21 citations · 68 across the 8 of their papers we have counts for
9 papers
TESS Pulsation Timing Reveals the JWST Calibration Star HD 158485 as a Double-pulsator Binary
Chenglong Lv, Ali Esamdin, Shuguo Ma +5
HD~158485 is an A-type ~Scuti star in the CALSPEC network and the JWST absolute-flux calibration program. Gaia DR3 assigns it a binary classification probability close to unity…
TESS Observations of Seven Newly Identified High-amplitude Scuti Stars
Chenglong Lv, Ali Esamdin, Amir Hasanzadeh +3
We report seven newly identified high-amplitude Scuti (HADS) stars. Among them, two stars (TIC 30977864 and TIC 387379145) exhibit pure radial pulsation without the excitation…
Dynamical Mass Loss at the End of TP-AGB stars
Yingzhen Cui, Song Wang, Xiangcun Meng +3
The thermally pulsating asymptotic giant branch (TP-AGB) phase plays a key role in the evolution of low- to intermediate-mass stars, driving mass loss that influences their final s…
SN 2021hpr: A Normal Type Ia Supernova Showing Excess Emission in the Early Rising Phase
Abdusamatjan Iskandar, Xiaofeng Wang, Ali Esamdin +37
We present extensive optical observations of a nearby Type Ia supernova (SN Ia), SN 2021hpr, located in the spiral galaxy NGC 3147 at a distance of 45 Mpc. Our observations…
Site-testing at the Muztagh-ata Site.V. Nighttime Cloud Amount during the Last Five Years
Jing Xu, Guo-jie Feng, Guang-xin Pu +12
The clarity of nights is the major factor that should be carefully considered for optical/infrared astronomical observatories in site-testing campaigns. Cloud coverage is directly…
An X-Ray-dim "Isolated'' Neutron Star in a Binary?
Jie Lin, Chunqian Li, Weiyang Wang +13
We report the discovery of a dark companion to 2MASS J15274848+3536572 with an orbital period of 6.14 hr. Combining the radial velocity from LAMOST observations and modelling of th…
KIC 10417986: Spectroscopic confirmation of the nature of the binary system with a δ Scuti component
Guo-Jie Feng, Ali Esamdin, Jian-Ning Fu +9
KIC 10417986 is a short orbital period (0.0737 d) ellipsoidal variable star with a δ Scuti and γ Doradus hybrid pulsations component discovered by Kepler. The ground-based spectros…
The Wide-field Photometric System of the Nanshan One-meter Telescope
Chunhai Bai, Guojie Feng, Xuan Zhang +9
The Nanshan One-meter Wide-field Telescope (NOWT) is a prime focus system located at Nanshan Station of Xinjiang Astronomical Observatories (XAO). The field of view(FOV) was design…
Physical Properties of H II Regions in M51 from Spectroscopic Observations
Peng Wei, Hu Zou, Xu Kong +13
M51 and NGC 5195 is an interacting system that can be explored in great details with ground-based telescopes. The H II regions in M51 were observed using the 2.16 m telescope of th…