Search Publications
Temporal-spatial distribution of YSOs nearby Taurus region
Fang, Min; Deng, Licai; Wang, Xiaolong +3 more
The Taurus region is one of the most extensively studied star-forming regions (SFRs). Surveys indicate that the young stars in this region are comprised of young stellar objects (YSOs) that cluster in groups associated with the molecular cloud (Grouped Young Stellar Objects, GYSOs), and some older ones that are sparsely distributed throughout the …
Intermediate-mass black holes in Green pea galaxies (IMBH-GP) I: A candidate sample from LAMOST and SDSS
Jiang, Linhua; Zheng, Zhen-Ya; Wang, Jun-Xian +8 more
The scaling relation of central massive black holes (MBHs) and their host galaxies is well-studied for supermassive BHs (SMBHs, MBH ≥ 106M⊙). However, this relation has large uncertainties in the mass range of the intermediate-mass BHs (IMBHs, MBH ∼ 103–106M⊙). Since Gree…
The nearest neutron star candidate in a binary revealed by optical time-domain surveys
Liu, Jifeng; Weng, Shan-Shan; Bai, Yu +19 more
The near-Earth (within ∼100 pc) supernova explosions in the past several million years can cause the global deposition of radioactive elements (e.g., 60Fe) on Earth. The remnants of such supernovae are too old to be easily identified. It is therefore of great interest to search for million-year-old near-Earth neutron stars or black hole…
Compact object candidates with K/M-dwarf companions from LAMOST low-resolution survey
Gu, Wei-Min; Sou, Hao; Yi, Tuan +6 more
Searching for compact objects (black holes, neutron stars, or white dwarfs) in the Milky Way is essential for understanding the stellar evolution history, the physics of compact objects, and the structure of our Galaxy. Compact objects in binaries with a luminous stellar companion are perfect targets for optical observations. Candidate compact obj…
Primordial black holes and secondary gravitational waves from chaotic inflation
Gao, Qing
Chaotic inflation is inconsistent with the observational constraint at 68% CL. Here, we show that the enhancement mechanism with a peak function in the noncanonical kinetic term not only helps the chaotic model V(ϕ) = V0ϕ1/3 satisfy the observational constraint at large scales but also enhances the primordial scalar power spe…
The TMRT K band observations towards 26 infrared dark clouds: NH3, CCS, and HC3N
Duan, Yan; Li, Di; Liu, Tie +9 more
We present one of the first Shanghai Tian Ma Radio Telescope (TMRT) K Band observations towards a sample of 26 infrared dark clouds (IRDCs). We observed the (1,1), (2,2), (3,3), and (4,4) transitions of NH3 together with CCS (21–>10) and HC3N J = 2–1, simultaneously. The survey dramatically increases …
The mass of our Milky Way
Ishigaki, Miho N.; Cautun, Marius; Wang, WenTing +2 more
We perform an extensive review of the numerous studies and methods used to determine the total mass of the Milky Way. We group the various studies into seven broad classes according to their modeling approaches. The classes include: i) estimating Galactic escape velocity using high velocity objects; ii) measuring the rotation curve through termina…
More than softer-when-brighter: The X-ray powerlaw spectral variability in NGC 4051
Cai, Zheng; Kang, Jia-Lai; Cai, Zhen-Yi +3 more
The powerlaw X-ray spectra of active galactic nuclei at moderate to high accretion rates normally appear softer when they brighten, for which the underlying mechanisms are yet unclear. Utilizing XMM-Newton observations and excluding photons < 2 keV to avoid contamination from the soft excess, in this work we scrutinize the powerlaw spectral var…
Physics and astrophysics of strong magnetic field systems with eXTP
Paul, Biswajit; Feng, Hua; Göğüş, Ersin +38 more
In this paper we present the science potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies of strongly magnetized objects. We will focus on the physics and astrophysics of strongly magnetized objects, namely magnetars, accreting X-ray pulsars, and rotation powered pulsars. We also discuss the science potential of eXTP f…
Searching for sterile neutrinos in dynamical dark energy cosmologies
Feng, Lu; Zhang, Jing-Fei; Zhang, Xin
We investigate how the dark energy properties change the cosmological limits on sterile neutrino parameters by using recent cosmological observations. We consider the simplest dynamical dark energy models, the wCDM model and the holographic dark energy (HDE) model, to make an analysis. The cosmological observations used in this work include the Pl…