Zobrazeno 1 - 10
of 512
pro vyhledávání: '"R. Ballantyne"'
Autor:
G. Bagnasco, M. Marzullo, C. Cattaneo, L. Biehler-Gomez, D. Mazzarelli, V. Ricciardi, W. Müller, A. Coppa, R. McLaughlin, L. Motta, O. Prato, F. Schmidt, F. Gaveriaux, G. B. Marras, M. A. Millet, R. Madgwick, R. Ballantyne, C.A. Makarewicz, A. Trentacoste, P. Reimer, V. Mattiangeli, D. G. Bradley, C. Malone, C. Esposito, E. M. Breslin, S. Stoddart
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-14 (2024)
Abstract Etruria contained one of the great early urban civilisations in the Italian peninsula during the first millennium BC, much studied from a cultural, humanities-based, perspective, but relatively little with scientific data, and rarely in comb
Externí odkaz:
https://doaj.org/article/6ea9aca567814a95b596dd9b03ce34a4
Autor:
X Xiang, D R Ballantyne, S Bianchi, A De Rosa, G Matt, R Middei, P-O Petrucci, A Różańska, F Ursini
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 515:353-368
The X-ray spectra of active galactic nuclei (AGNs) often exhibit an excess of emission above the primary power-law at energies
17 pages, 11 figures, accepted by MNRAS. The reXcor table models can be downloaded here: https://github.com/HEASARC/xs
17 pages, 11 figures, accepted by MNRAS. The reXcor table models can be downloaded here: https://github.com/HEASARC/xs
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2020, ⟨10.1093/mnras/staa3137⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, ⟨10.1093/mnras/staa3137⟩
Monthly Notices of the Royal Astronomical Society, 2020, ⟨10.1093/mnras/staa3137⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, ⟨10.1093/mnras/staa3137⟩
Understanding the persistent emission is crucial for studying type I X-ray bursts, which provide insight into neutron star properties. Although accretion disc coronae appear to be common in many accreting systems, their fundamental properties remain
Autor:
Tolga Güver, Z. Funda Bostancı, Tuğba Boztepe, Ersin Göğüş, Peter Bult, Unnati Kashyap, Manoneeta Chakraborty, David R. Ballantyne, R. M. Ludlam, C. Malacaria, Gaurava K. Jaisawal, Tod E. Strohmayer, Sebastien Guillot, Mason Ng
Publikováno v:
Astrophys.J.
Astrophys.J., 2022, 935 (2), pp.154. ⟨10.3847/1538-4357/ac8106⟩
Güver, T, Bostancı, Z F, Boztepe, T, Göğüş, E, Bult, P, Kashyap, U, Chakraborty, M, Ballantyne, D R, Ludlam, R M, Malacaria, C, Jaisawal, G K, Strohmayer, T E, Guillot, S & Ng, M 2022, ' Burst–Disk Interaction in 4U 1636–536 as Observed by NICER ', Astrophysical Journal, vol. 935, no. 2, 154 . https://doi.org/10.3847/1538-4357/ac8106
Astrophys.J., 2022, 935 (2), pp.154. ⟨10.3847/1538-4357/ac8106⟩
Güver, T, Bostancı, Z F, Boztepe, T, Göğüş, E, Bult, P, Kashyap, U, Chakraborty, M, Ballantyne, D R, Ludlam, R M, Malacaria, C, Jaisawal, G K, Strohmayer, T E, Guillot, S & Ng, M 2022, ' Burst–Disk Interaction in 4U 1636–536 as Observed by NICER ', Astrophysical Journal, vol. 935, no. 2, 154 . https://doi.org/10.3847/1538-4357/ac8106
We present the detection of 51 thermonuclear X-ray bursts observed from 4U 1636-536 by the Neutron Star Interior Composition Explorer (NICER) over the course of a three year monitoring campaign. We performed time resolved spectroscopy for 40 of these
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0e2d1356e8d4a85bcfeb8315cac95d5
Autor:
David R. Ballantyne, X Xiang
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 496:4255-4265
Warm coronae, thick ($\tau_{\mathrm{T}}\approx 10$-$20$, where $\tau_{\mathrm{T}}$ is the Thomson depth) Comptonizing regions with temperatures of $\sim 1$ keV, are proposed to exist at the surfaces of accretion discs in active galactic nuclei (AGNs)
Publikováno v:
Nature Astronomy. 4:541-546
Careful observations of X-ray spectra during type I X-ray bursts have hinted at changes occurring in the inner regions of the accretion disks around the neutron-star component of the binary system. Here, we perform a set of numerical experiments stud
Autor:
Jeroen Homan, Keith C. Gendreau, Diego Altamirano, Zaven Arzoumanian, Christian Malacaria, Jon M. Miller, Michael Parker, Gaurava K. Jaisawal, Jérôme Chenevez, David R. Ballantyne, Peter Bult, Tod E. Strohmayer, Andrew C. Fabian
Publikováno v:
Bult, P, Altamirano, D, Arzoumanian, Z, Ballantyne, D R, Chenevez, J, Fabian, A C, Gendreau, K C, Homan, J, Jaisawal, G K, Malacaria, C, Miller, J M, Parker, M L & Strohmayer, T E 2021, ' On the Impact of an Intermediate Duration X-Ray Burst on the Accretion Environment in IGR J17062-6143 ', Astrophysical Journal Supplement Series, vol. 920, no. 1, 59 . https://doi.org/10.3847/1538-4357/ac18c4
We report on a spectroscopic analysis of the X-ray emission from IGR J17062-6143 in the aftermath of its June 2020 intermediate duration Type I X-ray burst. Using the Neutron Star Interior Composition Explorer, we started observing the source three h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e470a31e989c7b04b1dededd85719ee5
http://arxiv.org/abs/2107.13543
http://arxiv.org/abs/2107.13543
Publikováno v:
The Astrophysical Journal. 933:104
We evaluate the cosmological coalescence and detection rates for massive black hole (MBH) binaries targeted by the gravitational wave observatory Laser Interferometer Space Antenna (LISA). Our calculation starts with a population of gravitationally u
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Autor:
H. Gregory, Yvonne Robb, Maria Eugenicos, Maria Elena Farrugia, Catherine McWilliam, Cheryl Longman, M.J. Hamilton, R. Ballantyne, R.K.H. Petty
Publikováno v:
Neuromuscular Disorders. 29:562-566
Faecal incontinence is recognised as a feature of myotonic dystrophy along with other symptoms of bowel dysfunction, but its prevalence is poorly defined. We have surveyed 152 unselected myotonic dystrophy patients. We identified issues with bowel co