Stellar density distribution along the minor axis of the Large Magellanic Cloud
arXiv:1710.04053 · doi:10.1093/mnras/stx2686
Abstract
We studied the spatial distribution of young and old stellar populations along the western half part of the minor axis of the Large Magellanic Cloud (LMC) using Washington MT1 photometry of selected fields, which span a deprojected distance range from the LMC bar centre out to ~ 31.6 kpc. We found that both stellar populations share a mean LMC limiting radius of 8.9+-0.4 kpc; old populations are three times more dense that young populations at that LMC limit. When comparing this result with recent values for the LMC extension due to north, the old populations resulted significantly more elongated than the young ones. Bearing in mind previous claims that the elongation of the outermost LMC regions may be due to the tidal effects of the Milky Way (MW), our findings suggest that such a tidal interaction should not have taken place recently. The existence of young populations in the outermost western regions also supports previous results about ram pressure stripping effects of the LMC gaseous disc due to the motion of the LMC in the MW halo.
arXiv comment7 pages, 4 figures. Accepted for publication in MNRAS
References in corpus (21)
- PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
- Are the Magellanic Clouds on their First Passage about the Milky Way?
- Third-Epoch Magellanic Cloud Proper Motions I: HST/WFC3 data and Orbit Implications
- A general catalogue of extended objects in the Magellanic System
- New Optical Reddening Maps of the Large and Small Magellanic Clouds
- Magellanic Cloud Structure from Near-IR Surveys II: Star Count Maps and the Intrinsic Elongation of the LMC
- GASS: The Parkes Galactic All-Sky Survey. Update: improved correction for instrumental effects and new data release
- Ram Pressure Stripping of the Large Magellanic Cloud's Disk as a Probe of the Milky Way's Circumgalactic Medium
- The age-metallicity relationship of the Large Magellanic Cloud field star population from wide-field Washington photometry
- Low Surface Brightness Imaging of the Magellanic System: Imprints of Tidal Interactions between the Clouds in the Stellar Periphery
- A 10 kpc stellar substructure at the edge of the Large Magellanic Cloud: perturbed outer disk or evidence for tidal stripping?
- The LMC geometry and outer stellar populations from early DES data
- OGLE-ing the Magellanic System: Stellar populations in the Magellanic Bridge
- Constraints on the Magellanic Clouds' Interaction from the Distribution of OB Stars and the Kinematics of Giants
- Star cluster formation history along the minor axis of the Large Magellanic Cloud
- The star cluster frequency throughout the Large Magellanic Cloud
- Observational hints of a real age spread in the young LMC star cluster NGC 1971
- Young stars in the periphery of the Large Magellanic Cloud
- H I Kinematics of the Large Magellanic Cloud revisited : Evidence of possible infall and outflow
- The Properties of the Magellanic Bridge Based on OGLE IV RR Lyrae Variables
- The real population of star clusters in the bar of the Large Magellanic Cloud