Zobrazeno 1 - 10
of 236
pro vyhledávání: '"Keek L"'
Autor:
Langer C., Montes F., Aprahamian A., Bardayan D. W., Bazin D., Brown B.A., Browne J., Crawford H., Cyburt R., Domingo-Pardo C., Gade A., George S., Hosmer P., Keek L., Kontos A., Lee I-Y., Lemasson A., Lunderberg E., Maeda Y., Matos M., Meisel Z., Noji S., Nystrom A., Perdikakis G., Pereira J., Quinn S., Recchia F., Schatz H., Scott M., Siegl K., Simon A., Smith M., Spyrou A., Stevens J., Stroberg R., Weisshaar D., Wheeler J., Wimmer K., Zegers R.G.T.
Publikováno v:
EPJ Web of Conferences, Vol 66, p 07013 (2014)
The level structure of neutron-deficient 58Zn has been extracted experimentally. This nucleus is important for the rapid proton-capture process. 58Zn was produced by using a (d,n)-type transfer reaction on 57Cu in inverse kinematics at beam energies
Externí odkaz:
https://doaj.org/article/87134eb121374a408213010fc4ca519c
Autor:
Albayati, A. C., Altamirano, D., Jaisawal, G. K., Bult, P., Rapisarda, S., Mancuso, G. C., Güver, T., Arzoumanian, Z., Chakrabarty, D., Chenevez, J., Court, J. M. C., Gendreau, K. C., Guillot, S., Keek, L., Malacaria, C., Strohmayer, T. E.
Publikováno v:
MNRAS, 501 (2021) 261-268
MAXI J1807+132 is a low-mass X-ray binary (LMXB) first detected in outburst in 2017. Observations during the 2017 outburst did not allow for an unambiguous identification of the nature of the compact object. MAXI J1807+132 was detected in outburst ag
Externí odkaz:
http://arxiv.org/abs/2011.10448
Autor:
Galloway, D. K., Zand, J. J. M. in 't, Chenevez, J., Wörpel, H., Keek, L., Ootes, L., Watts, A. L., Gisler, L., Sanchez-Fernandez, C., Kuulkers, E.
Publikováno v:
The Astrophysical Journal Supplement Series, Volume 249, Number 2, 2020
We present the largest sample of type-I (thermonuclear) X-ray bursts yet assembled, comprising 7083 bursts from 85 bursting sources. The sample is drawn from observations with Xenon-filled proportional counters on the long-duration satellites RXTE, B
Externí odkaz:
http://arxiv.org/abs/2003.00685
Autor:
Strohmayer, T. E., Altamirano, D., Arzoumanian, Z., Bult, P. M., Chakrabarty, D., Chenevez, J., Fabian, A. C., Gendreau, K. C., Guillot, S., Zand, J. J. M. in 't, Jaisawal, G. K., Keek, L., Kosec, P., Ludlam, R. M., Mahmoodifar, S., Malacaria, C., Miller, J. M.
We report the discovery with the Neutron Star Interior Composition Explorer (NICER) of narrow emission and absorption lines during photospheric radius expansion (PRE) X-ray bursts from the ultracompact binary 4U 1820-30. NICER observed the source in
Externí odkaz:
http://arxiv.org/abs/1906.00974
We report the discovery of Type I (thermonuclear) X-ray bursts from the transient source XMMU J181227.8-181234 = XTE J1812-182. We found 7 X-ray bursts in Rossi X-ray Timing Explorer observations during the 2008 outburst, confirming the source as a n
Externí odkaz:
http://arxiv.org/abs/1904.10970
Accreting neutron stars (NS) can exhibit high-frequency modulations, known as burst oscillations, in their lightcurves during thermonuclear X-ray bursts. Their frequencies can be offset from the spin frequency of the NS (known independently) by sever
Externí odkaz:
http://arxiv.org/abs/1811.12111
Autor:
Keek, L., Arzoumanian, Z., Bult, P., Cackett, E. M., Chakrabarty, D., Chenevez, J., Fabian, A. C., Gendreau, K. C., Guillot, S., Güver, T., Homan, J., Jaisawal, G. K., Lamb, F. K., Ludlam, R. M., Mahmoodifar, S., Markwardt, C. B., Miller, J. M., Prigozhin, G., Soong, Y., Strohmayer, T. E., Wolff, M. T.
Publikováno v:
The Astrophysical Journal Letters, Volume 855, Issue 1, article id. L4, 6 pp. (2018)
Accretion disks around neutron stars regularly undergo sudden strong irradiation by Type I X-ray bursts powered by unstable thermonuclear burning on the stellar surface. We investigate the impact on the disk during one of the first X-ray burst observ
Externí odkaz:
http://arxiv.org/abs/1808.06441
Autor:
Keek, L., Arzoumanian, Z., Chakrabarty, D., Chenevez, J., Gendreau, K. C., Guillot, S., Güver, T., Homan, J., Jaisawal, G. K., LaMarr, B., Lamb, F. K., Mahmoodifar, S., Markwardt, C. B., Okajima, T., Strohmayer, T. E., Zand, J. J. M. in 't
Publikováno v:
The Astrophysical Journal Letters, Volume 856, Issue 2, article id. L37, 6 pp. (2018)
The Neutron Star Interior Composition Explorer (NICER) on the International Space Station (ISS) observed strong photospheric expansion of the neutron star in 4U 1820-30 during a Type I X-ray burst. A thermonuclear helium flash in the star's envelope
Externí odkaz:
http://arxiv.org/abs/1808.06442
Autor:
Ludlam, R. M., Miller, J. M., Arzoumanian, Z., Bult, P. M., Cackett, E. M., Chakrabarty, D., Dauser, T., Enoto, T., Fabian, A. C., Garcia, J. A., Gendreau, K. C., Guillot, S., Homan, J., Jaisawal, G. K., Keek, L., La Marr, B., Malacaria, C., Markwardt, C. B., Steiner, J. F., Strohmayer, T. E.
We present Neutron Star Interior Composition Explorer (NICER) observations of the neutron star low-mass X-ray binary Serpens X-1 during the early mission phase in 2017. With the high spectral sensitivity and low-energy X-ray passband of NICER, we are
Externí odkaz:
http://arxiv.org/abs/1804.10214
Accreting neutron stars (NS) can exhibit high frequency modulations in their lightcurves during thermonuclear X-ray bursts, known as burst oscillations. The frequencies can be offset from the spin frequency of the NS by several Hz, and can drift by 1
Externí odkaz:
http://arxiv.org/abs/1804.02189