TY - JOUR

T1 - 2-d spectroscopy of polar-ring galaxies candidates. Ii. the peculiar galaxies ngc 2748 and ugc 4385*

AU - Merkulova, O. A.

AU - Shalyapina, L. V.

AU - Yakovleva, V. A.

N1 - Funding Information: We are grateful to the Commission on the Subject of Large Telescopes for allocating observational time on the 6-m telescope. We also wish to thank A.V. Moiseev (SAO RAS) for help with the observations on the 6-m telescope and the FPI data reduction, for the provided data analysis codes, and E.V. Volkov for discussion and valuable remarks in preparing the text of the article. This work was supported by the Russian Foundation for Basic Research (project no. 05-02-17458). Publisher Copyright: © 2009, Pleiades journals. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2009/9

Y1 - 2009/9

N2 - This article is devoted to the analysis of new observational data obtained on the 6-m telescope using multimode instrument SCORPIO for two peculiar galaxies NGC 2748 and UGC 4385. Using scanning Fabry-Perot interferometer (FPI) large-scale velocity fields of ionized gas in lines Hα and [N II] λ6584 A˚ for NGC 2748 and in line Hα for UGC 4385 and the maps of brightness distribution in continuum and in corresponding lines for both galaxies were constructed. Observational data obtained in the long-slit mode of spectroscopy gave information about the kinematics of stellar component. The analysis of the received materials for NGC 2748 have shown that this object is a disky galaxy with stellar shell which rotates around the major axis of main body. The origin of such shell is most likely connected with the capture and disruption of dwarf companion. The structure of ionized gas velocity field of UGC 4385 appeared to be very complex. The most regular part of the field which concerns the supposed ring is best represented by the model of circular rotation with expansion. In addition long-slit observations showed that the optical spectra of two bright in the infrared region condensations resemble the spectra of galaxies’ nuclei. A supposition was made that UGC 4385 is two galaxies in the stage of head-on collision.

AB - This article is devoted to the analysis of new observational data obtained on the 6-m telescope using multimode instrument SCORPIO for two peculiar galaxies NGC 2748 and UGC 4385. Using scanning Fabry-Perot interferometer (FPI) large-scale velocity fields of ionized gas in lines Hα and [N II] λ6584 A˚ for NGC 2748 and in line Hα for UGC 4385 and the maps of brightness distribution in continuum and in corresponding lines for both galaxies were constructed. Observational data obtained in the long-slit mode of spectroscopy gave information about the kinematics of stellar component. The analysis of the received materials for NGC 2748 have shown that this object is a disky galaxy with stellar shell which rotates around the major axis of main body. The origin of such shell is most likely connected with the capture and disruption of dwarf companion. The structure of ionized gas velocity field of UGC 4385 appeared to be very complex. The most regular part of the field which concerns the supposed ring is best represented by the model of circular rotation with expansion. In addition long-slit observations showed that the optical spectra of two bright in the infrared region condensations resemble the spectra of galaxies’ nuclei. A supposition was made that UGC 4385 is two galaxies in the stage of head-on collision.

KW - Galaxies

KW - Groups of galaxies

KW - Interacting galaxies—kinematics

KW - Structure

UR - http://www.scopus.com/inward/record.url?scp=81055137031&partnerID=8YFLogxK

U2 - 10.1134/S1063773709090023

DO - 10.1134/S1063773709090023

M3 - Article

AN - SCOPUS:81055137031

VL - 35

SP - 587

EP - 598

JO - Astronomy Letters

JF - Astronomy Letters

SN - 1063-7737

IS - 9

ER -