Discovery of an edge-on galaxy with X-shaped bi-cone – SDSS J171359.00+333625.5

Journal Article · Wed Oct 16 00:00:00 EDT 2019 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/stz2892· OSTI ID:1677517

Bao, Min ^[1]; Chen, Yan-mei ^[2]; Yuan, Qi-rong ^[1]; Shi, Yong ^[2]; Bizyaev, Dmitry ^[3]; Yu, Xiao-ling ^[2]; Gu, Qiu-sheng ^[2]; Yu, Ying ^[2]

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1. Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210023, China
2. Department of Astronomy, Nanjing University, Nanjing 210093, China, Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, China, Collaborative Innovation Center of Modern Astronomy and Space Exploration, Nanjing 210093, China
3. Apache Point Observatory and New Mexico State University, P.O. Box 59, Sunspot, NM 88349-0059, USA, Sternberg Astronomical Institute, Moscow State University, Moscow, 119992, Russia

ABSTRACT

Using the integral field unit (IFU) data from Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, we study the kinematics of gas and stellar components in an edge-on Seyfert 2 galaxy, SDSS J171359.00+333625.5, with X-shaped bi-conical outflows. The gas and stars therein are found to be counter-rotating, indicating that the collision between the inner and external gas might be an effective way to dissipate the angular momentum, which leads to remarkable gas accretion into the galaxy centre. Large [O iii]λ5007 equivalent width and AGN-like line ratio in the large bi-conical region suggest that the gas is ionized by the central AGN. The gas velocity in the bi-cone region shows that ionized gas is receding relative to the galaxy centre, which could be the joint effect of inflows, outflows, and disc rotation. We are probably witnessing the case where a great amount of gas in the disc is being efficiently accreted into the central black hole, and the AGN-driven galactic winds are blown out along the bi-cone. The kinematics of oxygen, including rotation velocity and velocity dispersion, is different from other elements, like hydrogen, nitrogen, and sulphur. The rotation velocity estimated from oxygen is slower than from other elements. The velocity dispersion of other elements follows galactic gravitational potential, while the velocity dispersion of oxygen stays roughly constant along the galactic major-axis. The further advanced observations, e.g. of cold gas or with an IFU of higher spatial resolution, are required to better understand this object.

• Sponsoring Organization: USDOE
• OSTI ID: 1677517
• Journal Information: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 3 Vol. 490; ISSN 0035-8711
• Publisher: Oxford University Press
• Country of Publication: United Kingdom
• Language: English