Zobrazeno 1 - 10
of 44
pro vyhledávání: '"P G Boorman"'
Autor:
Ryan W. Pfeifle, Peter G. Boorman, Kimberly A. Weaver, Johannes Buchner, Francesca Civano, Kristin Madsen, Daniel Stern, Núria Torres-Albà, Emanuele Nardini, Claudio Ricci, Stefano Marchesi, D. R. Ballantyne, Dominic Sicilian, Chien-Ting Chen, Elias Kammoun, Ryan C. Hickox, Javier A. García, Labani Mallick
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
A fundamental goal of modern-day astrophysics is to understand the connection between supermassive black hole (SMBH) growth and galaxy evolution. Merging galaxies offer one of the most dramatic channels for galaxy evolution known, capable of driving
Externí odkaz:
https://doaj.org/article/143e915acf0942939c5de988f494af30
Autor:
P. G. Boorman, N. Torres-Albà, A. Annuar, S. Marchesi, R. W. Pfeifle, D. Stern, F. Civano, M. Baloković, J. Buchner, C. Ricci, D. M. Alexander, W. N. Brandt, M. Brightman, C. T. Chen, S. Creech, P. Gandhi, J. A. García, F. Harrison, R. Hickox, E. Kammoun, S. LaMassa, G. Lanzuisi, L. Marcotulli, K. Madsen, G. Matt, G. Matzeu, E. Nardini, J. M. Piotrowska, A. Pizzetti, S. Puccetti, D. Sicilian, R. Silver, D. J. Walton, D. R. Wilkins, X. Zhao, The HEX-P Collaboration
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Ever since the discovery of the first active galactic nuclei (AGN), substantial observational and theoretical effort has been invested into understanding how massive black holes have evolved across cosmic time. Circum-nuclear obscuration is now estab
Externí odkaz:
https://doaj.org/article/06e8a41e09e4449b99d01c68c15ce62e
Autor:
J. M. Piotrowska, J. A. García, D. J. Walton, R. S. Beckmann, D. Stern, D. R. Ballantyne, D. R. Wilkins, S. Bianchi, P. G. Boorman, J. Buchner, C.-T. Chen, P. Coppi, T. Dauser, A. C. Fabian, E. Kammoun, K. Madsen, L. Mallick, G. Matt, G. Matzeu, E. Nardini, A. Pizzetti, S. Puccetti, C. Ricci, F. Tombesi, N. Torres-Albà, K.-W. Wong
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Constraining the primary growth channel of supermassive black holes (SMBHs) remains one the most actively debated questions in the context of cosmological structure formation. Owing to the expected connection between SMBH spin parameter evolution and
Externí odkaz:
https://doaj.org/article/c254067cf45646e59c1e4ed6cdd384c6
Autor:
F. Civano, X. Zhao, P. G. Boorman, S. Marchesi, T. Ananna, S. Creech, C.-T. Chen, R. C. Hickox, D. Stern, K. Madsen, J. A. García, R. Silver, J. Aird, D. M. Alexander, M. Baloković, W. N. Brandt, J. Buchner, P. Gandhi, E. Kammoun, S. LaMassa, G. Lanzuisi, A. Merloni, A. Moretti, K. Nandra, E. Nardini, A. Pizzetti, S. Puccetti, R. W. Pfeifle, C. Ricci, D. Spiga, N. Torres-Albà
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Since the discovery of the cosmic X-ray background (CXB), astronomers have strived to understand the accreting supermassive black holes (SMBHs) contributing to its peak in the 10–40 keV band. Existing soft X-ray telescopes could study this populati
Externí odkaz:
https://doaj.org/article/94dd8252c17945e09edeaabcce5a31d1
Autor:
Elias Kammoun, Anne M. Lohfink, Megan Masterson, Dan R. Wilkins, Xiurui Zhao, Mislav Balokovic, Peter G. Boorman, Riley Connors, Paolo Coppi, Andrew Fabian, Javier A. García, Kristin K. Madsen, Nicole Rodriguez Cavero, Navin Sridhar, Daniel Stern, John Tomsick, Thomas Wevers, Dominic J. Walton, Stefano Bianchi, Johannes Buchner, Francesca M. Civano, Giorgio Lanzuisi, Labani Mallick, Giorgio Matt, Andrea Merloni, Emanuele Nardini, Joanna M. Piotrowska, Claudio Ricci, Ka-Wah Wong, Abderahmen Zoghbi
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2024)
The hard X-ray emission in active galactic nuclei (AGN) and black hole X-ray binaries is thought to be produced by a hot cloud of electrons referred to as the corona. This emission, commonly described by a power law with a high-energy cutoff, is sugg
Externí odkaz:
https://doaj.org/article/89d4444f0ddb4266a2823787d2cadb21
Autor:
Peter G. Boorman, Daniel Stern, Roberto J. Assef, Abhijeet Borkar, Murray Brightman, Johannes Buchner, Chien-Ting Chen, Hannah P. Earnshaw, Fiona A. Harrison, Gabriele A. Matzeu, Ryan W. Pfeifle, Claudio Ricci, Jiří Svoboda, Núria Torres-Albà, Ingyin Zaw
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 2, p 230 (2024)
Recent models suggest approximately half of all accreting supermassive black holes (SMBHs; M _BH ≳ 10 ^5 M _⊙ ) are expected to undergo intense growth phases behind Compton-thick ( N _H > 1.5 × 10 ^24 cm ^−2 ) veils of obscuring gas. However,
Externí odkaz:
https://doaj.org/article/26b6e42f78434cc0886de80fee9ae245
Autor:
Xiurui Zhao, Stefano Marchesi, Marco Ajello, Francesca Civano, Roberto Gilli, Giorgio Lanzuisi, Iván E. López, Peter G. Boorman, Ross Silver, Nuria Torres-Albà, Andrealuna Pizzetti
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 24 (2024)
We present a comprehensive X-ray analysis and spectral energy distribution (SED) fitting of WISEA J171419.96+602724.6, an extremely luminous type 2 quasar at z = 2.99. The source was suggested as a candidate Compton-thick (column density N _H > 1.5×
Externí odkaz:
https://doaj.org/article/5223decd628c4c798f345804af5df8f7
Autor:
Claire L. Greenwell, Lizelke Klindt, George B. Lansbury, David J. Rosario, David M. Alexander, James Aird, Daniel Stern, Karl Forster, Michael J. Koss, Franz E. Bauer, Claudio Ricci, John Tomsick, William N. Brandt, Thomas Connor, Peter G. Boorman, Adlyka Annuar, David R. Ballantyne, Chien-Ting Chen, Francesca Civano, Andrea Comastri, Victoria A. Fawcett, Francesca M. Fornasini, Poshak Gandhi, Fiona Harrison, Marianne Heida, Ryan Hickox, Elias S. Kammoun, Lauranne Lanz, Stefano Marchesi, Gaël Noirot, Encarni Romero-Colmenero, Ezequiel Treister, C. Megan Urry, Petri Väisänen, Brian van Soelen
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 273, Iss 2, p 20 (2024)
We present a catalog of hard X-ray serendipitous sources detected in the first 80 months of observations by the Nuclear Spectroscopic Telescope Array (NuSTAR). The NuSTAR serendipitous survey 80 month (NSS80) catalog has an unprecedented ∼62 Ms of
Externí odkaz:
https://doaj.org/article/3f0dcc6f07464165b4b50be77a6d5327
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 116 (2024)
X-ray spectroscopy of heavily obscured active galactic nuclei (AGN) offers a unique opportunity to study the circumnuclear environment of accreting supermassive black holes. However, individual models describing the obscurer have unique parameter spa
Externí odkaz:
https://doaj.org/article/ef16d1d0c1dc4a408668936f647b76a8
Autor:
M. T. Leist, C. Packham, D. J. V. Rosario, D. A. Hope, A. Alonso-Herrero, E. K. S. Hicks, S. Hönig, L. Zhang, R. Davies, T. Díaz-Santos, O. González-Martín, E. Bellocchi, P. G. Boorman, F. Combes, I. García-Bernete, S. García-Burillo, B. García-Lorenzo, H. Haidar, K. Ichikawa, M. Imanishi, S. M. Jefferies, Á. Labiano, N. A. Levenson, R. Nikutta, M. Pereira-Santaella, C. Ramos Almeida, C. Ricci, D. Rigopoulou, W. Schaefer, M. Stalevski, M. J. Ward, L. Fuller, T. Izumi, D. Rouan, T. Shimizu
Publikováno v:
The Astronomical Journal, Vol 167, Iss 3, p 96 (2024)
The superb image quality, stability, and sensitivity of JWST permit deconvolution techniques to be pursued with a fidelity unavailable to ground-based observations. We present an assessment of several deconvolution approaches to improve image quality
Externí odkaz:
https://doaj.org/article/b67ef29a56634779b1014dac2c621a2c