Zobrazeno 1 - 10
of 518
pro vyhledávání: '"Segura, N"'
Autor:
Veresvarska, M., Scaringi, S., Knigge, C., Paice, J., Buckley, D. A. H., Segura, N. Castro, de Martino, D., Groot, P. J., Ingram, A., Irving, Z. A., Szkody, P.
Almost all accreting black hole and neutron star X-ray binary systems (XRBs) exhibit prominent brightness variations on a few characteristic time-scales and their harmonics. These quasi-periodic oscillations (QPOs) are thought to be associated with t
Externí odkaz:
http://arxiv.org/abs/2410.01896
Autor:
Kennedy, M. R., Callanan, P., Garnavich, P. M., Breton, R. P., Brown, A. J., Segura, N. Castro, Dhillon, V. S., Dyer, M. J., Garbutt, J., Green, M. J., Hakala, P., Jiminez-Ibarra, F., Kerry, P., Fijma, S., Littlefair, S., Munday, J., Mason, P. A., Mata-Sanchez, D., Munoz-Darias, T., Parsons, S., Pelisoli, I., Sahman, D.
UW Coronae Borealis (UW CrB) is a low mass X-ray binary that shows both Type 1 X-ray and optical bursts, which typically last for 20 s. The system has a binary period of close to 2 hours and is thought to have a relatively high inclination due to the
Externí odkaz:
http://arxiv.org/abs/2408.06404
Autor:
Gandhi, P., Borowski, E. S., Byrom, J., Hynes, R. I., Maccarone, T. J., Shaw, A. W., Adegoke, O. K., Altamirano, D., Baglio, M. C., Bhargava, Y., Britt, C. T., Buckley, D. A. H., Buisson, D. J. K., Casella, P., Segura, N. Castro, Charles, P. A., Corral-Santana, J. M., Dhillon, V. S., Fender, R., Gúrpide, A., Heinke, C. O., Igl, A. B., Knigge, C., Markoff, S., Mastroserio, G., McCollough, M. L., Middleton, M., Miller, J. M., Miller-Jones, J. C. A., Motta, S. E., Paice, J. A., Pawar, D. D., Plotkin, R. M., Pradhan, P., Ressler, M. E., Russell, D. M., Russell, T. D., Santos-Sanz, P., Shahbaz, T., Sivakoff, G. R., Steeghs, D., Tetarenko, A. J., Tomsick, J. A., Vincentelli, F. M., George, M., Gurwell, M., Rao, R.
We present mid-infrared (MIR) spectral-timing measurements of the prototypical Galactic microquasar GRS 1915+105. The source was observed with the Mid-Infrared Instrument (MIRI) onboard JWST in June 2023 at a MIR luminosity L(MIR)~10^{36} erg/s excee
Externí odkaz:
http://arxiv.org/abs/2406.18637
Autor:
Paice, John A., Scaringi, S., Segura, N. Castro, Sahu, A., Ilkiewicz, K., Coppejans, Deanne L., De Martino, D., Knigge, C., Veresvarska, M.
We report on spin variations in the intermediate polar and cataclysmic variable CC Scl, as seen by the Transiting Exoplanet Survey Satellite (TESS). By studying both the spin period and its harmonic, we find that the spin has varied since it was firs
Externí odkaz:
http://arxiv.org/abs/2405.05127
Autor:
Podgorný, J., Svoboda, J., Dovčiak, M., Veledina, A., Poutanen, J., Kaaret, P., Bianchi, S., Ingram, A., Capitanio, F., Datta, S. R., Egron, E., Krawczynski, H., Matt, G., Muleri, F., Petrucci, P. -O., Russell, T. D., Steiner, J. F., Bollemeijer, N., Brigitte, M., Segura, N. Castro, Emami, R., García, J. A., Hu, K., Iacolina, M. N., Kravtsov, V., Marra, L., Mastroserio, G., Muñoz-Darias, T., Nathan, E., Negro, M., Ratheesh, A., Cavero, N. Rodriguez, Taverna, R., Tombesi, F., Yang, Y. J., Zhang, W., Zhang, Y.
Publikováno v:
A&A 686, L12 (2024)
We report on the detection of X-ray polarisation in the black-hole X-ray binary Swift J1727.8$-$1613 during its dim hard spectral state by the Imaging X-ray Polarimetry Explorer (IXPE). This is the first detection of X-ray polarisation at the transit
Externí odkaz:
http://arxiv.org/abs/2404.19601
Autor:
Segura, N. Castro, Knigge, C., Matthews, J. H., Vincentelli, F. M., Charles, P., Long, K. S., Altamirano, D., Buckley, D. A. H., Modiano, D., Torres, M. A. P., Buisson, D. J. K., Fijma, S., Alabarta, K., Degenaar, N., Georganti, M., Baglio, M. C.
The evolution of accreting X-ray binary systems is closely coupled to the properties of their donor stars. As a result, we can constrain the evolutionary track a system is by establishing the nature of its donor. Here, we present far-UV spectroscopy
Externí odkaz:
http://arxiv.org/abs/2310.03397
Autor:
Otero-Santos, J., Acosta-Pulido, J. A., González, J. Becerra, Raiteri, C. M., Carnerero, M. I., Segura, N. Castro, González-Martín, O., Luashvili, A.
We present a polarization variability analysis of a sample of 26 $\gamma$-ray blazars monitored by the Steward Observatory between 2008 and 2018 in the optical band. We investigate the properties and long-term variability of their optical polarizatio
Externí odkaz:
http://arxiv.org/abs/2306.03919
Autor:
Fijma, S., Segura, N. Castro, Degenaar, N., Knigge, C., Higginbottom, N., Santisteban, J. V. Hernández, Maccarone, T. J.
Accreting low mass X-ray binaries (LMXBs) are capable of launching powerful outflows such as accretion disc winds. In disc winds, vast amounts of material can be carried away, potentially greatly impacting the binary and its environment. Previous stu
Externí odkaz:
http://arxiv.org/abs/2305.10793
Autor:
Wiseman, P., Wang, Y., Hönig, S., Castro-Segura, N., Clark, P., Frohmaier, C., Fulton, M. D., Leloudas, G., Middleton, M., Müller-Bravo, T. E., Mummery, A., Pursiainen, M., Smartt, S. J., Smith, K., Sullivan, M., Anderson, J. P., Pulido, J. A. Acosta, Charalampopoulos, P., Banerji, M., Dennefeld, M., Galbany, L., Gromadzki, M., Gutiérrez, C. P., Ihanec, N., Kankare, E., Lawrence, A., Mockler, B., Moore, T., Nicholl, M., Onori, F., Petrushevska, T., Ragosta, F., Rest, S., Smith, M., Wevers, T., Carini, R., Chen, T. -W., Chambers, K., Gao, H., Huber, M., Inserra, C., Magnier, E., Makrygianni, L., Toy, M., Vincentelli, F., Young, D. R.
We present observations from X-ray to mid-infrared wavelengths of the most energetic non-quasar transient ever observed, AT2021lwx. Our data show a single optical brightening by a factor $>100$ to a luminosity of $7\times10^{45}$ erg s$^{-1}$, and a
Externí odkaz:
http://arxiv.org/abs/2303.04412
Autor:
Vincentelli, F. M., Neilsen, J., Tetarenko, A. J., Cavecchi, Y., Segura, N. Castro, del Palacio, S., Eijnden, J. van den, Vasilopoulos, G., Altamirano, D., Padilla, M. Armas, Bailyn, C. D., Belloni, T., Buisson, D. J. K., Cuneo, V. A., Degenaar, N., Knigge, C., Long, K. S., Jimenez-Ibarra, F., Milburn, J., Darias, T. Muñoz, Arabaci, M. Ozbey, Remillard, R., Russell, T.
Accretion disks around compact objects are expected to enter an unstable phase at high luminosity. One instability may occur when the radiation pressure generated by accretion modifies the disk viscosity, resulting in the cyclic depletion and refilli
Externí odkaz:
http://arxiv.org/abs/2303.00020