Author: "Strohmayer, Tod E." / Journal: the astrophysical journal letters - Searchworks@Jio Institute Digital Library Search Results

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Start Over Author "Strohmayer, Tod E." Journal the astrophysical journal letters

Author: Bult, Peter, primary, Altamirano, Diego, additional, Arzoumanian, Zaven, additional, Chakrabarty, Deepto, additional, Chenevez, Jérôme, additional, Ferrara, Elizabeth C., additional, Gendreau, Keith C., additional, Guillot, Sebastien, additional, Güver, Tolga, additional, Iwakiri, Wataru, additional, Jaisawal, Gaurava K., additional, Mancuso, Giulio C., additional, Malacaria, Christian, additional, Ng, Mason, additional, Sanna, Andrea, additional, Strohmayer, Tod E., additional, Wadiasingh, Zorawar, additional, and Wolff, Michael T., additional
Published: 2022
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Author: Strohmayer, Tod E and Keek, Laurens
Subjects: Astrophysics
Abstract: We present the discovery of 163.65 Hz X-ray pulsations from IGR J17062−6143 in the only observation obtained from the source with the Rossi X-ray Timing Explorer. This detection makes IGR J17062−6143 the lowest frequency accreting millisecond X-ray pulsar presently known. The pulsations are detected in the 2-12 keV band with an overall significance of 4.3sigma and an observed pulsed amplitude of 5.54% +/-0.67% (in this band). Both dynamic power spectral and coherent phase timing analysis indicate that the pulsation frequency is decreasing during the approx. =1.2 ks observation in a manner consistent with orbital motion of the neutron star. Because the observation interval is short, we cannot precisely measure the orbital period; however, periods shorter than 17 minutes are excluded at 90% confidence. For the range of acceptable circular orbits the inferred binary mass function substantially overlaps the observed range for the AMXP population as a whole.
Published: 2017
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Author: Younes, George, primary, Lander, Samuel K, additional, Baring, Matthew G., additional, Enoto, Teruaki, additional, Kouveliotou, Chryssa, additional, Wadiasingh, Zorawar, additional, Ho, Wynn C. G., additional, Harding, Alice K., additional, Arzoumanian, Zaven, additional, Gendreau, Keith, additional, Güver, Tolga, additional, Hu, Chin-Ping, additional, Malacaria, Christian, additional, Ray, Paul S., additional, and Strohmayer, Tod E., additional
Published: 2022
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Author: Enoto, Teruaki, primary, Ng, Mason, additional, Hu, Chin-Ping, additional, Güver, Tolga, additional, Jaisawal, Gaurava K., additional, O’Connor, Brendan, additional, Göğüş, Ersin, additional, Lien, Amy, additional, Kisaka, Shota, additional, Wadiasingh, Zorawar, additional, Majid, Walid A., additional, Pearlman, Aaron B., additional, Arzoumanian, Zaven, additional, Bansal, Karishma, additional, Blumer, Harsha, additional, Chakrabarty, Deepto, additional, Gendreau, Keith, additional, Ho, Wynn C. G., additional, Kouveliotou, Chryssa, additional, Ray, Paul S., additional, Strohmayer, Tod E., additional, Younes, George, additional, Palmer, David M., additional, Sakamoto, Takanori, additional, Akahori, Takuya, additional, and Eie, Sujin, additional
Published: 2021
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Author: Bogdanov, Slavko, primary, Dittmann, Alexander J., additional, Ho, Wynn C. G., additional, Lamb, Frederick K., additional, Mahmoodifar, Simin, additional, Miller, M. Coleman, additional, Morsink, Sharon M., additional, Riley, Thomas E., additional, Strohmayer, Tod E., additional, Watts, Anna L., additional, Choudhury, Devarshi, additional, Guillot, Sebastien, additional, Harding, Alice K., additional, Ray, Paul S., additional, Wadiasingh, Zorawar, additional, Wolff, Michael T., additional, Markwardt, Craig B., additional, Arzoumanian, Zaven, additional, and Gendreau, Keith C., additional
Published: 2021
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Author: Pasham, Dheeraj R, Strohmayer, Tod E, and Mushotzky, Richard F
Subjects: Astrophysics
Abstract: We report the discovery with XMM-Newton of an approx.. = 7 mHz X-ray (0.3-10.0 keV) quasi-periodic oscillation (QPO) from the eclipsing, high-inclination black hole binary IC 10 X-1. The QPO is significant at >4.33 sigma confidence level and has a fractional amplitude (% rms) and a quality factor, Q is identical with nu/delta nu, of approx. = 11 and 4, respectively. The overall X-ray (0.3-10.0 keV) power spectrum in the frequency range 0.0001-0.1 Hz can be described by a power-law with an index of approx. = −2, and a QPO at 7 mHz. At frequencies approx. > 0.02 Hz there is no evidence for significant variability. The fractional amplitude (rms) of the QPO is roughly energy-independent in the energy range of 0.3-1.5 keV. Above 1.5 keV the low signal-to-noise ratio of the data does not allow us to detect the QPO. By directly comparing these properties with the wide range of QPOs currently known from accreting black hole and neutron stars, we suggest that the 7 mHz QPO of IC 10 X-1 may be linked to one of the following three categories of QPOs: (1) the "heartbeat" mHz QPOs of the black hole sources GRS 1915+105 and IGR J17091−3624, or (2) the 0.6-2.4 Hz "dipper QPOs" of high-inclination neutron star systems, or (3) the mHz QPOs of Cygnus X-3.
Published: 2013
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