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- University of PisaIT369 papers
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- Centre National de la Recherche ScientifiqueFR299 papers
- University of PaduaIT297 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT266 papers
- Johns Hopkins UniversityUS265 papers
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- Sapienza University of RomeIT254 papers
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41 papers · 1 filter
X-ray Unveiling Events in a z~1.6 Active Galactic Nucleus in the 7 Ms Chandra Deep Field-South
Li-Ming Yu, Bin Luo, William N. Brandt +14
We investigate the extreme X-ray variability of a z = 1.608 active galactic nucleus in the 7 Ms Chandra Deep Field-South (XID 403), which showed two significant X-ray brightening e…
The universal shape of the X-ray variability power spectrum of AGN up to
M. Paolillo, I. E. Papadakis, W. N. Brandt +12
We study the ensemble X-ray variability properties of Active Galactic Nuclei (AGN) over a large range of timescales (20 ks 14 yrs), redshift (), lu…
The ionizing and heating power of ultraluminous X-ray sources under the geometrical beaming model
K. Kovlakas, T. Fragos, D. Schaerer +1
While there is now a consensus that X-ray binaries (XRBs) are the dominant X-ray sources in the early Universe and play a significant role during the epoch of heating of the interg…
The Stellar Age Dependence of X-ray Emission from Normal Star-Forming Galaxies in the GOODS Fields
Woodrow Gilbertson, Bret Lehmer, Keith Doore +11
The Chandra Deep Field-South and North surveys (CDFs) provide unique windows into the cosmic history of X-ray emission from normal (non-active) galaxies. Scaling relations of norma…
Progenitors of Long-Duration Gamma-ray Bursts
Arpita Roy
We review the current scenario of long-duration Gamma-ray burst (LGRB) progenitors, and in addition, present models of massive stars for a mass range of $10\text{--}150 \, \mathrm{…
Radio signals from early direct collapse black holes
B. Yue, A. Ferrara
We explore the possibility to detect the continuum radio signal from direct collapse black holes (DCBHs) by upcoming radio telescopes such as the SKA and ngVLA, assuming that after…