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…

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…