Deep optical imaging of a compact group of galaxies, Seyfert's Sextet

Shingo Nishiura, Takashi Murayama, Masashi Shimada, Yasunori Sato, Tohru Nagao, Kohji Molikawa, Yoshiaki Taniguchi, D. B. Sanders

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

To investigate the dynamical status of Seyfert's Sextet (SS), we have obtained a deep optical (VR + I) image of this group. Our image shows that a faint envelope, down to a surface brightness μoptical(AB) ≃ 27 mag arcsec-2, surrounds the member galaxies. This envelope is irregular in shape. It is likely that this shape is attributed either to recent-past or to ongoing galaxy interactions in SS. If the member galaxies have experienced a number of mutual interactions over a long timescale, the shape of the envelope should be rounder. Therefore, the irregularly shaped morphology suggests that SS is in an early phase of dynamical interaction among the member galaxies. It is interesting to note that the soft X-ray image obtained with ROSA T (Pildis, Bregman, & Evrard) is significantly similar in morphology. We discuss the possible future evolution of SS briefly.

Original languageEnglish
Pages (from-to)2355-2362
Number of pages8
JournalAstronomical Journal
Volume120
Issue number5
DOIs
Publication statusPublished - 2000 Nov

Keywords

  • Dark matter
  • Galaxies: individual (Seyfert's Sextet = HCG 79)
  • X-rays

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Deep optical imaging of a compact group of galaxies, Seyfert's Sextet'. Together they form a unique fingerprint.

  • Cite this

    Nishiura, S., Murayama, T., Shimada, M., Sato, Y., Nagao, T., Molikawa, K., Taniguchi, Y., & Sanders, D. B. (2000). Deep optical imaging of a compact group of galaxies, Seyfert's Sextet. Astronomical Journal, 120(5), 2355-2362. https://doi.org/10.1086/316799