Results 91 to 100 of about 20,039 (169)

Localizing Dynamically Formed Black Hole Binaries in Milky Way Globular Clusters with LISA

The Astrophysical Journal Letters
The dynamical formation of binary black holes (BBHs) in globular clusters (GCs) may contribute significantly to the observed gravitational-wave (GW) merger rate.
Zeyuan Xuan, Kyle Kremer, Smadar Naoz
doaj   +1 more source

The Influence of Stellar Chromospheres and Coronae on Exoplanet Transmission Spectroscopy

The Astrophysical Journal Letters
A main source of bias in transmission spectroscopy of exoplanet atmospheres is magnetic activity of the host star in the form of stellar spots, faculae, or flares. However, the fact that main-sequence stars have a chromosphere and a corona and that these
Volker Perdelwitz, Adam Chaikin-Lifshitz, Aviv Ofir, Oded Aharonson   +3 more
doaj   +1 more source

Lie Markov models with purine/pyrimidine symmetry [PDF]

, 2013
Continuous-time Markov chains are a standard tool in phylogenetic inference. If homogeneity is assumed, the chain is formulated by specifying time-independent rates of substitutions between states in the chain.
Fernández-Sánchez, Jesús, Jarvis, Peter D., Sumner, Jeremy G., Woodhams, Michael D.   +3 more
core   +2 more sources

Thermofield Dynamics and Casimir Effect for Fermions

, 2004
A generalization of the Bogoliubov transformation is developed to describe a space compactified fermionic field. The method is the fermionic counterpart of the formalism introduced earlier for bosons (J. C. da Silva, A. Matos Neto, F. C. Khanna and A. E.
A.E. Santana, Abdala, Abdala, Alves, Ambjørn, Ambjørn, Atick, Boyer, Boyer, Bressi, Brown, Buks, Caruso, Caruso, Casimir, Chodos, Cougo-Pinto, da Silva, da Silva, De Paola, Dolan, Dzyaloshinskii, Elizalde, F.C. Khanna, Feinberg, Gundersen, H. Queiroz, Itzykson, J.C. da Silva, J.M.C. Malbouisson, Johnson, Kenneth, Klimchitskaya, Lamoreaux, Lifshitz, Lukosz, Lütken, Lütken, M. Revzen, Malbouisson, Malbouisson, Malbouisson, Maruyama, Mehra, Milonni, Mohideen, Mostepanenko, Ojima, Plunien, Polchinski, Ravndal, Revzen, Revzen, Robaschik, Saito, Santana, Seife, Serry, Soutome, Sundberg, Tadaki, Takahashi, Umezawa, Umezawa   +63 more
core   +1 more source

The First Polarimetric View on Quasiperiodic Oscillations in a Black Hole X-Ray Binary

The Astrophysical Journal Letters
We present the first polarimetric analysis of quasiperiodic oscillations (QPOs) in a black hole binary utilizing IXPE data. Our study focuses on Swift J1727.8–1613, which experienced a massive outburst that was observed by various telescopes across ...
Qing-Chang Zhao, Lian Tao, Han-Cheng Li, Shuang-Nan Zhang, Hua Feng, Ming-Yu Ge, Long Ji, Ya-Nan Wang, Yue Huang, Xiang Ma, Liang Zhang, Jin-Lu Qu, Yan-Jun Xu, Shu Zhang, Qian-Qing Yin, Qing-Cang Shui, Rui-Can Ma, Shu-Jie Zhao, Pan-Ping Li, Zi-Xu Yang, He-Xin Liu, Wei Yu   +21 more
doaj   +1 more source

A Multimessenger Search for the Supermassive Black Hole Binary in 3C 66B with the Parkes Pulsar Timing Array

The Astrophysical Journal Letters
A subparsec supermassive black hole binary (SMBHB) at the center of the galaxy 3C 66B is a promising candidate for continuous gravitational-wave searches with pulsar timing arrays (PTAs).
Jacob Cardinal Tremblay, Boris Goncharov, Rutger van Haasteren, N. D. Ramesh Bhat, Zu-Cheng Chen, Valentina Di Marco, Satoru Iguchi, Agastya Kapur, Wenhua Ling, Rami Mandow, Saurav Mishra, Daniel J. Reardon, Ryan M. Shannon, Hiroshi Sudou, Jingbo Wang, Shi-Yi Zhao, Xing-Jiang Zhu, Andrew Zic   +17 more
doaj   +1 more source

Characterizing Alfvénicity and Proton Temperature Distributions in Interplanetary Coronal Mass Ejection Magnetic Clouds

The Astrophysical Journal Letters
We investigated a comprehensive sample of 474 interplanetary coronal mass ejection (ICME) events observed by the Wind spacecraft to examine the Alfvénic characteristics within their magnetic cloud regions.
Kishor Kumbhar, Anil Raghav, Utkarsh Sharma, Omkar Dhamane, Kalpesh Ghag, Ajay Kumar, Mariyam Karari, Mohit Shah, Shubham Kadam   +8 more
doaj   +1 more source

Reversible implementation of a disrete linear transformation [PDF]

, 2010
Discrete linear transformations form important steps in processing information. Many such transformations are injective and therefore are prime candidates for a physically reversible implementation into hardware. We present here the first steps towards a
Burignat, Stéphane, De Vos, Alexis, Thomsen, Michael   +2 more
core   +1 more source

Detection of Deuterated Hydrocarbon Nanoparticles in the Whirlpool Galaxy, M51

The Astrophysical Journal Letters
Deuteration of hydrocarbon material, including polycyclic aromatic hydrocarbons (PAHs), has been proposed to account for the low gas-phase abundances of D in the interstellar medium (ISM). JWST spectra of four star-forming regions in M51 show an emission
B. T. Draine, Karin Sandstrom, Daniel A. Dale, J.-D. T. Smith, Ryan Chown, Grant P. Donnelly, Sara E. Duval, Cory M. Whitcomb, Angela Adamo, L. Armus, Danielle A. Berg, Torsten Böker, Alberto D. Bolatto, Martha L. Boyer, Daniela Calzetti, B. G. Elmegreen, Brandt A. L. Gaches, Karl D. Gordon, L. K. Hunt, R. C. Kennicutt, Ralf S. Klessen, Thomas S.-Y. Lai, Adam K. Leroy, Sean T. Linden, Alex Pedrini, Noah S. J. Rogers, Julia C. Roman-Duval, Eva Schinnerer, Evan B. Skillman, Fabian Walter, Tony D. Weinbeck, Benjamin F. Williams   +31 more
doaj   +1 more source

Quantum Statistical Effects on Warm Dark Matter and the Mass Constraint from the Cosmic Structure at Small Scales

The Astrophysical Journal Letters
The suppression of the small-scale matter power spectrum is a distinct feature of warm dark matter (WDM), which permits a constraint on the WDM mass from galaxy surveys. In the thermal relic WDM scenario, quantum statistical effects are not manifest.
Zhijian Zhang, Weikang Lin
doaj   +1 more source