Zobrazeno 1 - 10
of 315
pro vyhledávání: '"Mikolajewska, J."'
Autor:
Aydi, E., Chomiuk, L., Strader, J., Sokolovsky, K. V., Williams, R. E., Buckley, D. A. H., Ederoclite, A., Izzo, L., Kyer, R., Linford, J. D., Kniazev, A., Metzger, B. D., Mikolajewska, J., Molaro, P., Mollina, I., Mukai, K., Munari, U., Orio, M., Panurach, T., Shappee, B. J., Shen, K. J., Sokoloski, J. L., Urquhart, R., Walter, F. M.
The optical spectra of novae are characterized by emission lines from the hydrogen Balmer series and either Fe II or He/N, leading to their traditional classification into two spectral classes: "Fe II" and "He/N". For decades, the origins of these sp
Externí odkaz:
http://arxiv.org/abs/2309.07097
Autor:
Magdolen, J., Dobrotka, A., Orio, M., Mikołajewska, J., Vanderburg, A., Monard, B., Aloisi, R., Bezák, P.
Publikováno v:
A&A 675, A140 (2023)
AIMS: We investigated the optical variability of the symbiotic binary FN Sgr, with photometric monitoring during $\simeq$55 years and with a high-cadence Kepler light curve lasting 81 days. METHODS: The data obtained in the V and I bands were reduced
Externí odkaz:
http://arxiv.org/abs/2306.05095
Autor:
Aydi, E., Chomiuk, L., Mikołajewska, J., Brink, J., Metzger, B. D., Strader, J., Buckley, D. A. H., Harvey, E. J., Holoien, T. W. -S., Izzo, L., Kawash, A., Linford, J. D., Molaro, P., Mollina, B., Mróz, P., Mukai, K., Orio, M., Panurach, T., Senchyna, P., Shappee, B. J., Shen, K. J., Sokoloski, J. L., Sokolovsky, K. V., Urquhart, R., Williams, R. E.
We present early spectral observations of the very slow Galactic nova Gaia22alz, over its gradual rise to peak brightness that lasted 180 days. During the first 50 days, when the nova was only 3--4 magnitudes above its normal brightness, the spectra
Externí odkaz:
http://arxiv.org/abs/2304.04306
Autor:
Orio, M., Gendreau, K., Giese, M., Luna, J. G. M., Magdolen, J., Pei, S., Sun, B., Behar, E., Dobrotka, A., Mikolajewska, J., Pasham, D. R., Strohmayer, T. E.
We monitored four supersoft sources - two persistent ones, CAL 83 and MR Vel, and the recent novae YZ Ret (Nova Ret 2020) and V1674 Her (Nova Her 2021) - with NICER. The two persistent SSS were observed with unvaried X-ray flux level and spectrum, re
Externí odkaz:
http://arxiv.org/abs/2204.01660
Autor:
Bujarrabal, V., Agundez, M., Gomez-Garrido, M., Kim, Hyosun, Santander-Garcia, M., Alcolea, J., Castro-Carrizo, A., Mikolajewska, J.
Publikováno v:
A&A 651, A4 (2021)
We investigate the structure, dynamics, and chemistry of the molecule-rich nebula around the stellar symbiotic system R Aqr, which is significantly affected by the presence of a white dwarf (WD) companion. We study the effects of the strong dynamical
Externí odkaz:
http://arxiv.org/abs/2105.07687
Autor:
Mikolajewska, J., Ilkiewicz, K., Galan, C., Monard, B., Otulakowska-Hypka, M., Shara, M. M., Udalski, A.
We present and analyze optical photometry and high resolution SALT spectra of the symbiotic recurrent nova V3890 Sgr at quiescence. The orbital period, P=747.6 days has been derived from both photometric and spectroscopic data. Our double-line spectr
Externí odkaz:
http://arxiv.org/abs/2104.06218
Autor:
Merc, J., Mikołajewska, J., Gromadzki, M., Gałan, C., Iłkiewicz, K., Skowron, J., Wyrzykowski, Ł., Hodgkin, S. T., Rybicki, K. A., Zieliński, P., Kruszyńska, K., Godunova, V., Simon, A., Reshetnyk, V., Lewis, F., Kolb, U., Morrell, M., Norton, A. J., Awiphan, S., Poshyachinda, S., Reichart, D. E., Greet, M., Kolgjini, J.
Publikováno v:
A&A 644, A49 (2020)
Besides the astrometric mission of the Gaia satellite, its repeated and high-precision measurements serve also as an all-sky photometric transient survey. The sudden brightenings of the sources are published as Gaia Photometric Science Alerts and are
Externí odkaz:
http://arxiv.org/abs/2009.14709
Autor:
Stoyanov, K. A., Iłkiewicz, K., Luna, G. J. M., Mikołajewska, J., Mukai, K., Martí, J., Latev, G., Boeva, S., Zamanov, R. K.
We performed high-resolution optical spectroscopy and X-ray observations of the recently identified Mira-type symbiotic star EF Aql. Based on high-resolution optical spectroscopy obtained with SALT, we determine the temperature ($\sim $55 000 K) and
Externí odkaz:
http://arxiv.org/abs/2005.03379
Barium stars are thought to result from binary evolution in systems wide enough to allow the more massive component to reach the asymptotic giant branch and eventually become a CO white dwarf. While Ba stars were initially known only among giant or s
Externí odkaz:
http://arxiv.org/abs/2001.11319
The substantial number of binary central stars of planetary nebulae (CSPNe) now known ($\sim$50) has revealed a strong connection between binarity and some morphological features including jets and low-ionisation structures. However, some features an
Externí odkaz:
http://arxiv.org/abs/1908.08724