Search Publications
Constraining Mass of M31 Combing Kinematics of Stars, Planetary Nebulae and Globular clusters
Fan, Zhou; Zhu, Ling; Liu, Cheng +2 more
We construct a multiple-population discrete axisymmetric Jeans model for the Andromeda (M31) galaxy, considering three populations of kinematic tracers: 48 supergiants and 721 planetary nebulae (PNe) in the bulge and disk regions, 554 globular clusters extending to ~30 kpc, and halo stars extending to ~150 kpc of the galaxy. The three populations …
Strong Spatial Aggregation of Martian Surface Temperature Shaped by Spatial and Seasonal Variations in Meteorological and Environmental Factors
Li, Fei; Barriot, Jean-Pierre; Luo, Yao-Wen +1 more
Spatio-temporal variation in the Martian surface temperature (MST) is an indicator of ground level thermal processes and hence a building block for climate models. However, the distribution of MST exhibits different levels of spatial aggregation or heterogeneity, and varies in space and time. Furthermore, the effect of regional differences in mete…
Molecular Clouds Associated with H II Regions and Candidates within l = 106.°65 to 109.°50 and b = -1.°85 to 0.°95
Zheng, Yu-Qing; Wang, Hong-Chi; Ma, Yue-Hui +3 more
We present a large-scale simultaneous survey of the CO isotopologues (12CO, 13CO, and C18O) J = 1-0 line emission toward the Galactic plane region of l = 106.°65 to 109.°50 and b = -1.°85 to 0.°95 using the Purple Mountain Observatory 13.7 m millimeter-wavelength telescope. Except for the molecular gas in the solar…
The First Photometric Study of AH Mic Contact Binary System
Poro, Atila; Blackford, M. G.; Ranjbar Salehian, S. +7 more
The first multi-color light curve analysis of the AH Mic binary system is presented. This system has very few past observations from the southern hemisphere. We extracted the minima times from the light curves based on the Markov Chain Monte Carlo (MCMC) approach and obtained a new ephemeris. To provide modern photometric light curve solutions, we…
Analysis of TESS Field Eclipsing Binary Star V948 Her: A Pulsating or Non-pulsating Star?
Kahraman Aliçavuş, F.; Ekinci, Ö.
Pulsating stars occupy a significant place in the H-R diagram and it was thought that all stars inside the classical instability strip should pulsate. However, recent studies showed that there are many non-pulsating stars located inside the classical instability strip. The existence of these non-pulsating stars is still a mystery. To deeply unders…
HT Lyn and IR Lyn: Two Semi-detached-type Near-contact Binaries with Stable Orbital Period
Meng, Zi-Bin; Wang, Hong-Wei; Yu, Yun-Xia +2 more
We presented the first photometric and orbital period investigations for two near-contact binaries: HT Lyn and IR Lyn. The light-curves solutions derived from both our ground-based and various surveys' observations suggested that HT Lyn and IR Lyn are two semi-detached-type near-contact binaries with the secondary and primary components filling th…
The Stellar Abundances and Galactic Evolution Survey: Photonic Passbands and Extinction Coefficients for the u and v Bands
Tan, Ke-Feng; Zhao, Gang; Fan, Zhou +6 more
The Stellar Abundances and Galactic Evolution Survey (SAGES) is a multi-band photometric survey focused on estimation of stellar atmospheric parameters and interstellar extinction. In this paper we have derived photonic passbands for the intermediate-band u and v filters of the SAGES photometric system. The derived photonic passbands have been com…
New Apsidal Motion in Four Eccentric Eclipsing Binaries: V610 Car, V944 Cep, V2815 Ori and V1260 Tau
Bulut, Ahmet
This paper presents an apsidal motion analysis. The apsidal motion analysis of the eccentric eclipsing binaries V610 Car (P = 4.84 days), V944 Cep (P = 6.56 days), V2815 Ori (P = 2.13 days), and V1260 Tau (P = 5.43 days) was performed using minima times from the O-C Gateway database, ASAS-3, ASAS-SN, and TESS, following Lacy's approach. The rates …
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 <…
Analyzing Dominant 13.5 and 27 day Periods of Solar Terrestrial Interaction: A New Insight into Solar Cycle Activities
Saikia, Eeshankur; Syiemlieh, Rissnalin; Adhikary, Manashee +1 more
Our analysis presents an explanation of the Sun-Earth coupling mechanism during declining phase of a solar cycle, and how the dominant 13.5 and 27 day periods play roles in the coupling mechanism which led to intense terrestrial magnetic storms during this declining phase compared to the rising phase of a solar cycle. Moreover, it is observed that…