Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Koljonen, Karri I."'
Autor:
Kouch, Pouya M., Lindfors, Elina, Hovatta, Talvikki, Liodakis, Ioannis, Koljonen, Karri I. I., Nilsson, Kari, Kiehlmann, Sebastian, Max-Moerbeck, Walter, Readhead, Anthony C. S., Reeves, Rodrigo A., Pearson, Timothy J., Jormanainen, Jenni, Ramazani, Vandad Fallah, Graham, Matthew J.
Publikováno v:
A&A 690, A111 (2024)
The origin of high-energy (HE) astrophysical neutrinos has remained an elusive hot topic in the field of HE astrophysics for the past decade. Apart from a handful of individual associations, the vast majority of HE neutrinos arise from unknown source
Externí odkaz:
http://arxiv.org/abs/2407.07153
Blazars constitute the most numerous source class in the known extragalactic population of very high energy (VHE) gamma-ray sources. However, determining their redshifts is often challenging due to weak or non-existent emission lines in their spectra
Externí odkaz:
http://arxiv.org/abs/2406.13786
Autor:
Koljonen, Karri I. I., Liodakis, Ioannis, Lindfors, Elina, Nilsson, Kari, Reynolds, Thomas M., Charalampopoulos, Panos, Kouroumpatzakis, Konstantinos, McCall, Callum, Jermak, Helen E., Steele, Iain A., Carbajo-Hijarrubia, Juan
Supermassive black holes disrupt passing stars, producing outbursts called tidal disruption events (TDEs). TDEs have recently gained attention due to their unique dynamics and emission processes, which are still not fully understood. Especially, the
Externí odkaz:
http://arxiv.org/abs/2403.04877
Autor:
Koljonen, Karri I. I., Lindseth, Sindre S., Linares, Manuel, Harding, Alice K., Turchetta, Marco
Radio emission from pulsars can be used to map out their distances through dispersion measure (DM), which quantifies the amount of radio pulse dispersion. However, this method relies on accurately modelling the free electron density in the line of si
Externí odkaz:
http://arxiv.org/abs/2402.09010
Autor:
Echiburú-Trujillo, Constanza, Tetarenko, Alexandra J., Haggard, Daryl, Russell, Thomas D., Koljonen, Karri I. I., Bahramian, Arash, Wang, Jingyi, Bremer, Michael, Bright, Joe, Casella, Piergiorgio, Russell, David M., Altamirano, Diego, Baglio, M. Cristina, Belloni, Tomaso, Ceccobello, Chiara, Corbel, Stephane, Trigo, Maria Diaz, Maitra, Dipankar, Gabuya, Aldrin, Gallo, Elena, Heinz, Sebastian, Homan, Jeroen, Kara, Erin, Körding, Elmar, Lewis, Fraser, Lucchini, Matteo, Markoff, Sera, Migliari, Simone, Miller-Jones, James C. A., Rodriguez, Jerome, Saikia, Payaswini, Sarazin, Craig L., Shahbaz, Tariq, Sivakoff, Gregory, Soria, Roberto, Testa, Vincenzo, Tetarenko, Bailey E., Tudose, Valeriu
Publikováno v:
2024 ApJ 962 116
Black hole X-ray binaries (BH XRBs) are ideal targets to study the connection between accretion inflow and jet outflow. Here we present quasi-simultaneous, multi-wavelength observations of the Galactic black hole system MAXI J1820+070, throughout its
Externí odkaz:
http://arxiv.org/abs/2311.11523
Autor:
Koljonen, Karri I. I., Linares, Manuel
In this paper, we study compact binary millisecond pulsars with low- and very low-mass companion stars (spiders) in the Galactic field, using data from the latest Gaia data release (DR3). We infer the parallax distances of the optical counterparts to
Externí odkaz:
http://arxiv.org/abs/2308.07377
The origin of astrophysical neutrinos is one of the most debated topics today. Perhaps the most robust evidence of neutrino counterpart comes from supermassive black holes in active galactic nuclei associated with strongly collimated outflows, or jet
Externí odkaz:
http://arxiv.org/abs/2306.11804
Publikováno v:
A&A 649, A176 (2021)
The radiatively driven wind of the primary star in wind-fed X-ray binaries can be suppressed by the X-ray irradiation of the compact secondary star. This causes feedback between the wind and the X-ray luminosity of the compact star. We estimated how
Externí odkaz:
http://arxiv.org/abs/2104.02305
GRS 1915+105 is a transient black hole X-ray binary consistently emitting 10-100% of the Eddington luminosity in the X-ray band during the last three decades until mid-2018 when the source luminosity suddenly decreased by an order of magnitude. This
Externí odkaz:
http://arxiv.org/abs/2102.00693
Publikováno v:
A&A 639, A13 (2020)
V404 Cyg, Cyg X-3, V4641 Sgr, and GRS 1915+105 are among the brightest X-ray binaries and display complex behavior in their multiwavelength emission. Apart from Cyg X-3, the other three sources have large accretion disks, and there is evidence of a h
Externí odkaz:
http://arxiv.org/abs/2004.08536