Zobrazeno 1 - 10
of 1 506
pro vyhledávání: '"Wilkins, D."'
Autor:
Wilkins, D. R., Poliszczuk, A., Schneider, B., Miller, E. D., Allen, S. W., Bautz, M., Chattopadhyay, T., Falcone, A. D., Foster, R., Grant, C. E., Herrmann, S., Kraft, R., Morris, R. G., Nulsen, P., Orel, P., Schellenberger, G.
Publikováno v:
Proc. SPIE, 2024, 13093-65
Bringing artificial intelligence (AI) alongside next-generation X-ray imaging detectors, including CCDs and DEPFET sensors, enhances their sensitivity to achieve many of the flagship science cases targeted by future X-ray observatories, based upon lo
Externí odkaz:
http://arxiv.org/abs/2407.16764
Autor:
Juráňová, A., Costantini, E., Kriss, G. A., Mehdipour, M., Brandt, W. N., Di Gesu, L., Fabian, A. C., Gallo, L., Giustini, M., Rogantini, D., Wilkins, D. R.
We present an analysis of the HST COS spectrum of IZw1 aiming to probe the absorbing medium associated with the active galactic nucleus (AGN). We fitted the emission spectrum and performed spectral analysis of the identified absorption features to de
Externí odkaz:
http://arxiv.org/abs/2404.10060
Autor:
Kammoun, E., Lohfink, A. M., Masterson, M., Wilkins, D. R., Zhao, X., Baloković, M., Boorman, P. G., Connors, R. M. T., Coppi, P., Fabian, A. C., García, J. A., Madsen, K. K., Cavero, N. Rodriguez, Sridhar, N., Stern, D., Tomsick, J., Wevers, T., Walton, D. J., Bianchi, S., Buchner, J., Civano, F., Lanzuisi, G., Mallick, L., Matt, G., Merloni, A., Nardini, E., Piotrowska, J. M., Ricci, C., Wong, K. -W., Zoghbi, A., Collaboration, the HEX-P
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:
http://arxiv.org/abs/2311.04679
Autor:
Boorman, P. G., Torres-Albà, N., Annuar, A., Marchesi, S., Pfeifle, R., Stern, D., Civano, F., Baloković, M., Buchner, J., Ricci, C., Alexander, D. M., Brandt, W. N., Brightman, M., Chen, C. T., Creech, S., Gandhi, P., García, J. A., Harrison, F., Hickox, R., Kammoun, E., LaMassa, S., Lanzuisi, G., Marcotulli, L., Madsen, K., Matt, G., Matzeu, G., Nardini, E., Piotrowska, J. M., Pizzetti, A., Puccetti, S., Sicilian, D., Silver, R., Walton, D. J., Wilkins, D. R., Zhao, X.
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:
http://arxiv.org/abs/2311.04949
Autor:
Piotrowska, J. M., García, J. A., Walton, D. J., Beckmann, R. S., Stern, D., Ballantyne, D. R., Wilkins, D. R., Bianchi, S., Boorman, P. G., Buchner, J., Chen, C. -T., Coppi, P., Dauser, T., Fabian, A. C., Kammoun, E., Madsen, K., Mallick, L., Matt, G., Matzeu, G., Nardini, E., Pizzetti, A., Puccetti, S., Ricci, C., Tombesi, F., Torres-Albà, N., Wong, K. -W., Collaboration, the HEX-P
Constraining the primary growth channel of supermassive black holes (SMBH) 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:
http://arxiv.org/abs/2311.04752
Autor:
Wilkins, D. R.
Spectral timing analyses based upon wavelet transforms provide a new means to study the variability of the X-ray emission from accreting systems, including AGN, stellar mass black holes and neutron stars, and can be used to trace the time variability
Externí odkaz:
http://arxiv.org/abs/2309.13107
Actively accreting supermassive black holes significantly impact the evolution of their host galaxies, truncating further star formation by expelling large fractions of gas with wide-angle outflows. The X-ray band is key to understanding how these bl
Externí odkaz:
http://arxiv.org/abs/2208.08457
Autor:
Wilkins, D. R., Allen, S. W., Miller, E. D., Bautz, M., Chattopadhyay, T., Foster, R., Grant, C. E., Hermann, S., Kraft, R., Morris, R. G., Nulsen, P., Schellenberger, G.
Publikováno v:
Proc. SPIE, 2022, 12181, 155
The sensitivity of astronomical X-ray detectors is limited by the instrumental background. The background is especially important when observing low surface brightness sources that are critical for many of the science cases targeted by future X-ray o
Externí odkaz:
http://arxiv.org/abs/2208.07906
Autor:
Mallick, L., Fabian, A. C., García, J. A., Tomsick, J. A., Parker, M. L., Dauser, T., Wilkins, D. R., De Marco, B., Steiner, J. F., Connors, R. M. T., Mastroserio, G., Markowitz, A. G., Pinto, C., Alston, W. N., Lohfink, A. M., Gandhi, P.
The standard alpha-disc model predicts an anti-correlation between the density of the inner accretion disc and the black hole mass times square of the accretion rate, as seen in higher mass ($M_{\rm BH}>10^{6} M_{\odot}$) active galactic nuclei (AGNs
Externí odkaz:
http://arxiv.org/abs/2203.04522
We report on X-ray flares that were observed from the active galactic nucleus I Zwicky 1 (I Zw 1) in 2020 January by the NuSTAR and XMM-Newton observatories. The X-ray spectrum is well-described by a model comprised of the continuum emission from the
Externí odkaz:
http://arxiv.org/abs/2202.06958