Zobrazeno 1 - 10
of 421
pro vyhledávání: '"Kandel D"'
Autor:
Kandel, D., Romani, Roger W.
The optical study of the heated substellar companions of `Black Widow' (BW) millisecond pulsars (MSP) provides unique information on the MSP particle and radiation output and on the neutron star mass. Here we present analysis of optical photometry an
Externí odkaz:
http://arxiv.org/abs/2211.16990
We describe Keck-telescope spectrophotometry and imaging of the companion of the ``black widow" pulsar PSR~J0952$-$0607, the fastest known spinning neutron star (NS) in the disk of the Milky Way. The companion is very faint at minimum brightness, pre
Externí odkaz:
http://arxiv.org/abs/2207.05124
In a multi-orbit (100 ks) $\mathrm{\it XMM-Newton}$ exposure of the original black widow pulsar, PSR J1959+2048, we measure the strong orbital modulation caused by intrabinary shock (IBS) emission. The IBS light curve peak appears asymmetric, which w
Externí odkaz:
http://arxiv.org/abs/2107.08156
Keck-telescope spectrophotometry of the companion of PSR J1810+1744 shows a flat, but asymmetric light-curve maximum and a deep, narrow minimum. The maximum indicates strong gravity darkening near the L_1 point, along with a heated pole and surface w
Externí odkaz:
http://arxiv.org/abs/2101.09822
Redback millisecond pulsars (MSPs) typically show pronounced orbital variability in their X-ray emission due to our changing view of the intrabinary shock (IBS) between the pulsar wind and stellar wind from the companion. Some redbacks ("transitional
Externí odkaz:
http://arxiv.org/abs/2009.13561
We analyze photometry and spectra of the "redback" millisecond pulsar binary J2339$-$0533. These observations include new measurements from Keck and GROND, as well as archival measurements from the OISTER, WIYN, SOAR, and HET telescopes. The paramete
Externí odkaz:
http://arxiv.org/abs/2009.04105
Autor:
Nieder, L., Clark, C. J., Kandel, D., Romani, R. W., Bassa, C. G., Allen, B., Ashok, A., Cognard, I., Fehrmann, H., Freire, P., Karuppusamy, R., Kramer, M., Li, D., Machenschalk, B., Pan, Z., Papa, M. A., Ransom, S. M., Ray, P. S., Roy, J., Wang, P., Wu, J., Aulbert, C., Barr, E. D., Beheshtipour, B., Behnke, O., Bhattacharyya, B., Breton, R. P., Camilo, F., Choquet, C., Dhillon, V. S., Ferrara, E. C., Guillemot, L., Hessels, J. W. T., Kerr, M., Kwang, S. A., Marsh, T. R., Mickaliger, M. B., Pleunis, Z., Pletsch, H. J., Roberts, M. S. E., Sanpa-arsa, S., Steltner, B.
We report the discovery of 1.97 ms period gamma-ray pulsations from the 75 minute orbital-period binary pulsar now named PSR J1653-0158. The associated Fermi Large Area Telescope gamma-ray source 4FGL J1653.6-0158 has long been expected to harbor a b
Externí odkaz:
http://arxiv.org/abs/2009.01513
Magnetic turbulence is anisotropic as the directions of motion are constrained by the magnetic field. Such anisotropy can be observed in velocity centroids obtained from spectroscopic observations. We use magnetohydrodynamics (MHD) simulations to pro
Externí odkaz:
http://arxiv.org/abs/2008.05393
Autor:
Kandel, D., Romani, Roger W.
We present a model for atmospheric wind circulation in binary millisecond pulsar (MSP) companions, showing how the optical light curve (LC) and radial velocities (RV) are sensitive to the wind flow, causing LC orbital phase shifts and asymmetries, as
Externí odkaz:
http://arxiv.org/abs/2002.12483
We model millisecond pulsars winds colliding with radiatively-driven companion winds in black widow and redback systems. For the redbacks, the geometry of this intrabinary shock (IBS) is quite sensitive to the expected equatorial concentration in the
Externí odkaz:
http://arxiv.org/abs/1905.12591