I. B. Vavilova

National Academy of Sciences of Ukraine

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D. V. Dobrycheva

Main Astronomical Observatory

A. Elyiv

Main Astronomical Observatory

ОV

О. V. Мelnyk

Institute of Physics

Iu. Babyk

Center for Astrophysics Harvard & Smithsonian

L. K. Pakuliak

Main Astronomical Observatory

Ya. S. Yatskiv

Main Astronomical Observatory

V. E. Karachentseva

Main Astronomical Observatory

Yu. I. Protsyuk

Mykolaiv Observatory

M. Yu. Vasylenko

National Academy of Sciences of Ukraine

A. A. Vasylenko

National Academy of Sciences of Ukraine

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National Academy of Sciences of Ukraine

129

Main Astronomical Observatory

Institute of Radio Astronomy

Taras Shevchenko National University of Kyiv

Astronomical Observatory

V. N. Karazin Kharkiv National University

Russian Academy of Sciences

Crimean Astrophysical Observatory

Centre National de la Recherche Scientifique

Institute of Astronomy

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Voronoi tessellation for galaxy distribution

I. B. Vavilova О. Melnyk

Centroidal Voronoi tessellation

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Citations (3)

General Relativity Theory: Tests through Time

IAU Joint Discussion (2006)

Ya. S. Yatskiv A. N. Alexandrov I. B. Vavilova В. И. Жданов Yu. N. Kudrya

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The beginnings of decameter radio astronomy: pioneering works of Semen Ya. Braude and his followers in Ukraine

Astronomische Nachrichten (2007)

I. B. Vavilova А. А. Коноваленко A. V. Megn

Abstract S.Ya. Braude (1911–2003) was the well‐known radio astronomer, one of the founders of low‐frequency astronomical research in the world, in particular in the former Soviet Union. He began to work in this field of science in 1957, in Kharkiv city (Ukraine), from the design and manufacturing small decameter interferometer ID‐1 and ID‐2. Since that time Braude and his team have developed more sophisticated radio decameter telescopes as UTR‐1 and UTR‐2 (the largest in the world till now) as well as the first decameter VLBI network URAN. They have obtained some important pioneering results about low‐frequency radio emission of objects in our Solar system, Galaxy and Metagalaxy by means of these telescopes. In this paper the key events of early history of decameter radio astronomy research in the former USSR are mentioned with emphasizing the role of S. Braude. For the period of 1957–1962, the quotations of Braude's Personal Diary (2003) are first laying open to the public. The most important results obtained by S.Ya. Braude and his followers as well as perspectives of decameter radio astronomy in Ukraine and in the world are highlighted briefly. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Radio Astronomy

Astronomer

Very-long-baseline interferometry

10.1002/asna.200710762

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Radio properties of the low-redshift isolated galaxies with active nuclei

Kinematika i fizika nebesnyh tel (Online) (2023)

N. G. Pulatova I. B. Vavilova A. A. Vasylenko O. M. Ulyanov

Âëàñòèâîñò³ ³çîëüîâàíèõ ãàëàêòèê ³ç àêòèâíèìè ÿäðàìè íà z < 0.05 ó ðàä³îä³àïàçîí³Ìåòà ðîáîòè.Äîñë³äaeóþòüñÿ âëàñòèâîñò³ 61 ³çîëüîâàíî¿ ãà ëàê òèêè ç àêòèâíèìè ÿäðàìè (³çîëüîâàí³ ÀßÃ) â ðàä³îä³àïàçîí³ íà ÷åðâî íèõ çì³ùåííÿõ z < 0.05.Âèá³ðêó áóëî îòðèìàíî øëÿõîì ïåðåõðåñíî¿ êîðåëÿö³¿ êàòàëîãó 2MIG (êàòàëîã ³çîëüîâàíèõ ãàëàêòèê íà áàç³ îãëÿäó íåáà 2MASS) ³ç êàòàëîãîì êâàçàð³â/ÀßÃ Veron-Cetty ³ îáìåaeåíà çà çîðÿíîþ âåëè÷èíîþ 4 m < K s £ 12 m , ïðîìåíåâîþ øâèäê³ñòþ V r < < 15 000 êì/ñ òà â³äñòàííþ äî íàéáëèae÷î¿ çíà÷èìî¿ ãàëàêòèêè.Ö³ îáìåaeåííÿ ñâ³ä÷àòü, ùî ³çîëüîâàí³ ÀßÃ íå ìàëè ç³òêíåíü

Red shift

10.15407/kfnt2023.02.047

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The struve dynasty in the history of astronomy in Ukraine

Kinematics and Physics of Celestial Bodies (2009)

T. G. Artemenko Marat Balyshev I. B. Vavilova

10.3103/s0884591309030040

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High-order 3D Voronoi tessellation for identifying isolated galaxies, pairs and triplets

Monthly Notices of the Royal Astronomical Society (2009)

A. Elyiv О. Melnyk I. B. Vavilova

Geometric method based on the high-order 3D Voronoi tessellation is proposed for identifying the single galaxies, pairs and triplets. This approach allows to select small galaxy groups and isolated galaxies in different environment and find the isolated systems. The volume-limited sample of galaxies from the SDSS DR5 spectroscopic survey was used. We conclude that in such small groups as pairs and triplets the segregation by luminosity is clearly observed: galaxies in the isolated pairs and triplets are on average two times more luminous than isolated galaxies. We consider the dark matter content in different systems. The median values of mass-to-luminosity ratio are 12 M_sol/L_sol for the isolated pairs and 44 M_sol/L_sol for the isolated triplets; 7 (8) M_sol/L_sol for the most compact pairs (triplets). We found also that systems in the denser environment have greater rms velocity and mass-to-luminosity ratio.

10.1111/j.1365-2966.2008.14150.x

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Citations (31)

On the determination of the orientation of a galaxy cluster.

Kinematika i Fizika Nebesnykh Tel (1999)

I. B. Vavilova

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THE DISTRIBUTION OF BARYON MATTER IN THE NEARBY X-RAY GALAXY CLUSTERS

DOAJ (DOAJ: Directory of Open Access Journals) (2012)

Iu. Babyk I. B. Vavilova

10.18524/1810-4215.2012.25.83328

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Morphological type and color indices of galaxies SDSS DR9 at 0.02 < r < 0.06

Kinematika i fizika nebesnyh tel (Online) (2018)

D. V. Dobrycheva I. B. Vavilova О. V. Мelnyk A. Elyiv

Ìîðôîëîãè÷åñêèé òèï è ïîêàçàòåëè öâåòà ãàëàêòèê SDSS DR9 íà 0.02 < z £ 0.06 Èññëåäóåòñÿ êîððåëÿöèÿ ïîêàçàòåëÿ öâåòà öåíòðàëüíûõ ãàëàêòèê ( M r < -20.7) è èõ ñëàáûõ ãàëàêòèê-ñîñåäåé (M r ³ -20.7) èç âûáîðêè 60 561 ãàëàêòèê SDSS DR9, îãðàíè÷åííîé ïî êðàñíîìó ñìåùåíèþ è àáñî ëþòíîé çâåçäíîé âåëè÷èíå çíà÷åíèÿìè 0.02 < z £ 0.06 è -24 m < < M r < -19.4 m .Äëÿ îïðåäåëåíèÿ ìîðôîëîãè÷åñêîãî òèïà ãàëàêòèê ïðèìå íÿë ñÿ ìåòîä ìàøèííîãî îáó÷åíèÿ «ñëó÷àéíûé ëåñ».Ñòàòè ñòè -÷åñêè ñóùåñòâåííàÿ êîððåëÿöèÿ îáíàðóaeåíà òîëüêî äëÿ ïàð «öåíòðàëüíàÿ -áëèaeàéøàÿ ñîñåäêà», ó êîòîðûõ ðàññòîÿíèå ìåaeäó êîìïîíåí òàìè ìåíüøå 100 êïê, à êàaeäûé èç êîìïîíåíòîâ ÿâëÿåòñÿ ãàëàê òèêîé ðàííåãî òèïà.Ïîëó÷åííûå ðåçóëüòàòû ñâèäåòåëüñòâóþò

10.15407/kfnt2018.06.022

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Statistical study of isolated and non-isolated AGNs in the Local Universe

Proceedings of the International Astronomical Union (2012)

N. G. Pulatova I. B. Vavilova Peter Berczik

Abstract We present the main results of statistical study of general properties of isolated AGN hosts and AGN hosts in pairs at z <0.05 as concerns with the environmental influence on the nuclear galaxy activity. With this aim we compiled the sample of 61 isolated AGNs selected from 2MIG Catalog and Catalog Veron+2010, and the sample of 109 AGNs in pairs selected from NED database. We found a significant excess content of Sy 2 type galaxies in comparison with Sy 1 type galaxies in both samples (44% and 11% among isolated AGNs, 48% and 6% among AGNs in pairs, respectively). Isolated AGN hosts of all spectral types are located, in average, at the more far distances and have a more complicated structure than AGNs in pairs as well as they are mostly of late morphological types. Our statistical analysis shows that the observed nuclear activity of isolated 2MIG AGNs during last 3 billions years and more, first of all, is connected with the internal galaxy parameters (relative mass/size, dark/visible matter content, multi-wavelength properties of gas-dust medium in accretion disks, tor's structure, central black hole mass etc.).

10.1017/s1743921312020091

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Citations (2)