Results 61 to 70 of about 2,506 (304)

X-Ray Polarimetry as a Tool to Constrain Orbital Parameters in X-Ray Binaries

The Astrophysical Journal
X-ray binary systems consist of a companion star and a compact object in close orbit. Thanks to their copious X-ray emission, these objects have been studied in detail using X-ray spectroscopy and timing.
John Rankin, Vadim Kravtsov, Fabio Muleri, Juri Poutanen, Frédéric Marin, Fiamma Capitanio, Giorgio Matt, Enrico Costa, Alessandro Di Marco, Sergio Fabiani, Fabio La Monaca, Lorenzo Marra, Paolo Soffitta   +12 more
doaj   +1 more source

High Mass X-ray Binaries: The Donor Stars and their Compact Companions [PDF]

, 2008
This thesis presents new spectroscopic observations of the donor star in several High Mass X-ray Binary systems. The various types of X-ray Binary systems that exist are outlined and the methods and limitations of mass determination of the stellar components are discussed. The masses of the compact objects are determined for the systems SMC X-1 and LMC
openaire   +1 more source

Oxygen‐Tunnel Indium Tin Oxide Vertical Channel Transistors with Enhanced Current Density and Reliability for Monolithic 3D Compute‐In‐Memory Systems

Advanced Functional Materials, EarlyView.
Oxygen‐tunnel (OT) indium tin oxide (ITO) vertical channel transistors (VCTs) enable reliable, high‐density gain‐cell memory for monolithic 3D integration. A sandwiched SiN/SiO2/SiN OT stack selectively regulates oxygen transport, suppressing parasitic electrode oxidation while stabilizing channel oxygen vacancies, thereby suppressing carrier injection
Hyeonho Gu, Haksoon Jung, Yongwoo Lee, Hoichang Jeong, Yanfeng Zhao, Heesoo Yang, Minho Park, Hyeonjin Lee, Seunghun Baek, Minju Song, Junghwan Kim, Youngmin Jo, Hyunjin Park, Munhyeon Kim, Jae‐Joon Kim, Kyuho Jason Lee, Byungjo Kim, Jimin Kwon   +17 more
wiley   +1 more source

Compact objects in active galactic nuclei and X-ray binaries [PDF]

, 2007
In this thesis I study the inner-most regions of Active Galactic Nuclei (AGN) using the reverberation mapping technique, and neutron star low-mass X-ray binaries in quiescence using X-ray observations. Using the 13-year optical monitoring data for the
Cackett, Edward M.
core  

The galactic bulge survey : outline and X-ray observations [PDF]

, 2011
We introduce the Galactic Bulge Survey (GBS) and we provide the Chandra source list for the region that has been observed to date. Among the goals of the GBS are constraining the neutron star (NS) equation of state and the black hole (BH) mass ...
Rea, N., J. Clem, Astrophysics, Maccarone, T. J., C. G. Bassa, L. Gossen, Wijnands, R., Oezel, F., Afd Astrophysics begr 1/1/17, J. J. M. In't Zand, G. Nelemans, A. C. Collazzi, Hynes, R.I., M. A. P. Torres, E. Kuulkers, R. I. Hynes, C. Heinke, M. Méndez, Dep Natuurkunde, F. Özel, Groot, P.J., S. Greiss, Haaften, L.M., R. Wijnands, Verbunt, F., V. J. Mikles, Méndez, M., Jonker, P. G., Collazzi, A.C., Mikles, V. J., Heinke, C., Bassa, C. G., D. Steeghs, Nelemans, G., Verbunt, F.W.M., Maccarone, T.J., Groot, P. J., in 't Zand, J.J.M., Dieball, A., Britt, C. T., Ratti, E. M., F. Verbunt, Steeghs, D., P. J. Groot, Mendez, M. M., van Haaften, L. M., T. J. Maccarone, Collazzi, A. C., Haaften, L.M. van, Torres, M. A.P., Torres, M. A. P., E. M. Ratti, Kuulkers, E., Britt, C.T., N. Rea, P. G. Jonker, L. M. van Haaften, Hynes, R. I., A. Dieball, C. T. Britt, Zand, J. J. M. In't, Bassa, C.G., Mikles, V.J., Jonker, P.G., Torres, M.A.P., Mendez, M.; id_orcid, Greiss, Sandra, Clem, J., Özel, F., Jonker, P., Nelemans, G.A., In't Zand, J. J. M., Sub High energy Astrophysics begr 1/1/15, In\u27T Zand, J. J.M., Gossen, L., Greiss, S., Ratti, E.M.   +76 more
core   +1 more source

Orbital Phase Shifts of Type-I Outbursts in EXO 2030+375

The Astrophysical Journal
EXO 2030+375 is a peculiar high-mass X-ray binary that has been exhibiting Type-I outburst activities consistently over the past decades. The phases of outburst peaks are generally stable and occur near the orbital periastron.
Run-Ting Huang, Long Ji, Jing-Zhi Yan
doaj   +1 more source

High-mass X-ray Binaries and OB-runaway Stars

, 2001
High-mass X-ray binaries (HMXBs) represent an important phase in the evolution of massive binary systems. HMXBs provide unique diagnostics to test massive-star evolution, to probe the physics of radiation-driven winds, to study the process of mass accretion, and to measure fundamental parameters of compact objects.
openaire   +4 more sources

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

On the binary nature of 1RXS J162848.1−415241 [PDF]

, 2005
We present spectroscopy of the optical counterpart to 1RXS J162848.1-41524, also known as the microquasar candidate MCQC J162847-4152. All the data indicate that this X-ray source is not a microquasar and that it is a single-lined chromospherically ...
J. E. McClintock, D. Steeghs, M. A. P. Torres, Torres, M. A. P., McClintock, Jeffrey E., Steeghs, D., M. R. Garcia, Garcia, M. R.   +7 more
core   +1 more source

Discovery of a New Phase-transient Cyclotron Line in A0535+26: Constraints on the Accretion Geometry

The Astrophysical Journal
In 2020 November, A0535+26 underwent one of its brightest outbursts, reaching nearly 12 Crab in X-ray flux. Observed by Insight-HXMT, NuSTAR, NICER, and AstroSat, this event provided valuable insights into Be/X-ray binaries.
Ashwin Devaraj, Biswajit Paul, Varun Bhalerao, Dipanjan Mukherjee   +3 more
doaj   +1 more source