30 citations · 220 across the 23 of their papers we have counts for
24 papers
Chandra and XMM-Newton X-ray Study on the Core-collapse Supernova Remnant N63A in an H II Region
Hanxiao Chen, Yang Chen, Lei Sun +1
N63A is one of the brightest supernova remnants (SNRs) in the Large Magellanic Cloud and provides an excellent laboratory for studying SNR evolution in an H II region. We present a…
Evolution of X-ray Gas in SN 1987A from 2007 to 2021: Ring Fading and Ejecta Brightening Unveiled through Differential Emission Measure Analysis
Lei Sun, Salvatore Orlando, Emanuele Greco +4
As the nearest supernova (SN) observed since Kepler's SN of 1604, SN 1987A provides an unprecedented opportunity to study in detail the early evolution of supernova remnants (SNRs)…
Unusual X-ray Oxygen Line Ratios of SN 1987A Arising From the Absorption of Galactic Hot Interstellar Medium
Lei Sun, Salvatore Orlando, Emanuele Greco +5
Recent high-resolution X-ray spectroscopic studies have revealed unusual oxygen line ratios, such as the high O VII forbidden-to-resonance ratio, in several supernova remnants. Whi…
A Monte-Carlo Simulation on Resonant Scattering of X-ray Line Emission in Supernova Remnants
Yiping Li, Gao-Yuan Zhang, Yang Chen +2
Resonant scattering (RS) of X-ray line emission in supernova remnants (SNRs) may modify the observed line profiles and fluxes and has potential impact on estimating the physical pr…
Thermal X-ray Emission in the Western Half of the LMC Superbubble 30 Dor C
Yi-Heng Chi, Han-Xiao Chen, Yang Chen +4
While 30 Dor C is a unique superbubble in the Large Magellanic Cloud for its luminous non-thermal X-ray emission, the thermal X-ray emission it emanates has not yet been thoroughly…
Typing supernova remnant G352.70.1 using XMM-Newton X-ray observations
Ling-Xiao Dang, Ping Zhou, Lei Sun +4
G352.70.1 is a mixed-morphology (MM) supernova remnant (SNR) with multiple radio arcs and has a disputed supernova origin. We conducted a spatially resolved spectroscopic study…
Scientific Objectives of the Hot Universe Baryon Surveyor (HUBS) Mission
Joel Bregman, Renyue Cen, Yang Chen +51
The Hot Universe Baryon Surveyor (HUBS) is a proposed space-based X-ray telescope for detecting X-ray emissions from the hot gas content in our universe. With its unprecedented spa…
Additional evidence for a pulsar wind nebula in the heart of SN 1987A from multi-epoch X-ray data and MHD modeling
Emanuele Greco, Marco Miceli, Salvatore Orlando +9
Since the day of its explosion, supernova (SN) 1987A has been closely monitored to study its evolution and to detect its central compact relic. In fact, the formation of a neutron…
Unusually high HCO+/CO ratios in and outside supernova remnant W49B
Ping Zhou, Gao-Yuan Zhang, Xin Zhou +10
Galactic supernova remnants (SNRs) and their environments provide the nearest laboratories to study SN feedback. We performed molecular observations toward SNR W49B, the most lumin…
Combined dark matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS
Celine Armand, Eric Charles, Mattia di Mauro +13
Cosmological and astrophysical observations suggest that 85\% of the total matter of the Universe is made of Dark Matter (DM). However, its nature remains one of the most challengi…
The young massive stellar cluster Westerlund 1 in rays as seen with H.E.S.S
Lars Mohrmann, Andreas Specovius, Romed Rauth +2
Massive stellar clusters have recently been hypothesised as candidates for the acceleration of hadronic cosmic rays up to PeV energies. Previously, the H.E.S.S. Collaboration has r…
Science verification of the new FlashCam-based camera in the 28m telescope of H.E.S.S
Gerd Pühlhofer, Konrad Bernlöhr, Baiyang Bi +13
In October 2019 the central 28m telescope of the H.E.S.S. experiment has been upgraded with a new camera. The camera is based on the FlashCam design which has been developed in vie…
Detection of extended TeV emission around the Geminga pulsar with H.E.S.S
A. M. W. Mitchell, S. Caroff, J. Hinton +1
Highly extended gamma-ray emission around the Geminga pulsar was discovered by Milagro and verified by HAWC. Despite many observations with Imaging Atmospheric Cherenkov Telescopes…
Detection of new Extreme BL Lac objects with H.E.S.S. and Swift XRT
Mathieu de Bony de Lavergne, Tomas Bylund, Manuel Meyer +2
Extreme high synchrotron peaked blazars (EHBLs) are amongst the most powerful accelerators found in nature. Usually the synchrotron peak frequency of an EHBL is above Hz…
Astronomy outreach in Namibia: H.E.S.S. and beyond
Hannah Dalgleish, Heike Prokoph, Sylvia Zhu +6
Astronomy plays a major role in the scientific landscape of Namibia. Because of its excellent sky conditions, Namibia is home to ground-based observatories like the High Energy Spe…
Evidence of 100 TeV -ray emission from HESS J1702-420: A new PeVatron candidate
H. Abdalla, F. Aharonian, F. Ait Benkhali +232
The identification of PeVatrons, hadronic particle accelerators reaching the knee of the cosmic ray spectrum (few eV), is crucial to understand the origin of cosmic rays…
The Post-impact Evolution of the X-ray Emitting Gas in SNR 1987A Viewed by XMM-Newton
Lei Sun, Jacco Vink, Yang Chen +4
Since 1996 the blast wave driven by SN 1987A has been interacting with the dense circumstellar material, which provides us with a unique opportunity to study the early evolution of…
An XMM-Newton X-ray View of Supernova Remnant W49B: Revisiting its Recombining Plasmas and Progenitor Type
Lei Sun, Yang Chen
We present a comprehensive X-ray spectroscopy and imaging study of supernova remnant W49B using archival XMM-Newton observations. The overionization state of the shocked ejecta in…
Combined Dark Matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, HESS, MAGIC and VERITAS
Louise Oakes, Celine Armand, Eric Charles +13
The search for Dark Matter (DM) has great potential to reveal physics beyond the Standard Model. As such, searches for evidence of DM particles are being carried out using a wide r…
Spatially Resolved X-ray Spectroscopy of Kepler's Supernova Remnant: Distinct Properties of the Circumstellar Medium and the Ejecta
Lei Sun, Yang Chen
Kepler's supernova remnant (SNR) is believed to result from a Type Ia supernova, but be interacting with dense circumstellar material (CSM), which makes its progenitor system a mys…
NuSTAR Detection of a Hard X-ray Source in the Supernova Remnant - Molecular Cloud Interaction Site of IC 443
Shuo Zhang, Xiaping Tang, Xiao Zhang +10
We report on a broadband study of a complex X-ray source (1SAX J0618.0+2227) associated with the interaction site of the supernova remnant (SNR) IC 443 and ambient molecular cloud…
Reconstructing the galaxy redshift distribution from angular cross power spectra
L. Sun, H. Zhan, C. Tao
The control of photometric redshift (photo-) errors is a crucial and challenging task for precision weak lensing cosmology. The spacial cross-correlations (equivalently, the ang…
Constraining Cosmological Parameters with Observational Data Including Weak Lensing Effects
Hong Li, Jie Liu, Jun-Qing Xia +5
In this paper, we study the cosmological implications of the 100 square degree Weak Lensing survey (the CFHTLS-Wide, RCS, VIRMOS-DESCART and GaBoDS surveys). We combine these weak…
Catastrophic Photo-z Errors and the Dark Energy Parameter Estimates with Cosmic Shear
L. Sun, Z. -H. Fan, C. Tao +3
We study the impact of catastrophic errors occurring in the photometric redshifts of galaxies on cosmological parameter estimates with cosmic shear tomography. We consider a fiduci…