Author

MIT

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4 papers

X-ray scaling relations of early-type galaxies in IllustrisTNG and a new way of identifying backsplash objects

We investigate how feedback and environment shapes the X-ray scaling relations of early-type galaxies (ETGs), especially at the low-mass end. We select central-ETGs from the IllustrisTNG-100 box that have stellar masses…

Astrophysics of Galaxies · Physics 2023-03-29 Yunchong Wang , Mark Vogelsberger , Dong-Woo Kim , Josh Borrow , Aaron Smith , Lars Hernquist , Wenjie Lin , . , Stanford , MIT , Harvard , Columbia

Early-type galaxy density profiles from IllustrisTNG: III. Effects on outer kinematic structure

Early-type galaxies (ETGs) possess total density profiles close to isothermal, which can lead to non-Gaussian line-of-sight velocity dispersion (LOSVD) under anisotropic stellar orbits. However, recent observations of local ETGs in the…

Astrophysics of Galaxies · Physics 2022-05-31 Yunchong Wang , Shude Mao , Mark Vogelsberger , Volker Springel , Lars Hernquist , Risa Wechsler , . , Tsinghua , Stanford , MIT , MPA , Harvard , SLAC

NuSTAR Discovery of a cyclotron line in KS 1947+300

We present a spectral analysis of three simultaneous NuSTAR and Swift/XRT observations of the transient Be-neutron star binary KS 1947+300 taken during its outburst in 2013/2014. These broad-band observations were supported by Swift/XRT…

High Energy Astrophysical Phenomena · Physics 2019-08-19 Felix Fuerst , Katja Pottschmidt , Joern Wilms , Jamie Kennea , Matteo Bachetti , Eric Bellm , Steven E. Boggs , Deepto Chakrabarty , Finn E. Christensen , William W. Craig , Charles J. Hailey , Fiona Harrison , Daniel Stern1 , John A. Tomsick , Dominic J. Walton , William Zhang , Cahill Center , Caltech , USA , CSST , UMBC , USA , CRESST , GSFC , USA , Remeis-Observatory , ECAP , Germany , Penn State University , USA , Universite de Toulouse , France , CNRS , IRAP , France , SSL , UCB , USA , Kavli Institute for Astrophysics , MIT , USA , DTU Space , TU Denmark , Denmark , Columbia Astrophysics Lab , Columbia University , USA , JPL , USA , GSFC , ASD , USA

Infrared Renormalons and Power Corrections in Deep-Inelastic Sum Rules

Infrared renormalons and $1/Q^2$ power corrections in deep-inelastic sum rules are studied. The renormalization of operators with power divergence are discussed. The higher-twist terms in the operator product expansion are shown to account…

High Energy Physics - Phenomenology · Physics 2015-06-25 Xiangdong Ji , MIT