Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Semionov, D."'
Publikováno v:
Baltic Astronomy 24, 305 (2015)
We study the impact of photometric signal to noise on the accuracy of derived structural parameters of unresolved star clusters using MCMC model fitting techniques. Star cluster images were simulated as a smooth surface brightness distribution follow
Externí odkaz:
http://arxiv.org/abs/1512.08967
Autor:
Narbutis, D., Semionov, D., Stonkutė, R., de Meulenaer, P., Mineikis, T., Bridžius, A., Vansevičius, V.
Publikováno v:
A&A 569, A30 (2014)
Context. An automatic tool to derive structural parameters of semi-resolved star clusters located in crowded stellar fields in nearby galaxies is needed for homogeneous processing of archival frames. Aims. We have developed a program that automatical
Externí odkaz:
http://arxiv.org/abs/1410.2514
We present DART-Ray, a new ray-tracing 3D dust radiative transfer (RT) code designed specifically to calculate radiation field energy density (RFED) distributions within dusty galaxy models with arbitrary geometries. In this paper we introduce the ba
Externí odkaz:
http://arxiv.org/abs/1401.1437
Autor:
Vansevicius, V., Kodaira, K., Narbutis, D., Stonkute, R., Bridzius, A., Deveikis, V., Semionov, D.
Publikováno v:
Astrophys.J.703:1872-1883,2009
We have carried out a survey of compact star clusters (apparent size <3 arcsec) in the southwest part of the M31 galaxy, based on the high-resolution Suprime-Cam images (17.5 arcmin x 28.5 arcmin), covering ~15% of the deprojected galaxy disk area. T
Externí odkaz:
http://arxiv.org/abs/0909.1912
Autor:
Semionov, D., Vansevicius, V.
Publikováno v:
Baltic Astron. 15 (2006) 601-604
We present a program suite for the radiative transfer problem solution in axi-symmetrical dusty galaxy disks, intended primarily for spectrophotometric analysis of stellar populations by means of integrated and differential photometry. The solution i
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701754
We study the effects of dusty spiral arms on the photometric properties of disk galaxies using a series of 2D radiative transfer models, approximating the arms with axially symmetrical rings. We find that dusty arms, as well as dusty disks, have a si
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701753
Autor:
Semionov, D., Vansevicius, V.
We investigate the applicability and accuracy of the iteration scaling approximation, proposed by Kylafis and Bahcall (1987). It is shown, that while this method provides results sufficiently close to the exact solution of radiative transfer problem,
Externí odkaz:
http://arxiv.org/abs/astro-ph/0504614
Autor:
Semionov, D., Vansevicius, V.
We investigate the effects of multiple anisotropic light scattering by interstellar dust particles on photometric profiles of disk galaxy models computed using an iterative ray-tracing radiative transfer modeling code. It is shown that anisotropic sc
Externí odkaz:
http://arxiv.org/abs/astro-ph/0504613
Autor:
Semionov, D., Vansevicius, V.
A new code for evaluation of light absorption and scattering by interstellar dust grains is presented. The radiative transfer problem is solved using ray-tracing algorithm in a self-consistent and highly efficient way. The code demonstrates performan
Externí odkaz:
http://arxiv.org/abs/astro-ph/0501146
Publikováno v:
Open Astronomy, Vol 12, Iss 4, Pp 633-636 (2003)
We present a preliminary study of a fragment of the radial color profile of the spiral galaxy M 31 in terms of 2-D model accounting for internal extinction in the disk. The two stellar population disk model was assumed. The old dust-free disk populat
Externí odkaz:
https://doaj.org/article/0527b7ffa012447fa23b5f163abc89aa
