Results 81 to 90 of about 130,686 (336)

Simultaneous NICER and NuSTAR Observations of the Ultracompact X-Ray Binary 4U 0614+091

The Astrophysical Journal, 2023
We present the first joint NuSTAR and NICER observations of the ultracompact X-ray binary 4U 0614+091. This source shows quasiperiodic flux variations on the timescale of ∼days.
D. L. Moutard, R. M. Ludlam, J. A. García, D. Altamirano, D. J. K. Buisson, E. M. Cackett, J. Chenevez, N. Degenaar, A. C. Fabian, J. Homan, A. Jaodand, S. N. Pike, A. W. Shaw, T. E. Strohmayer, J. A. Tomsick, B. M. Coughenour   +15 more
doaj   +1 more source

A Chandra X-ray Study of the Globular Cluster M80

, 2003
We report our analysis of a Chandra X-ray observation of the rich globular cluster M80, in which we detect some 19 sources to a limiting 0.5-2.5 keV X-ray luminosity of 7*10^30 ergs/s within the half-mass radius.
Auwers G. F., Brocato E., C. O. Heinke, D. A. Lloyd, H. N. Cohn, Hakala P. J., J. E. Grindlay, Johnston H. M., P. D. Edmonds, P. M. Lugger, Predehl P., S. S. Murray, Verbunt F.   +12 more
core   +1 more source

On the binary nature of massive blue hypergiants: high-resolution X-ray spectroscopy suggests that Cyg OB2 12 is a colliding wind binary [PDF]

, 2017
The blue hypergiant Cyg OB2-12 (B3Ia+) is a representative member of the class of very massive stars in a poorly understood evolutionary stage. We obtained its high-resolution X-ray spectrum using Chandra observatory.
Hainich, R., Hamann, Wolf-Rainer, Huenemoerder, David P., Ignace, Richard, Oskinova, Lidia M., Sander, A. A.C., Shenar, Tomer, Todt, H.   +7 more
core   +3 more sources

Hard X-ray colours of neutron star and black hole low mass X-ray binaries with INTEGRAL [PDF]

Advances in Space Research, 2007
Paper from poster presentation at COSPAR meeting, Beijing, 2006.
Paltani, Stéphane, Courvoisier, Thierry, Parmar, Arvind, Parmar, Arvind, Shaw, Simon, Paizis, Ada, Shaw, Simon, Mowlavi, Nami, Paltani, Stephane, Courvoisier, Thierry, Paizis, Ada, Mowlavi, Nami   +11 more
openaire   +2 more sources

Optical spectroscopy of the low‐mass X‐ray binary GX 9+9 [PDF]

, 2007
Phase-resolved medium-resolution VLT spectroscopy of the low-mass X-ray binary GX 9+9 has revealed narrow C ill emission lines that move in phase relative to our new estimate of the ephemeris, and show a velocity amplitude of 230 +/not superset of 35 km ...
R. Cornelisse, R. Cornelisse, D. Steeghs, D. Steeghs, J. Casares, P. Charles, A. D. Barnes, R. Hynes, K. O’Brien   +8 more
semanticscholar   +1 more source

Cathodic Cage Plasma Deposition of Nanostructured Cu–Fe–Se Coatings on Poly(methyl Methacrylate)

Advanced Engineering Materials, EarlyView.
Nanostructured Cu–Fe–Se coatings are deposited on PMMA by a modified cathodic cage plasma process, enabling low‐temperature deposition on polymer substrates. A transition from discontinuous to compact morphology is observed with temperature, with optimal properties at 200°C, where improved CuFeSe2‐type bonding, lowest sheet resistance, and favorable ...
V. S. S. Sobrinho, M. Naeem, T. H. C. Costa, M. S. Libório, J. C. A. Queiroz, C. B. B. Luna, R. R. M. Sousa, P. S. Vieira, E. M. Araújo   +8 more
wiley   +1 more source

Photospheric Radius Expansion Thermonuclear Burst and X-Ray Reflection from the Neutron Star X-Ray Binary 4U 1702-429

The Astrophysical Journal
We perform a comprehensive study of thermonuclear bursts from the neutron star low-mass X-ray binary 4U 1702–429 detected with NICER and XMM-Newton. The thermonuclear burst detected with NICER shows clear evidence of a photospheric radius expansion (PRE)
Manoj Mandal, Sachindra Naik, Gaurava Kumar Jaisawal   +2 more
doaj   +1 more source

Carina OB Stars: X-ray Signatures of Wind Shocks and Magnetic Fields [PDF]

, 2011
The Chandra Carina Complex contains 200 known O- and B type stars. The Chandra survey detected 68 of the 70 O stars and 61 of 127 known B0-B3 stars. We have assembled a publicly available optical/X-ray database to identify OB stars that depart from the ...
Anthony F. J. Moffat, Antokhin, Babel, Benaglia, Berghoefer, Bessell, Broos, Cassinelli, Cassinelli, Castelli, Cohen, Cohen, Cohen, Corcoran, Daniel, David H. Cohen, de Jager, DeGioia-Eastwood, Evans, Evans, Feigelson, Feldmeier, Forte, Freyhammer, Gagne, Gagné, Gamen, Garrett Fehon, Gayley, Getman, Hamaguchi, Hillier, Hoffmeister, Ignace, Leisa K. Townsley, Leutenegger, Lida M. Oskinova, Lépine, Lépine, Maiz Apellaniz, Marc Gagné, Massey, Matthew S. Povich, Maíz Apellániz, Mermilliod, Michael F. Corcoran, Michael R. Savoy, Miroshnichenko, Moffat, Mullan, Nancy Remage Evans, Nelan, Nelan, Nolan R. Walborn, Owocki, Patience, Patrick S. Broos, Pollock, Puls, Rauw, Reed, Robitaille, Robitaille, Sanchawala, Schulz, Skiff, Skinner, Skinner, Smith, Smith, Sota, Stelzer, Turner, ud-Doula, Vazquez, Walborn, Walborn, Walborn, Walborn, Walborn, Waldron, Wegner, Wojdowski, Wolk, Wright, Yaël Nazé, Zinnecker   +86 more
core   +4 more sources

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

Advanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal, Laura Calderón‐Rodríguez, Oksana Smirnova, Eren Grossmann, Aparna Binu Varghese, Karen Marlenne Garcia Alvarez, Andreas Schneemann, Thomas Hoyer, Ralf Wyrwa, Felix Helmut Schacher, Alexander Knebel   +10 more
wiley   +1 more source

Chasing the Break: Tracing the Full Evolution of a Black Hole X-Ray Binary Jet with Multiwavelength Spectral Modeling

The Astrophysical Journal
Black hole (BH) X-ray binaries (XRBs) are ideal targets to study the connection between accretion inflow and jet outflow. Here we present quasi-simultaneous, multiwavelength observations of the Galactic BH system MAXI J1820+070, throughout its 2018–2019 ...
Constanza Echiburú-Trujillo, Alexandra J. Tetarenko, Daryl Haggard, Thomas D. Russell, Karri I. I. Koljonen, Arash Bahramian, Jingyi Wang, Michael Bremer, Joe Bright, Piergiorgio Casella, David M. Russell, Diego Altamirano, M. Cristina Baglio, Tomaso Belloni, Chiara Ceccobello, Stephane Corbel, Maria Diaz Trigo, Dipankar Maitra, Aldrin Gabuya, Elena Gallo, Sebastian Heinz, Jeroen Homan, Erin Kara, Elmar Körding, Fraser Lewis, Matteo Lucchini, Sera Markoff, Simone Migliari, James C. A. Miller-Jones, Jerome Rodriguez, Payaswini Saikia, Craig L. Sarazin, Tariq Shahbaz, Gregory Sivakoff, Roberto Soria, Vincenzo Testa, Bailey E. Tetarenko, Valeriu Tudose   +37 more
doaj   +1 more source