Zobrazeno 1 - 10
of 171
pro vyhledávání: '"Koljonen, K"'
The optical emission line spectra of X-ray binaries (XRBs) are thought to be produced in an irradiated atmosphere, possibly the base of a wind, located above the outer accretion disc. However, the physical nature of - and physical conditions in - the
Externí odkaz:
http://arxiv.org/abs/2303.09242
Autor:
Liodakis, I., Koljonen, K. I. I., Blinov, D., Lindfors, E., Alexander, K. D., Hovatta, T., Berton, M., Hajela, A., Jormanainen, J., Kouroumpatzakis, K., Mandarakas, N., Nilsson, K.
Supermassive black holes have been known to disrupt passing stars producing outbursts called Tidal Disruption Events offering a unique view on the early stages of accretion disk and jet formation. The advent of large scale optical time-domain surveys
Externí odkaz:
http://arxiv.org/abs/2208.14465
Autor:
Panizo-Espinar, G., Padilla, M. Armas, Muñoz-Darias, T., Koljonen, K. I. I., Cúneo, V. A., Sánchez-Sierras, J., Sánchez, D. Mata, Casares, J., Corral-Santana, J., Fender, R. P., Jiménez-Ibarra, F., Ponti, G., Steeghs, D., Torres, M. A. P.
Publikováno v:
A&A 664, A100 (2022)
MAXI J1348-630 is a low mass X-ray binary discovered in 2019 during a bright outburst. During this event, the system sampled both hard and soft states following the standard evolution. We present multi-epoch optical and near-infrared spectroscopy obt
Externí odkaz:
http://arxiv.org/abs/2205.09128
Autor:
Egron, E., Pellizzoni, A., Righini, S., Giroletti, M., Koljonen, K., Pottschmidt, K., Trushkin, S., Lobina, J., Pilia, M., Wilms, J., Corbel, S., Grinberg, V., Loru, S., Trois, A., Rodriguez, J., Lähteenmäki, A., Tornikoski, M., Enestam, S., Järvelä, E.
The microquasar Cygnus X-3 underwent a giant radio flare in April 2017, reaching a maximum flux of $\sim 16.5$ Jy at 8.5 GHz. We present results from a long monitoring campaign carried out with Medicina at 8.5, 18.6 and 24.1 GHz, in parallel to the M
Externí odkaz:
http://arxiv.org/abs/2010.15002
Autor:
Russell, T. D., Lucchini, M., Tetarenko, A. J., Miller-Jones, J. C. A., Sivakoff, G. R., Krauß, F., Mulaudzi, W., Baglio, M. C., Russell, D. M., Altamirano, D., Ceccobello, C., Corbel, S., Degenaar, N., Eijnden, J. van den, Fender, R., Heinz, S., Koljonen, K. I. I., Maitra, D., Markoff, S., Migliari, S., Parikh, A. S., Plotkin, R. M., Rupen, M., Sarazin, C., Soria, R., Wijnands, R.
We present results from six epochs of quasi-simultaneous radio, (sub-)millimetre, infrared, optical, and X-ray observations of the black hole X-ray binary MAXI~J1535$-$571. These observations show that as the source transitioned through the hard-inte
Externí odkaz:
http://arxiv.org/abs/2008.11216
Autor:
Zhang, Guobao, Bernardini, F., Russell, D. M., Gelfand, J. D., Lasota, J. -P., Qasim, A. Al, AlMannaei, A., Koljonen, K. I. I., Shaw, A. W., Lewis, F., Tomsick, J. A., Plotkin, R. M., Miller-Jones, J. C. A., Maitra, D., Homan, J., Charles, P. A., Kobel, P., Perez, D., Doran, R.
We present optical, UV and X-ray monitoring of the short orbital period black hole X-ray binary candidate Swift J1753.5-0127, focusing on the final stages of its 12$-$year long outburst that started in 2005. From September 2016 onward, the source sta
Externí odkaz:
http://arxiv.org/abs/1903.09455
Autor:
Kallman, T., McCollough, M., Corrales, L., Koljonen, K., Liedahl, D., Miller, J., Paerels, F., Pooley, G., Sako, M., Schulz, N., Trushkin, S.
We present model fits to the X-ray line spectrum of the well known High Mass X-ray binary Cyg X-3. The primary observational dataset is a spectrum taken with the $Chandra$ X-ray Observatory High Energy Transmission Grating (HETG) in 2006, though we c
Externí odkaz:
http://arxiv.org/abs/1902.05589
Autor:
Baglio, M. C., Russell, D. M., Casella, P., Noori, H. Al, Yazeedi, A. Al, Belloni, T., Buckley, D. A. H., Bel, M. Cadolle, Ceccobello, C., Corbel, S., Zelati, F. Coti, Trigo, M. Diaz, Fender, R. P., Gallo, E., Gandhi, P., Homan, J., koljonen, K. I. I., lewis, F., Maccarone, T. J., Malzac, J., Markoff, S., Miller-Jones, J. C. A., O'Brien, K., Russell, T. D., Saikia, P., Shahbaz, T., Sivakoff, G. R., Soria, R., Testa, V., Tetarenko, A. J., Ancker, M. E. van den, Vincentelli, F. M.
We report on the results of optical, near-infrared (NIR) and mid-infrared observations of the black hole X-ray binary candidate (BHB) MAXI J1535-571 during its 2017/2018 outburst. During the first part of the outburst (MJD 58004-58012), the source sh
Externí odkaz:
http://arxiv.org/abs/1807.08762
Autor:
Koljonen, K. I. I., Maccarone, T., McCollough, M. L., Gurwell, M., Trushkin, S. A., Pooley, G. G., Piano, G., Tavani, M.
Publikováno v:
A&A 612, A27 (2018)
Cygnus X-3 is a unique microquasar in the Galaxy hosting a Wolf-Rayet companion orbiting a compact object that most likely is a low-mass black hole. The unique source properties are likely due to the interaction of the compact object with the heavy s
Externí odkaz:
http://arxiv.org/abs/1712.07933
Thermonuclear (type-I) X-ray bursts, observed from neutron star (NS) low-mass X-ray binaries (LMXB), provide constraints on NS masses and radii and consequently the equation of state of NS cores. In such analyses various assumptions are made without
Externí odkaz:
http://arxiv.org/abs/1707.09479