Uncovering dwarf elliptical evolution through spatially resolved spectroscopy. Issue Volume 14:Issue S344(2019) (August 2018)

• Record Type: Journal Article
• Authors: Penny, Samantha J.
• Editors: McQuinn, Kristen B. W.; Stierwalt, Sabrina
• Is Part Of: Proceedings of the International Astronomical Union. Volume 14:Issue S344(2019)
• Page Start: 345
• Page End: 348
• Publication Date: 2018-08
• Subjects: galaxies: dwarf, -- galaxies: evolution, -- galaxies: active, -- galaxies: kinematics and dynamics; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921318006725
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Using spatially resolved spectroscopy from the SDSS-IV Mapping Nearby Galaxies at APO (MaNGA) survey, we identify 69 dwarf elliptical (dE) galaxies in the nearby Universe fainter than M r = −19 (M B = −18), selected independently of morphology and environment. The majority exhibit coherent rotation in their stellar kinematics, consistent with an origin as morphologically transformed disk galaxies. Six galaxies in this dE sample appear to host Active Galactic Nuclei (AGN) that are likely preventing current star formation through maintenance mode feedback. The ionised gas component of these dEs is typically kinematically offset from the stellar component, suggesting the gas is either recently accreted or outflowing. We therefore demonstrate the potential of IFU spectroscopy for understanding the physical properties of dwarf galaxies in detail.