197 citations · 1.2k across the 36 of their papers we have counts for
35 papers
Structual Study of Galactic Hot Gas toward Markarian 421 from X-Ray Absorption and Emission Lines
Kazuhiro Sakai, Yangsen Yao, Kazuhisa Mitsuda +4
We present a structural study of the hot ISM in the Galactic halo along the sight line toward the bright active galactic nucleus Mkn 421. The OVII and OVIII absorption lines were m…
Wavelength Measurements of K Transitions of Oxygen, Neon, and Magnesium with X-ray Absorption Lines
Jin-Yuan Liao, Shuang-Nan Zhang, Yangsen Yao
Accurate atomic transition data are important in many astronomical research areas especially in line spectroscopy study. Whereas transition data of He-like and H-like ions (i.e., i…
XMM-Newton/RGS Detection of the Missing Interstellar OVII Kalpha Absorption Line in the Spectrum of Cyg X-2
Samuel H. C. Cabot, Q. Daniel Wang, Yangsen Yao
The hot interstellar medium is an important part of the Galactic ecosystem and can be effectively characterized through X-ray absorption line spectroscopy. However, in a study of t…
Comments on "A huge reservoir of ionized gas around the Milky Way: accounting for the missing mass?" (2012 ApJL, 756, 8) and "The warm-hot gaseous halo of the Milky Way" (arXiv1211.3137)
Q. Daniel Wang, Yangsen Yao
The two papers referred to in the title, claiming the detection of a large-scale massive hot gaseous halo around the Galaxy, have generated a lot of confusion and unwarranted excit…
Measuring the black hole masses in accreting X-ray binaries by detecting the Doppler orbital motion of their accretion disk wind absorption lines
Shuang-Nan Zhang, Jinyuan Liao, Yangsen Yao
So far essentially all black hole masses in X-ray binaries have been obtained by observing the companion star's velocity and light curves as functions of the orbital phase. However…
Detecting the warm-hot intergalactic medium through X-ray absorption lines
Yangsen Yao, J. Michael Shull, Q. Daniel Wang +1
The warm-hot intergalactic medium (WHIM) at temperatures 1E5-1E7 K is believed to contain 30-50% of the baryons in the local universe. However, all current X-ray detections of the…