 (Mrk 1506, UGC 03087, Mrk 9014) is a type 1 Seyfert (Sy1)/broad-line radio galaxy (BLRG) with intriguing variable jet activity featuring "dip" and "outburst" phases. Significant X-ray observational datasets have been collected for 3C120 by INTEGRAL, XMM-Newton, SWIFT, Suzaku, and other X-ray observational facilities. The overall X-ray sp…
Main Results from the ISSI International Team "Characterization of 67P Cometary Activity"
Longobardo, Andrea; Della Corte, Vincenzo; Fulle, Marco +8 more
The ESA/Rosetta mission accompanied the Jupiter Family Comet 67P/Churyumov-Gerasimenko and provided a huge amount of data which are providing important results about cometary activity mechanisms. We summarize the results obtained within the ISSI International Team Characterization of 67P cometary activity, which studied dust and gas ejection in di…