Journal article
Buckling Bars in Nearly Face-on Galaxies Observed with MaNGA
The Astrophysical journal, Vol.909(2), p.125
03/01/2021
DOI: 10.3847/1538-4357/abdab5
Abstract
Over half of disk galaxies are barred, yet the mechanisms for bar formation and the lifetime of bar buckling remain poorly understood. In simulations, a thin bar undergoes a rapid (<1 Gyr) event called "buckling," during which the inner part of the bar is asymmetrically bent out of the galaxy plane and eventually thickens, developing a peanut/X-shaped profile when viewed side-on. Through analyzing stellar kinematics of N-body model snapshots of a galaxy before, during, and after the buckling phase, we confirm a distinct quadrupolar pattern of out-of-plane stellar velocities in nearly face-on galaxies. This kinematic signature of buckling allows us to identify five candidates of currently buckling bars among 434 barred galaxies in the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) Survey, an integral field unit spectroscopic survey that measures the composition and kinematic structure of nearby galaxies. The frequency of buckling events detected is consistent with the 0.5-1 Gyr timescale predicted by simulations. The five candidates we present more than double the total number of candidate buckling bars and are the only ones found using the kinematic signature.
Details
- Title: Subtitle
- Buckling Bars in Nearly Face-on Galaxies Observed with MaNGA
- Creators
- Katherine M. Xiang - Johns Hopkins UniversityDavid M. Nataf - Johns Hopkins UniversityE. Athanassoula - Laboratoire d’Astrophysique de MarseilleNadia L. Zakamska - Johns Hopkins UniversityKate Rowlands - Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USAKaren Masters - Haverford Coll, Dept Phys & Astron, 370 Lancaster Ave, Haverford, PA 19041 USAAmelia Fraser-McKelvie - University of NottinghamNiv Drory - Univ Texas Austin, McDonald Observ, 1 Univ Stn, Austin, TX 78712 USAKatarina Kraljic - Aix-Marseille Université
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.909(2), p.125
- Publisher
- IOP Publishing Ltd
- DOI
- 10.3847/1538-4357/abdab5
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Number of pages
- 17
- Grant note
- University of Notre Dame New York University Universidad Nacional Autonoma de Mexico Maryland Space Grant Consortium University of Utah Harvard-Smithsonian Center for Astrophysics; Smithsonian Institution Lawrence Berkeley National Laboratory; United States Department of Energy (DOE) Observatario Nacional/MCTI CNES; Centre National D'etudes Spatiales Ohio State University
- Language
- English
- Date published
- 03/01/2021
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984701735302771
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