Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Gontcharov, George"'
Autor:
Marchuk, Alexander A., Chugunov, Ilia V., Gontcharov, George A., Mosenkov, Aleksandr V., Ilin, Vladimir B., Savchenko, Sergey S., Smirnov, Anton A., Poliakov, Denis M., Seguine, Jonah, Chazov, Maxim I.
Spiral structure can contribute significantly to a galaxy's luminosity. However, only rarely are proper photometric models of spiral arms used in decompositions. As we show in the previous work, including the spirals as a separate component in a phot
Externí odkaz:
http://arxiv.org/abs/2402.08531
Autor:
Gontcharov, George A., Bonatto, Charles J., Ryutina, Olga S., Savchenko, Sergey S., Mosenkov, Aleksandr V., Il'in, Vladimir B., Khovritchev, Maxim Yu., Marchuk, Alexander A., Poliakov, Denis M., Smirnov, Anton A., Seguine, Jonah
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 2023, Volume 526, Issue 4, pp. 5628-5647
We fit various colour-magnitude diagrams (CMDs) of the Galactic globular clusters NGC\,6397 and NGC\,6809 (M55) by isochrones from the Dartmouth Stellar Evolution Database (DSED) and Bag of Stellar Tracks and Isochrones (BaSTI) for $\alpha$-enhanced
Externí odkaz:
http://arxiv.org/abs/2402.06524
Autor:
Savchenko, Sergey, Poliakov, Denis, Mosenkov, Aleksandr, Smirnov, Anton, Marchuk, Alexander, Il'in, Vladimir, Gontcharov, George, Seguine, Jonah, Baes, Maarten
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 524, Issue 3, pp.4729-4745 (2023)
The presence of dust in spiral galaxies affects the ability of photometric decompositions to retrieve the parameters of their main structural components. For galaxies in an edge-on orientation, the optical depth integrated over the line-of-sight is s
Externí odkaz:
http://arxiv.org/abs/2309.06257
Autor:
Smirnov, Anton A., Savchenko, Sergey S., Poliakov, Denis M., Marchuk, Alexander A., Mosenkov, Aleksandr V., Ilin, Vladimir B., Gontcharov, George A., Roman, Javier, Seguine, Jonah
The presence of Galactic cirrus is an obstacle for studying both faint objects in our Galaxy and low surface brightness extragalactic structures. With the aim of studying individual cirrus filaments in SDSS Stripe 82 data, we develop techniques based
Externí odkaz:
http://arxiv.org/abs/2301.12410
Autor:
Gontcharov, George A., Khovritchev, Maxim Yu., Mosenkov, Aleksandr V., Il'in, Vladimir B., Marchuk, Alexander A., Poliakov, Denis M., Ryutina, Olga S., Savchenko, Sergey S., Smirnov, Anton A., Usachev, Pavel A., Lee, Jae-Woo, Camacho, Conner, Hebdon, Noah
We present new isochrone fits to the colour-magnitude diagrams of the Galactic globular clusters NGC\,6362 and NGC\,6723. We utilize 22 and 26 photometric filters for NGC\,6362 and NGC\,6723, respectively, from the ultraviolet to mid-infrared using d
Externí odkaz:
http://arxiv.org/abs/2211.12684
Autor:
Mosenkov, Aleksandr V., Usachev, Pavel A., Shakespear, Zacory, Guerrette, Jacob, Baes, Maarten, Bianchi, Simone, Xilouris, Emmanuel M., Gontcharov, George A., Il'in, Vladimir B., Marchuk, Alexander A., Savchenko, Sergey S., Smirnov, Anton A.
In this first paper in a series we present a study of the global dust emission distribution in nearby edge-on spiral galaxies. Our sample consists of 16 angularly large and 13 less spatially resolved galaxies selected from the DustPedia sample. To ex
Externí odkaz:
http://arxiv.org/abs/2207.11589
Autor:
Marchuk, Alexander A., Smirnov, Anton A., Mosenkov, Aleksandr V., Ilín, Vladimir B., Gontcharov, George A., Savchenko, Sergey S., Román, Javier
The geometric characteristics of dust clouds provide important information on the physical processes that structure such clouds. One of such characteristics is the $2D$ fractal dimension $D$ of a cloud projected onto the sky plane. In previous studie
Externí odkaz:
http://arxiv.org/abs/2109.14034
Autor:
Gontcharov, George A., Khovritchev, Maxim Yu., Mosenkov, Aleksandr V., Il'in, Vladimir B., Marchuk, Alexander A., Savchenko, Sergey S., Smirnov, Anton A., Usachev, Pavel A., Poliakov, Denis M.
We present new isochrone fits to colour-magnitude diagrams of the Galactic globular clusters NGC\,288, NGC\,362, and NGC\,6218 (M12). We utilize a lot of photometric bands from the ultraviolet to mid-infrared by use of data from the {\it HST}, {\it G
Externí odkaz:
http://arxiv.org/abs/2109.13115
We exploit a complete sample of 101\,810 {\it Gaia} DR2 giants, selected in Paper I in the space cylinder with a radius of 700 pc around the Sun and a height of $|Z|=1800$ pc, using the {\it Gaia} DR2 parallaxes, $G_\mathrm{BP}$ and $G_\mathrm{RP}$ p
Externí odkaz:
http://arxiv.org/abs/2011.13811
We consider a complete sample of 101810 giants with Gaia DR2 parallaxes $\varpi$ within the red clump domain of the Hertzsprung-Russell diagram in the space cylinder with a radius of 700 pc around the Sun and a height of $|Z|=1800$ pc. We use the Gai
Externí odkaz:
http://arxiv.org/abs/2011.11113