• DOI:10.1134/s1063773720050072
• Corpus ID: 221397128

Extended Gaseous Disk in the S0 Galaxy NGC 4143

@article{Silchenko2020ExtendedGD,
  title={Extended Gaseous Disk in the S0 Galaxy NGC 4143},
  author={O. K. Sil'chenko and Alexei V. Moiseev and D. V. Oparin},
  journal={arXiv: Astrophysics of Galaxies},
  year={2020}
}

• O. Sil'chenko, A. Moiseev, D. Oparin
• Published 31 August 2020
• Physics
• arXiv: Astrophysics of Galaxies

We present our results of the spectroscopic study of the lenticular galaxy NGC 4143 - an outskirt member of the Ursa Major cluster. Using the observations at the 6-m SAO RAS telescope with the SCORPIO-2 spectrograph and also the archive data of panoramic spectroscopy with the SAURON IFU at the WHT, we have detected an extended inclined gaseous disk which is traced up to a distance of about 3.5 kpc from the center, with a spin approximately opposite to the spin of the stellar disk. The galaxy images in the H-alpha and [NII]6583 emission lines obtained at the 2.5-m CMO SAI MSU telescope with the MaNGaL instrument have shown that the emission lines are excited by a shock wave. A spiral structure that is absent in the stellar disk of the galaxy is clearly seen in the brightness distribution of ionized-gas lines (H-alpha and [NII] from the MaNGaL data and [OIII] from the SAURON data). A complex analysis of both the Lick index distribution along the radius and of the integrated colors, including the ultraviolet measurements with the GALEX space telescope and the near-infrared measurements with the WISE space telescope, has shown that there has been no star formation in the galaxy, perhaps, for the last 10 Gyr. Thus, the recent external-gas accretion detected in NGC 4143 from its kinematics, was not accompanied by star formation, probably, due to an inclined direction of the gas inflow onto the disk.