Výsledky vyhledávání - "I. Psaradaki"

Akademický článek

Constraining the Number Density of the Accretion Disk Wind in Hercules X-1 Using Its Ionization Response to X-Ray Pulsations

Autor: P. Kosec, D. Rogantini, E. Kara, C. R. Canizares, A. C. Fabian, C. Pinto, I. Psaradaki, R. Staubert, D. J. Walton

Publikováno v: The Astrophysical Journal, Vol 972, Iss 1, p 32 (2024)

X-ray binaries are known to launch powerful accretion disk winds that can have a significant impact on the binary systems and their surroundings. To quantify the impact and determine the launching mechanisms of these outflows, we need to measure the

Externí odkaz: https://doaj.org/article/17a1c526fe434bedaaa8fc7402f5dbf7

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Akademický článek

Elemental Abundances in the Diffuse Interstellar Medium from Joint Far-ultraviolet and X-Ray Spectroscopy: Iron, Oxygen, Carbon, and Sulfur

Autor: I. Psaradaki, L. Corrales, J. Werk, A. G. Jensen, E. Costantini, M. Mehdipour, R. Cilley, N. Schulz, J. Kaastra, J. A. García, L. Valencic, T. Kallman, F. Paerels

Publikováno v: The Astronomical Journal, Vol 167, Iss 5, p 217 (2024)

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 the Chandra and XMM-N

Externí odkaz: https://doaj.org/article/eb6e73043c5e459d9c57aa12679a5868

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Akademický článek

Accretion Disk Wind of Hercules X-1 during the Short High State

Autor: P. Kosec, E. Kara, A. C. Fabian, C. Pinto, I. Psaradaki, D. Rogantini, R. Staubert, D. J. Walton

Publikováno v: The Astrophysical Journal, Vol 959, Iss 1, p 51 (2023)

Hercules X-1 is a nearly edge-on X-ray binary with a warped, precessing accretion disk, which manifests through a 35-day cycle of alternating High and Low flux states. This disk precession introduces a changing line of sight toward the X-ray source,

Externí odkaz: https://doaj.org/article/9edefa409e474408afb665b73c45c750

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Vertical wind structure in an X-ray binary revealed by a precessing accretion disk

Autor: P. Kosec, E. Kara, A. C. Fabian, F. Fürst, C. Pinto, I. Psaradaki, C. S. Reynolds, D. Rogantini, D. J. Walton, R. Ballhausen, C. Canizares, S. Dyda, R. Staubert, J. Wilms

The accretion of matter onto black holes and neutron stars often leads to the launching of outflows that can greatly affect the environments surrounding the compact object. In supermassive black holes, these outflows can even be powerful enough to di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16f3b69ee50746aa3858cea2d5fa5a10
http://arxiv.org/abs/2304.05490

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Akademický článek

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Oxygen and iron in interstellar dust: An X-ray investigation

Autor: I. Psaradaki, E. Costantini, D. Rogantini, M. Mehdipour, L. Corrales, S. T. Zeegers, F. de Groot, J. W. A. den Herder, H. Mutschke, S. Trasobares, C. P. de Vries, L. B. F. M. Waters

Publikováno v: Astronomy & Astrophysics, 670, 1-12
Astronomy & Astrophysics, 670, pp. 1-12

Understanding the chemistry of the interstellar medium (ISM) is fundamental for the comprehension of the Galactic and stellar evolution. X-rays provide an excellent way to study the dust chemical composition and crystallinity along different sight-li

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e204c406b7f024ca8112ea3e3b48a7f
https://doi.org/10.1051/0004-6361/202244110

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UV and X-ray observations of the neutron star LMXB EXO 0748–676 in its quiescent state

Autor: I. Psaradaki, Jon M. Miller, Nathalie Degenaar, Aastha S. Parikh, David Modiano, J. V. Hernández Santisteban, Rudy Wijnands, Elisa Costantini

Publikováno v: Monthly Notices of the Royal Astronomical Society, 501(1), 1453-1462. Oxford University Press

The accretion behaviour in low-mass X-ray binaries (LMXBs) at low luminosities, especially at 3500 km/s), which could indicate that it results from an outflow such as a pulsar wind. By studying several epochs of X-ray and near-UV data obtained with X

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::132304451c3e060998558ee323e2c8f9
https://doi.org/10.1093/mnras/staa3734

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The Long Stare at Hercules X-1. I. Emission Lines from the Outer Disk, the Magnetosphere Boundary, and the Accretion Curtain

Autor: P. Kosec, E. Kara, A. C. Fabian, F. Fürst, C. Pinto, I. Psaradaki, C. S. Reynolds, D. Rogantini, D. J. Walton, R. Ballhausen, C. Canizares, S. Dyda, R. Staubert, J. Wilms

Publikováno v: The Astrophysical Journal. 936:185

Hercules X-1 is a nearly edge-on accreting X-ray pulsar with a warped accretion disk, precessing with a period of about 35 days. The disk precession allows for unique and changing sightlines towards the X-ray source. To investigate the accretion flow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfa6e0a2501336810b56950a848935d7
https://doi.org/10.3847/1538-4357/ac897e

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Akademický článek

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Akademický článek

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