Zobrazeno 1 - 10
of 2 056
pro vyhledávání: '"A Kniazev"'
We have fulfilled a detailed long-slit spectroscopic analysis for two SB0 galaxies -- NGC 1533 and NGC 1543, -- belonging to the Dorado group. Our spectral data reveal asymmetric decoupled kinematics of the stars and ionised gas in these barred lenti
Externí odkaz:
http://arxiv.org/abs/2405.15363
Autor:
Mishenina, T., Pignatari, M., Usenko, I., Soubiran, C., Thielemann, F. -K., Kniazev, A. Yu., Korotin, S. A., Gorbaneva, T.
The oldest stars in the Milky Way are metal-poor with [Fe/H] < -- 1.0, displaying peculiar elemental abundances compared to solar values. The relative variations in the chemical compositions among stars is also increasing with decreasing stellar meta
Externí odkaz:
http://arxiv.org/abs/2405.11234
The purpose of this work is to spectroscopically analyse the classical Cepheid V708 Car. A preliminary check of the spectrum of V708 Car showed that this is a lithium-rich supergiant. We also found that V708 Car has an unusual chemical composition in
Externí odkaz:
http://arxiv.org/abs/2402.13072
This paper presents the results of analysing the integrated light (IL) low-resolution spectra of globular clusters (GCs) in the M31 and Centaurus A groups of galaxies. The sample consists of eight very metal-poor GCs ($\rm [Fe/H]\le -2$ dex) with hig
Externí odkaz:
http://arxiv.org/abs/2402.05922
Autor:
Gerasimov, Ivan S., Egorov, Oleg . V., Moiseev, Alexei V., Kniazev, Alexei Yu., Lozinskaya, Tatiana A., Egorova, Evgeniya S.
We investigated the ionised and atomic gas kinematics and excitation state in the central region of ongoing star formation of the nearby low-metallicity dwarf galaxy Sextans B. The analysis is based on the new observations performed in Ha emission li
Externí odkaz:
http://arxiv.org/abs/2402.03027
We present the results of the spectroscopic study of a chemically peculiar star HD 152564. Using medium-resolution ($R=37000$) observations obtained with the HRS spectrograph mounted on the South African Large Telescope we determined atmospheric para
Externí odkaz:
http://arxiv.org/abs/2312.09594
In the framework of the ongoing project, aimed at the systematical studying galaxies in nearby voids, we conducted spectroscopy with the Southern African Large Telescope (SALT) of 62 objects from the Nearby Void Galaxy (NVG) sample. They include 8 re
Externí odkaz:
http://arxiv.org/abs/2312.07815
In recent years, several authors have been investigating simplicial models, a model of epistemic logic based on higher-dimensional structures called simplicial complexes. In the original formulation, simplicial models were always assumed to be pure,
Externí odkaz:
http://arxiv.org/abs/2311.01351
Autor:
Shara, Michael M., Lanzetta, Kenneth M., Garland, James T., Gromoll, Stefan, Valls-Gabaud, David, Walter, Frederick M., Webb, John K., Kniazev, Alexei, Townsend, Lee, Darnley, Matthew J., Healy-Kalesh, Michael, Corral-Santana, Jesus, Schmidtobreick, Linda
Just 10 recurrent novae (RNe) - which erupt repeatedly on timescales shorter than one century - are known in our Galaxy. The most extreme RN known (located in the Andromeda galaxy), M31N 2008-12a, undergoes a nova eruption every year, and is surround
Externí odkaz:
http://arxiv.org/abs/2310.17055
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