Zobrazeno 1 - 10
of 37 921
pro vyhledávání: '"orbital parameters"'
Autor:
Matchett, Natalie, van Soelen, Brian
The gamma-ray binary HESS J0632+057 consists of a Be star and an undetected compact object in a $\sim$317 day orbit. The interpretation of the emission from this system is complicated by the lack of a clear orbital solution, as two different and inco
Externí odkaz:
http://arxiv.org/abs/2411.12499
In the post-Newtonian (PN) expansion, we extend the determination of quasicircular orbital parameters to be used by subsequent full numerical simulations to the 3.5PN order, and find that this leads to lower eccentricities, $e$, than with our previou
Externí odkaz:
http://arxiv.org/abs/2406.11564
Publikováno v:
Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki, Vol 22, Iss 5, Pp 62-70 (2024)
A method for estimating the orbital parameters of a nanosatellite-relay, implemented by measuring the total electron content in the ionosphere based on relaying GPS navigation signals at frequencies of 150/400 MHz, is substantiated. The method involv
Externí odkaz:
https://doaj.org/article/2adf12ed9dff4a02a71921ff514e7cce
Autor:
Nardetto, N., Hocdé, V., Kervella, P., Gallenne, A., Gieren, W., Graczyk, D., Merand, A., Rainer, M., Storm, J., Pietrzynski, G., Pilecki, B., Poretti, E., Bailleul, M., Afanasiev, G. Bras A.
An inner companion has recently been discovered orbiting the prototype of classical Cepheids, delta Cep, whose orbital parameters are still not fully constrained. We collected new precise radial velocity measurements of delta Cep in 2019 using the HA
Externí odkaz:
http://arxiv.org/abs/2404.01851
Finding a suitable very long baseline (VLBI) interferometer geometry is a key task in planning observations, especially imaging sessions. The main characteristic of the quality of VLBI imaging data is the (u, v)-coverage. In the case when one or more
Externí odkaz:
http://arxiv.org/abs/2403.20187
Comprehensive observations of galaxy clusters suggest that gas deficiency in the galaxies could be due to ram pressure stripping due to the high-pressure intra-cluster medium acting on the galactic discs. The presence of gas in galaxies is essential
Externí odkaz:
http://arxiv.org/abs/2403.13419
Autor:
Garcia-Fernandez, Miquel
The emergence of Low Earth Orbit (LEO) satellite constellations dedicated to positioning applications holds the promise of improving the capabilities of existing Global Navigation Satellite Systems (GNSS). However, the absence of operational systems
Externí odkaz:
http://arxiv.org/abs/2401.17767
Autor:
Rankin, John, Kravtsov, Vadim, Muleri, Fabio, Poutanen, Juri, Marin, Frédéric, Capitanio, Fiamma, Matt, Giorgio, Costa, Enrico, Di Marco, Alessandro, Fabiani, Sergio, La Monaca, Fabio, Marra, Lorenzo, Soffitta, Paolo
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. The inclination of these systems is a major u
Externí odkaz:
http://arxiv.org/abs/2312.16967
Autor:
Yuan, Hailong, Li, Zhenwei, Bai, Zhongrui, Dong, Yiqiao, Cheng, Yao, Chen, Xuefei, Zhixiang, Zhang, Wang, Mengxin, Yang, Mingkuan, Huang, Xin, He, Yuji, Zhang, Liyun, Wang, Junfeng, Zhao, Yongheng, Chu, Yaoquan, Zhang, Haotong
Double white dwarf systems are of great astrophysical importance in the field of gravitational wave and Type Ia supernova. While the binary fraction of CO core white dwarf is about a few percents, the extremely low mass white dwarfs are all thought t
Externí odkaz:
http://arxiv.org/abs/2310.04108
Autor:
Sushch, Iurii, van Soelen, Brian
Gamma-ray binaries are binary systems where the energy flux peaks in the gamma-ray energy band. They harbour a compact object (a neutron star or a black hole) orbiting around a massive star that provides a strong radiation field. It is believed that
Externí odkaz:
http://arxiv.org/abs/2310.01102