Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Simonetti, John H."'
The collision of a primordial black hole with a neutron star results in the black hole eventually consuming the entire neutron star. However, if the black hole is magnetically charged, and therefore stable against decay by Hawking radiation, the cons
Externí odkaz:
http://arxiv.org/abs/2209.06060
Autor:
Berglund, Per, Dai, De-Chang, Edmonds, Douglas, He, Yang-Hui, Hubsch, Tristan, Jejjala, Vishnu, Kavic, Michael J., Minic, Djordje, Powers, Samuel, Simonetti, John H., Stojkovic, Dejan, Takeuchi, Tatsu
We discuss the relevance of quantum gravity to the frontier questions in high energy phenomenology: the problems of dark matter, dark energy, and vacuum selection as well as the problems of emergent spacetime and wormholes. Dark matter and dark energ
Externí odkaz:
http://arxiv.org/abs/2202.05104
Publikováno v:
Phys. Rev. D 104, 081502 (2021)
The realm of strong classical gravity and perhaps even quantum gravity are waiting to be explored. In this letter we consider the recently detected triple system composed of two stars and a non-accreting black hole. Using published observations of th
Externí odkaz:
http://arxiv.org/abs/2007.12184
Publikováno v:
Phys. Rev. Phys. Educ. Res. 17, 010101 (2021)
A large body of research shows that using interactive engagement pedagogy in the introductory physics classroom consistently results in significant student learning gains; however, with a few exceptions, those learning gains tend not to be accompanie
Externí odkaz:
http://arxiv.org/abs/2003.02704
Publikováno v:
JCAP 08 (2020) 005
Black holes in binaries with other compact objects can provide natural venues for indirect detection of axions or other ultralight fields. The superradiant instability associated with a rapidly spinning black hole leads to the creation of an axion cl
Externí odkaz:
http://arxiv.org/abs/1910.06977
Publikováno v:
2017 PASP 129 024301
In this work we adopted a CLEAN-based method to determine the scatter time, $\tau$, from archived pulsar profiles under both the thin screen and uniform medium scattering models and to calculate the scatter time frequency scale index $\alpha$ where $
Externí odkaz:
http://arxiv.org/abs/1701.05675
Autor:
Tsai, Jr-Wei, Simonetti, John H, Akukwe, Bernadine, Bear, Brandon, Gough, Jonathan D, Shawhan, Peter, Kavic, Michael
Publikováno v:
The Astronomical Journal 151 (2), 28, 2016
We report the detection of giant pulse emission from PSR~B0950+08 in 12 hours of observations made simultaneously at 42~MHz and 74~MHz, using the first station of the Long Wavelength Array, LWA1. We detected 275 giant pulses (in 0.16\% of the pulse p
Externí odkaz:
http://arxiv.org/abs/1608.01948
Autor:
Tsai, Jr-Wei, Simonetti, John H., Bear, Brandon, Gough, Jonathan D., Newton, Joseph R., Kavic, Michael
Publikováno v:
The Astronomical Journal 151 (3), 65, 2016
The first station of the Long Wavelength Array (LWA1) was used to study PSR~B0031-07 with simultaneous observations at 38 and 74~MHz. We found that 158 (0.35\%) of the observed pulses at 38~MHz and 221 (0.49\%) of the observed pulses at 74~MHz qualif
Externí odkaz:
http://arxiv.org/abs/1608.01950
Autor:
Cutchin, Sean E., Simonetti, John H., Ellingson, Steven W., Larracuente, Amanda S., Kavic, Michael J.
Publikováno v:
PASP 127 1269 (2015)
An exploding primordial black-hole (PBH) may produce a single pulse of electromagnetic radiation detectable at the low-frequency end of the radio spectrum. Furthermore, a radio transient from an exploding PBH could be a signature of an extra spatial
Externí odkaz:
http://arxiv.org/abs/1608.01945
Publikováno v:
Astrophys.J. 837 (2017) no.1, 87
Pulsars are some of the most accurate clocks found in nature, while black holes offer a unique arena for the study of quantum gravity. As such, pulsar-black hole (PSR-BH) binaries provide ideal astrophysical systems for detecting the effects of quant
Externí odkaz:
http://arxiv.org/abs/1607.00018