43 citations · 153 across the 13 of their papers we have counts for
15 papers
EP-FXT observations of the cool-core cluster Abell 478 out to R200: Thermodynamic properties and azimuthal asymmetry
J. X. Sun, Y. Chen, S. M. Jia +11
We use deep observations from the Einstein Probe Follow-up X-ray Telescope (EP-FXT) to investigate the gas distribution and thermodynamic properties of the cool-core galaxy cluster…
Widespread Detection of Aromatic and Aliphatic Emission in the Dual Quasar J0749+2255 at Cosmic Noon
C. E. Mentzer, Aigen Li, X. J. Yang
Based on JWST/MIRI integral field observations, we report a widespread detection of aromatic and aliphatic hydrocarbon emission at rest-frame 3.3 and 3.4 micron in SDSSJ074922.96+2…
Where Have All the Sulfur Atoms Gone? Polycyclic Aromatic Hydrocarbon as a Possible Sink for the Missing Sulfur in the Interstellar Medium. I. The C--S Band Strengths
X. J. Yang, Lijun Hua, Aigen Li
Despite its biogeneic and astrochemical importance, sulfur (S), the 10th most abundant element in the interstellar medium (ISM) with a total abundance of S/H~2.2E-5, largely remain…
Investigation into the origin of the soft excess in Ark 564 using principal component analysis
Ming Lyu, Zhenyan Fei, Guobao Zhang +1
We combined a principal component analysis (PCA) and spectroscopy to investigate the origin of the soft excess in narrow-line Seyfert 1 galaxy Ark 564 with XMM-Newton observations…
Polycyclic Aromatic Hydrocarbon Molecules and the 2175 Angstrom Interstellar Extinction Bump
Qi Lin, X. J. Yang, Aigen Li
The exact nature of the 2175 Angstrom extinction bump, the strongest spectroscopic absorption feature superimposed on the interstellar extinction curve, remains unknown ever since…
The 2175 Angstrom Interstellar Extinction Bump: Is the Wavelength Variable?
Qian Wang, X. J. Yang, Aigen Li
The most striking characteristics of the mysterious 2175 Angstrom extinction bump, the strongest spectroscopic absorption feature seen on the interstellar extinction curve, are the…
Deuterated Polycyclic Aromatic Hydrocarbons in the Interstellar Medium: The Aliphatic C--D Band Strengths
X. J. Yang, Aigen Li
Deuterium (D) was exclusively generated in the Big Bang and the standard Big Bang Nucleosynthesis (BBN) model predicts a primordial abundance of D/H~26ppm. As the Galaxy evolves, D…
Aliphatics and Aromatics in the Universe: The Pre-JWST Era
X. J. Yang, Aigen Li
The so-called "unidentified infrared emission" (UIE) features at 3.3, 6.2, 7.7, 8.6, and 11.3 micron ubiquitously seen in a wide variety of astrophysical regions are generally attr…
The harmonic component of the millihertz quasi-periodic oscillations in 4U 1636-53
Zhenyan Fei, Ming Lyu, Mariano Mendez +5
We studied the harmonics of the millihertz quasi-periodic oscillations (mHz QPOs) in the neutron-star low-mass X-ray binary 4U 1636-53 using the Rossi X-ray Timing Explorer observa…
Deuterated Polycyclic Aromatic Hydrocarbons in the Interstellar Medium: The C--D Band Strengths of Multi-Deuterated Species
X. J. Yang, Aigen Li, C. Y. He +1
Observationally, the interstellar gas-phase abundance of deuterium (D) is considerably depleted and the missing D atoms are often postulated to have been locked up into carbonaceou…
Deuterated Polycyclic Aromatic Hydrocarbons in the Interstellar Medium: The C--D Band Strengths of Mono-Deuterated Species
X. J. Yang, Aigen Li, R. Glaser
Deuterium (D) is one of the light elements created in the big bang. As the Galaxy evolves, the D/H abundance in the interstellar medium (ISM) decreases from its primordial value du…
Cr-K Emission Line as a Constraint on the Progenitor Properties of Supernova Remnants
X. J. Yang, H. Tsunemi, F. J. Lu +4
We perform a survey of the Cr, Mn and Fe-K emission lines in young supernova remnants (SNRs) with the Japanese X-ray astronomy satellite {\sl Suzaku}. The Cr and/or Mn emission lin…
The Single-degenerate Binary Origin of Tycho's Supernova as Traced by the Stripped Envelope of the Companion
F. J. Lu, Q. D. Wang, M. Y. Ge +4
We propose that a non-thermal X-ray arc inside the remnant of Tycho's supernova (SN) represents the interaction between the SN ejecta and the companion star's envelope lost in the…
X-ray emission from HESS J1731-347/SNR G353.6-0.7 and Central Compact Source XMMS J173203-344518
W. W. Tian, Z. Li, D. A. Leahy +4
We present new results of the HESS J1731-347/SNR G353.6-0.7 system from XMM-NEWTOM and Suzaku X-ray observations, and Delinha CO observations. We discover extended hard X-rays coin…
A Cr-K emission line survey in young supernova remnants with Chandra
X. J. Yang, H. Tsunemi, F. J. Lu +1
We performed a Cr-K emission line survey in young supernova remnants (SNRs) with the Chandra archival data. Our sample includes W49B, Cas A, Tycho and Kepler. We confirmed the exis…