Zobrazeno 1 - 10
of 4 441
pro vyhledávání: '"Fabian, A C"'
The radiative cooling time of hot gas in the cool cores of many galaxy clusters and massive elliptical galaxies drops in the centre to below 100 million years. The mass cooling rates inferred from simple modelling of X-ray observations of these objec
Externí odkaz:
http://arxiv.org/abs/2411.03864
Autor:
Fabian, A. C., Ferland, G. J., Sanders, J. S., Russell, H. R., McNamara, B. R., Pinto, C., Hlavacek-Larrondo, J., Walker, S. A., Ivey, L. R., McDonald, M.
Cooling flows are common in galaxy clusters which have cool cores. The soft X-ray emission below 1 keV from the flows is mostly absorbed by cold dusty gas within the central cooling sites. Further evidence for this process is presented here through a
Externí odkaz:
http://arxiv.org/abs/2410.10675
Autor:
Guan, J., Ma, R. C., Tao, L., Fabian, A. C., Tomsick, J. A., Zhang, S. N., Zhang, L., Qu, J. L., Zhang, S.
We present a broadband spectral analysis of the soft-intermediate and soft states using \textit{Insight}-HXMT observations of the black hole binary MAXI J1348--630 during its outburst in 2019. We employ a combination of reflection and continuum fitti
Externí odkaz:
http://arxiv.org/abs/2409.19544
Autor:
Walton, D. J., Bachetti, M., Kosec, P., Furst, F., Pinto, C., Roberts, T. P., Soria, R., Stern, D., Alston, W. N., Brightman, M., Earnshaw, H. P., Fabian, A. C., Harrison, F. A., Middleton, M. J., Sathyaprakash, R.
We present a series of five new broadband X-ray observations of the ultraluminous X-ray source Holmberg IX X-1, performed by $XMM$-$Newton$ and $NuSTAR$ in coordination. The first three of these show high soft X-ray fluxes but a near total collapse o
Externí odkaz:
http://arxiv.org/abs/2409.12241
Broad absorption line (BAL) outflows are commonly detected in active galactic nuclei (AGN), but their driving mechanism remains poorly constrained. Here we investigate whether radiation pressure on dust can adequately explain the BAL phenomenon obser
Externí odkaz:
http://arxiv.org/abs/2409.03842
Autor:
Nicholl, M., Pasham, D. R., Mummery, A., Guolo, M., Gendreau, K., Dewangan, G. C., Ferrara, E. C., Remillard, R., Bonnerot, C., Chakraborty, J., Hajela, A., Dhillon, V. S., Gillan, A. F., Greenwood, J., Huber, M. E., Janiuk, A., Salvesen, G., van Velzen, S., Aamer, A., Alexander, K. D., Angus, C. R., Arzoumanian, Z., Auchettl, K., Berger, E., de Boer, T., Cendes, Y., Chambers, K. C., Chen, T. -W., Chornock, R., Fulton, M. D., Gao, H., Gillanders, J. H., Gomez, S., Gompertz, B. P., Fabian, A. C., Herman, J., Ingram, A., Kara, E., Laskar, T., Lawrence, A., Lin, C. -C., Lowe, T. B., Magnier, E. A., Margutti, R., McGee, S. L., Minguez, P., Moore, T., Nathan, E., Oates, S. R., Patra, K. C., Ramsden, P., Ravi, V., Ridley, E. J., Sheng, X., Smartt, S. J., Smith, K. W., Srivastav, S., Stein, R., Stevance, H. F., Turner, S. G. D., Wainscoat, R. J., Weston, J., Wevers, T., Young, D. R.
Quasi-periodic Eruptions (QPEs) are luminous bursts of soft X-rays from the nuclei of galaxies, repeating on timescales of hours to weeks. The mechanism behind these rare systems is uncertain, but most theories involve accretion disks around supermas
Externí odkaz:
http://arxiv.org/abs/2409.02181
Autor:
Madathil-Pottayil, A., Walton, D. J., García, Javier, Miller, Jon, Gallo, Luigi C., Ricci, C., Reynolds, Mark T., Stern, D., Dauser, T., Jiang, Jiachen, Alston, William, Fabian, A. C., Hardcastle, M. J., Kosec, Peter, Nardini, Emanuele, Reynolds, Christopher S.
'Bare' active galactic nuclei (AGN) are a subclass of Type 1 AGN that show little or no intrinsic absorption. They offer an unobscured view of the central regions of the AGN and therefore serve as ideal targets to study the relativistic reflection fe
Externí odkaz:
http://arxiv.org/abs/2409.01395
Autor:
Juodžbalis, Ignas, Ji, Xihan, Maiolino, Roberto, D'Eugenio, Francesco, Scholtz, Jan, Risaliti, Guido, Fabian, Andrew C., Mazzolari, Giovanni, Gilli, Roberto, Prandoni, Isabella, Arribas, Santiago, Bunker, Andrew J., Carniani, Stefano, Charlot, Stéphane, Curtis-Lake, Emma, de Graaff, Anna, Hainline, Kevin, Parlanti, Eleonora, Perna, Michele, Pérez-González, Pablo G., Robertson, Brant, Tacchella, Sandro, Übler, Hannah, Williams, Christina C., Willott, Chris, Witstok, Joris
JWST has discovered a large population of Active Galactic Nuclei (AGN) at high redshift. Many of these newly discovered AGN have broad permitted lines (typically H$\alpha$), but are extremely weak in the X-rays. Here we present the NIRSpec spectrum o
Externí odkaz:
http://arxiv.org/abs/2407.08643
High resolution X-ray spectra reveal hidden cooling flows depositing cold gas at the centres of massive nearby early-type galaxies with little sign of normal star formation. Optical observations are revealing that a bottom-heavy Initial Mass Function
Externí odkaz:
http://arxiv.org/abs/2405.01865
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