Discovery of Ram-pressure Stripped Gas around an Elliptical Galaxy in Abell 2670

Yun Kyeong Sheen, Rory Smith, Yara Jaffé, Minjin Kim, Sukyoung K. Yi, Pierre Alain Duc, Julie Nantais, Graeme Candlish, Ricardo Demarco, Ezequiel Treister

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Studies of cluster galaxies are increasingly finding galaxies with spectacular one-sided tails of gas and young stars, suggestive of intense ram-pressure stripping. These so-called "jellyfish" galaxies typically have late-type morphology. In this paper, we present Multi Unit Spectroscopic Explorer (MUSE) observations of an elliptical galaxy in Abell 2670 with long tails of material visible in the optical spectra, as well as blobs with tadpole-like morphology. The spectra in the central part of the galaxy reveal a stellar component as well as ionized gas. The stellar component does not have significant rotation, while the ionized gas defines a clear star-forming gas disk. We argue, based on deep optical images of the galaxy, that the gas was most likely acquired during a past wet merger. It is possible that the star-forming blobs are also remnants of the merger. In addition, the direction and kinematics of the one-sided ionized tails, combined with the tadpole morphology of the star-forming blobs, strongly suggests that the system is undergoing ram pressure from the intracluster medium. In summary, this paper presents the discovery of a post-merger elliptical galaxy undergoing ram-pressure stripping.

Original languageEnglish
Article numberL7
JournalAstrophysical Journal Letters
Volume840
Issue number1
DOIs
Publication statusPublished - 2017 May 1

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ram
elliptical galaxies
gas pressure
galaxies
merger
stars
gas
ionized gases
stripping
gases
jellyfish
optical spectrum
kinematics

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Sheen, Yun Kyeong ; Smith, Rory ; Jaffé, Yara ; Kim, Minjin ; Yi, Sukyoung K. ; Duc, Pierre Alain ; Nantais, Julie ; Candlish, Graeme ; Demarco, Ricardo ; Treister, Ezequiel. / Discovery of Ram-pressure Stripped Gas around an Elliptical Galaxy in Abell 2670. In: Astrophysical Journal Letters. 2017 ; Vol. 840, No. 1.
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Sheen, YK, Smith, R, Jaffé, Y, Kim, M, Yi, SK, Duc, PA, Nantais, J, Candlish, G, Demarco, R & Treister, E 2017, 'Discovery of Ram-pressure Stripped Gas around an Elliptical Galaxy in Abell 2670', Astrophysical Journal Letters, vol. 840, no. 1, L7. https://doi.org/10.3847/2041-8213/aa6d79

Discovery of Ram-pressure Stripped Gas around an Elliptical Galaxy in Abell 2670. / Sheen, Yun Kyeong; Smith, Rory; Jaffé, Yara; Kim, Minjin; Yi, Sukyoung K.; Duc, Pierre Alain; Nantais, Julie; Candlish, Graeme; Demarco, Ricardo; Treister, Ezequiel.

In: Astrophysical Journal Letters, Vol. 840, No. 1, L7, 01.05.2017.

Research output: Contribution to journalArticle

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AU - Duc, Pierre Alain

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AU - Treister, Ezequiel

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