Zobrazeno 1 - 10
of 540
pro vyhledávání: '"Kallman, T"'
Autor:
Psaradaki, I., Corrales, L., Werk, J., Jensen, A. G., Costantini, E., Mehdipour, M., Cilley, R., Schulz, N., Kaastra, J., García, J. A., Valencic, L., Kallman, T., Paerels, F.
In this study, we investigate interstellar absorption lines along the line of sight toward the galactic low-mass X-ray binary Cygnus X-2. We combine absorption line data obtained from high-resolution X-ray spectra collected with Chandra and XMM-Newto
Externí odkaz:
http://arxiv.org/abs/2403.02664
Autor:
Marra, L., Brigitte, M., Cavero, N. Rodriguez, Chun, S., Steiner, J. F., Dovčiak, M., Nowak, M., Bianchi, S., Capitanio, F., Ingram, A., Matt, G., Muleri, F., Podgorný, J., Poutanen, J., Svoboda, J., Taverna, R., Ursini, F., Veledina, A., De Rosa, A., Garcia, J. A., Lutovinov, A. A., Mereminskiy, I. A., Farinelli, R., Gunji, S., Kaaret, P., Kallman, T., Krawczynski, H., Kan, Y., Hu, K., Marinucci, A., Mastroserio, G., Mikušincová, R., Parra, M., Petrucci, P. O., Ratheesh, A., Soffitta, P., Tombesi, F., Zane, S., Agudo, I., Antonelli, L. A., Bachetti, M., Baldini, L., Baumgartner, W. H., Bellazzini, R., Bongiorno, S. D., Bonino, R., Brez, A., Bucciantini, N., Castellano, S., Cavazzuti, E., Chen, C., Ciprini, S., Costa, E., Del Monte, E., Di Gesu, L., Di Lalla, N., Di Marco, A., Donnarumma, I., Doroshenko, V., Ehlert, S. R., Enoto, T., Evangelista, Y., Fabiani, S., Ferrazzoli, R., Hayashida, K., Heyl, J., Iwakiri, W., Jorstad, S. G., Karas, V., Kislat, F., Kitaguchi, T., Kolodziejczak, J. J., La Monaca, F., Latronico, L., Liodakis, I., Maldera, S., Manfreda, A., Marin, F., Marscher, A. P., Marshall, H. L., Massaro, F., Mitsuishi, I., Mizuno, T., Negro, M., Ng, C. Y., O'Dell, S. L., Omodei, N., Oppedisano, C., Papitto, A., Pavlov, G. G., Peirson, A. L., Perri, M., Pesce-Rollins, M., Pilia, M., Possenti, A., Puccetti, S., Ramsey, B. D., Rankin, J., Roberts, O. J., Romani, R. W., Sgro, C., Slane, P., Spandre, G., Swartz, D. A., Tamagawa, T., Tavecchio, F., Tawara, Y., Tennant, A. F., Thomas, N. E., Trois, A., Tsygankov, S. S., Turolla, R., Vink, J., Weisskopf, M. C., Wu, K., Xie, F.
We present the results of the first X-ray polarimetric observation of the low-mass X-ray binary 4U 1957+115, performed with the Imaging X-ray Polarimetry Explorer in May 2023. The binary system has been in a high-soft spectral state since its discove
Externí odkaz:
http://arxiv.org/abs/2310.11125
The problem of missing baryons in the local universe remains an open question. One propose alternative is that at low redshift missing baryons are in the form of the Warm Hot Intergalactic Medium (WHIM). In order to test this idea, we present a detai
Externí odkaz:
http://arxiv.org/abs/2303.01527
Autor:
Trueba, Nicolas, Miller, J. M., Fabian, A. C., Kaastra, J., Kallman, T., Lohfink, A., Ludlam, R. M., Proga, D., Raymond, J., Reynolds, C., Reynolds, M., Zoghbi, A.
Analyses of absorption from disk winds and atmospheres in accreting compact objects typically treat the central emitting regions in these systems as point sources relative to the absorber. This assumption breaks down if the absorbing gas is located w
Externí odkaz:
http://arxiv.org/abs/2111.04764
Autor:
Palmeri, P., Deprince, J., Bautista, M. A., Fritzsche, S., Garcia, J. A., Kallman, T. R., Mendoza, C., Quinet, P.
Publikováno v:
A&A 657, A61 (2022)
Aims. We calculate the plasma environment effects on the ionization potentials (IPs) and K-thresholds used in the modeling of K lines for all the ions belonging to the isonuclear sequences of abundant elements apart from oxygen and iron, namely: carb
Externí odkaz:
http://arxiv.org/abs/2110.09957
Autor:
Kallman, T., Bautista, M., Deprince, J., Garcia, J. A., Mendoza, C., Ogorzalek, A., Palmeri, P., Quinet, P.
Relativistically broadened and redshifted 6.4 -- 6.9 keV iron K lines are observed from many accretion powered objects, including X-ray binaries and active galactic nuclei (AGN). Existence of gas close to the central engine implies large radiation in
Externí odkaz:
http://arxiv.org/abs/2011.10603
Autor:
Trueba, Nicolas, Miller, J. M., Fabian, A. C., Kaastra, J., Kallman, T., Lohfink, A., Proga, D., Raymond, J., Reynolds, C., Reynolds, M., Zoghbi, A.
The very small accretion disks in ultra-compact X-ray binaries (UCXBs) are special laboratories in which to study disk accretion and outflows. We report on three sets of new (250 ks total) and archival (50 ks) Chandra/HETG observations of the "dippin
Externí odkaz:
http://arxiv.org/abs/2008.01083
Autor:
Miller, J. M., Zoghbi, A., Raymond, J., Balakrishnan, M., Brenneman, L., Cackett, E., Draghis, P., Fabian, A. C., Gallo, E., Kaastra, J., Kallman, T., Kammoun, E., Motta, S. E., Proga, D., Reynolds, M. T., Trueba, N.
We report on Chandra gratings spectra of the stellar-mass black hole GRS 1915+105 obtained during a novel, highly obscured state. As the source entered this state, a dense, massive accretion disk wind was detected through strong absorption lines. Pho
Externí odkaz:
http://arxiv.org/abs/2007.07005
Autor:
Balakrishnan, M., Miller, J. M., Trueba, N., Reynolds, M., Raymond, J., Proga, D., Fabian, A. C., Kallman, T., Kaastra, J.
Chandra obtained two High Energy Transmission Grating (HETG) spectra of the stellar-mass black hole GRO J1655-40 during its 2005 outburst, revealing a rich and complex disk wind. Soon after its launch, the Neil Gehrels Swift Observatory began monitor
Externí odkaz:
http://arxiv.org/abs/2003.10945
Autor:
Deprince, J., Bautista, M. A., Fritzsche, S., Garcia, J. A., Kallman, T. R., Mendoza, C., Palmeri, P., Quinet, P.
Publikováno v:
A&A 635, A70 (2020)
Aims. In the context of black-hole accretion disks, we aim to compute the plasma-environment effects on the atomic parameters used to model the decay of K-vacancy states in moderately charged iron ions, namely Fe ix - Fe xvi. Methods. We used the ful
Externí odkaz:
http://arxiv.org/abs/2001.11915