Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Galactic radio sources"'
Autor:
Andrzej A. Zdziarski, Sebastian Heinz
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 1, p L7 (2024)
Accreting black hole binaries change their properties during evolution, passing through two main luminous states, dominated by either hard or soft X-rays. In the hard state, steady compact jets emitting multiwavelength radiation are present. Those je
Externí odkaz:
https://doaj.org/article/5c9ba6e4387e454aa31dfdf10749be25
Autor:
Dale A. Frail, Emil Polisensky, Scott D. Hyman, William D. Cotton, Namir E. Kassim, Michele L. Silverstein, Rahul Sengar, David L. Kaplan, Francesca Calore, Joanna Berteaud, Maïca Clavel, Marisa Geyer, Samuel Legodi, Vasaant Krishnan, Sarah Buchner, Fernando Camilo
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 34 (2024)
We report on the results of an image-based search for pulsar candidates toward the Galactic bulge. We used mosaic images from the MeerKAT radio telescope that were taken as part of a 173 deg ^2 survey of the bulge and Galactic center of our Galaxy at
Externí odkaz:
https://doaj.org/article/a23f36a0ad824eb581c0b70125d428f3
Autor:
Kierra J. Weatherhead, Jeroen M. Stil, Michael Rugel, Wendy M. Peters, Loren Anderson, Ashley Barnes, Henrik Beuther, Tracy E. Clarke, Sergio A. Dzib, Paul Goldsmith, Karl M. Menten, Kristina E. Nyland, Mattia C. Sormani, James Urquhart
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 92 (2024)
The radio transient ASKAP J173608.2–321635, at the position ( ℓ , b ) = (356.°0872, −0.°0390), was serendipitously observed by The H i /OH/Recombination line survey of the Galactic center at three epochs in 2020 March, 2020 April, and 2021 Fe
Externí odkaz:
https://doaj.org/article/7b6f458f189f4b24b6708ab5d0953b63
Autor:
Amaris V. McCarver, Thomas J. Maccarone, Scott M. Ransom, Tracy E. Clarke, Simona Giacintucci, Wendy M. Peters, Emil Polisensky, Kristina Nyland, Tasha Gautam, Paulo C. C. Freire, Blagoy Rangelov
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 30 (2024)
We present results from a search for pulsars in globular clusters, including the discovery of a new millisecond pulsar in the stellar cluster GLIMPSE-C01. We searched for low-frequency radio sources within 97 globular clusters using images from the V
Externí odkaz:
https://doaj.org/article/baeebdaa4a694a6f994b8e13c0d1abaa
Autor:
Ziteng Wang, David L. Kaplan, Rahul Sengar, Emil Lenc, Andrew Zic, Akash Anumarlapudi, B. M. Gaensler, Natasha Hurley-Walker, Tara Murphy, Yuanming Wang
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 175 (2024)
We report the discovery of a young, highly scattered pulsar in a search for highly circularly polarized radio sources as part of the Australian Square Kilometre Array Pathfinder Variables and Slow Transients survey. In follow-up observations with the
Externí odkaz:
https://doaj.org/article/909314dcc8ef4073a9b20531d24e88bd
Autor:
Marek Sikora, Andrzej A. Zdziarski
Publikováno v:
The Astrophysical Journal Letters, Vol 954, Iss 1, p L30 (2023)
We propose a model explaining the origin of transient/episodic jets in black hole X-ray binaries, in which they are caused by transitions from a collimated, strongly magnetized jet to a wide, uncollimated outflow. The change occurs when the accretion
Externí odkaz:
https://doaj.org/article/4c39bf706b18495b963cd57c48a55c5b
Autor:
Andrzej A. Zdziarski, Alexandra Veledina, Michał Szanecki, David A. Green, Joe S. Bright, David R. A. Williams
Publikováno v:
The Astrophysical Journal Letters, Vol 951, Iss 2, p L45 (2023)
Recently, the accretion geometry of the black hole X-ray binary Cyg X-1 was probed with the X-ray polarization. The position angle of the X-ray-emitting flow was found to be aligned with the position angle of the radio jet in the plane of the sky. At
Externí odkaz:
https://doaj.org/article/e7d8b8895eaf49a0b3ec5b240ad8d4b0
Publikováno v:
The Astrophysical Journal Letters, Vol 947, Iss 2, p L32 (2023)
We model interaction with the surrounding medium of the main discrete jet ejection in the accreting black hole binary MAXI J1348–630. The kinetic energy in the ejection of that jet was estimated before to be >10 ^46 erg. That energy requires that t
Externí odkaz:
https://doaj.org/article/31b668501641457fa07e6036716841ff
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 103 (2023)
Accurate detection of the cosmological 21 cm global signal requires galactic foreground models that can remove power over 10 ^6 . Although foreground and global signal models unavoidably exhibit overlap in their vector spaces inducing bias error in t
Externí odkaz:
https://doaj.org/article/5e7b8bf96dd5495db6b3a00887509fe8
Autor:
Amanda M. Cook, Mohit Bhardwaj, B. M. Gaensler, Paul Scholz, Gwendolyn M. Eadie, Alex S. Hill, Victoria M. Kaspi, Kiyoshi W. Masui, Alice P. Curtin, Fengqiu Adam Dong, Emmanuel Fonseca, Antonio Herrera-Martin, Jane Kaczmarek, Adam E. Lanman, Mattias Lazda, Calvin Leung, Bradley W. Meyers, Daniele Michilli, Ayush Pandhi, Aaron B. Pearlman, Ziggy Pleunis, Scott Ransom, Mubdi Rahman, Ketan R. Sand, Kaitlyn Shin, Kendrick Smith, Ingrid Stairs, David C. Stenning
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 2, p 58 (2023)
The CHIME/FRB project has detected hundreds of fast radio bursts (FRBs), providing an unparalleled population to statistically probe the foreground media that they illuminate. One such foreground medium is the ionized halo of the Milky Way (MW). We e
Externí odkaz:
https://doaj.org/article/5abe1e3535bd4de79d84360f6b0f443b