Spatially resolved LMC star formation history: I. Outside in evolution of the outer LMC disk

Abstract

We study the evolution of three fields in the outer LMC disk Rgc=3.5-6.2 Kpc. Their star formation history indicates a stellar populations gradient such that younger stellar populations are more centrally concentrated. We identify two main star forming epochs, separated by a period of lower activity between ~7 and ~4 Gyr ago. Their relative importance varies from a similar amount of stars formed in the two epochs in the innermost field, to only 40% of the stars formed in the more recent epoch in the outermost field. The young star forming epoch continues to the present time in the innermost field, but lasted only till ~0.8 and 1.3 Gyr ago at Rgc=5.5 degrees and 7.1 degrees, respectively. This gradient is correlated with the measured HI column density and implies an outside-in quenching of the star formation, possibly related to a variation of the size of the HI disk. This could either result from gas depletion due to star formation or ram-pressure stripping, or from to the compression of the gas disk as ram-pressure from the Milky Way halo acted on the LMC interstellar medium. The latter two situations may have occurred when the LMC first approached the Milky Way.

15 pages, 13 figures, 4 tables. MNRAS, in press

References in corpus (13)

• An eclipsing binary distance to the Large Magellanic Cloud accurate to 2 per cent
• Are the Magellanic Clouds on their First Passage about the Milky Way?
• Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
• Stellar Multiplicity and the IMF: Most Stars Are Single
• The Origin of the Magellanic Stream and Its Leading Arm
• Radial mixing and the transition between the thick and thin Galactic discs
• Exploring Halo Substructure with Giant Stars XI: The Tidal Tails of the Carina Dwarf Spheroidal and the Discovery of Magellanic Cloud Stars in the Carina Foreground
• The Chemical Enrichment History of the Large Magellanic Cloud
• Dynamics of the Magellanic Clouds in a LCDM Universe
• Dynamical Influences of the Last Magellanic Interaction On the Magellanic Clouds
• Outside-in disk evolution in the LMC
• Implications of Recent Measurements of the Milky Way Rotation for the Orbit of the Large Magellanic Cloud
• A possible common halo of the Magellanic Clouds

Cited by in corpus (53)

• APOGEE Chemical Abundance Patterns of the Massive Milky Way Satellites
• The ACS LCID Project: On the origin of dwarf galaxy types: a manifestation of the halo assembly bias?
• SMASH - Survey of the MAgellanic Stellar History
• The Lazy Giants: APOGEE Abundances Reveal Low Star Formation Efficiencies in the Magellanic Clouds
• SMASHing the LMC: A Tidally-induced Warp in the Outer LMC and a Large-scale Reddening Map
• The Magellanic Stream System: I. Ram-pressure tails and the relics of the collision between the Magellanic Clouds
• Low Surface Brightness Imaging of the Magellanic System: Imprints of Tidal Interactions between the Clouds in the Stellar Periphery
• The effect of the LMC on the Milky Way system
• The synchronised dance of the Magellanic Clouds' star formation history
• The star formation history of the Magellanic Clouds derived from long-period variable star counts
• The VMC survey -- XLIII. The spatially resolved star formation history across the Large Magellanic Cloud
• The LMC geometry and outer stellar populations from early DES data
• The supernova remnant population of the Small Magellanic Cloud
• Discovery of an Ultra-Faint Stellar System near the Magellanic Clouds with the DECam Local Volume Exploration (DELVE) Survey
• Unmixing the Galactic Halo with RR Lyrae tagging
• SMASHing THE LMC: Mapping a Ring-like Stellar Overdensity in the LMC Disk
• The bursty star formation history of the Fornax dwarf spheroidal galaxy revealed with the HST
• Exploring the Very Extended Low Surface Brightness Stellar Populations of the Large Magellanic Cloud with SMASH
• Chronology of our Galaxy from Gaia Colour-Magnitude Diagram-fitting (ChronoGal). I. The formation and evolution of the thin disk from the Gaia Catalogue of Nearby Stars
• The Second Data Release of the Survey of the MAgellanic Stellar History (SMASH)
• The Large Magellanic Cloud stellar content with SMASH: I. Assessing the stability of the Magellanic spiral arms
• Recovering star formation histories: Integrated-light analyses vs stellar colour-magnitude diagrams
• Reddening map and recent star formation in the Magellanic Clouds based on OGLE IV Cepheids
• The ISLANDS project I: Andromeda XVI, An Extremely Low Mass Galaxy not Quenched by Reionization
• Chemical Abundances in the Leading Arm of the Magellanic Stream
• Star Formation Histories of the LEGUS dwarf galaxies. II. Spatially resolved star formation history of the Magellanic irregular NGC 4449
• Physical properties of star clusters in the outer LMC as observed by the Dark Energy Survey
• Astrophysical properties of star clusters in the Magellanic Clouds homogeneously estimated by $\text{ASteCA}$
• Star cluster formation history along the minor axis of the Large Magellanic Cloud
• Carbon stars as standard candles: II. The median J magnitude as a distance indicator
• The initial mass function and star formation law in the outer disc of NGC 2915
• Constraints on the star formation histories of galaxies in the Local Cosmological Volume
• Metallicities and ages for star clusters and their surrounding fields in the Large Magellanic Cloud
• The VMC survey - XVI. Spatial variation of the cluster-formation activity in the innermost regions of the Large Magellanic Cloud
• The origin of the LMC stellar bar: clues from the SFH of the bar and inner disk
• Young stars in the periphery of the Large Magellanic Cloud
• Relationships between the Stellar, Gaseous, and Star Formation Disks in LITTLE THINGS Dwarf Irregular Galaxies: Indirect Evidence for Substantial Fractions of Dark Molecular Gas
• Metallicity estimates of young clusters in the Magellanic Clouds from Stromgren photometry of supergiant stars
• Radial Star Formation Histories in 32 Nearby Galaxies
• The Star-Forming Histories of the Nucleus, Bulge, and Inner Disk of NGC 5102: Clues to the Evolution of a Nearby Lenticular Galaxy
• The RR Lyrae Delay-Time Distribution: A Novel Perspective on Models of Old Stellar Populations
• Discovery of a loose star cluster in the Large Magellanic Cloud
• The Initial Mass Function in the Extended Ultraviolet Disk of M83
• Outskirts of Nearby Disk Galaxies: Star Formation and Stellar Populations
• The Magellanic Puzzle: origin of the periphery
• Spatio-temporal map of star clusters in the Magellanic Clouds using Gaia: Synchronized peaks and radial shrinkage of cluster formation
• Astrophysical properties of newly discovered Magellanic Cloud star clusters
• A likely runaway star cluster in the outer disc of the Large Magellanic Cloud
• Chemo-Dynamical Tagging in the Outskirts: The Origins of Stellar Substructures in the Magellanic Clouds
• Sizing the star cluster population of the Large Magellanic Cloud
• "Observations" of simulated dwarf galaxies: Star-formation histories from color-magnitude diagrams
• Peeping into recent star formation history of the Magellanic Clouds
• SILCC -- IX. The multi-phase interstellar medium at low metallicity