Evidence for discrete star formation events in the Small Magellanic Cloud based on 6.5m Magellan Telescope observations

2018 ◽  
Vol 14 (S344) ◽  
pp. 143-146
Author(s):  
A. Strantzalis ◽  
D. Hatzidimitriou ◽  
A. Zezas ◽  
V. Antoniou
Keyword(s):  
Star Formation ◽  
Spatial Resolution ◽  
Milky Way ◽  
Magellanic Cloud ◽  
Star Formation History ◽  
Main Body ◽  
Small Magellanic Cloud ◽  
Environmental Processes ◽  
Luminosity Functions ◽  
Formation History

AbstractThe Small Magellanic Cloud (SMC) presents us with a unique opportunity to study in detail the effect of environmental processes (interaction with the LMC and the Milky Way) on its star formation history. With the 6.5m Magellan Telescope at the Las Campanas Observatory in Chile we have acquired deep B and I images in four 0.44 degree fields covering a large part of the main body of the SMC, yielding accurate photometry for 1,068,893 stars down to ~24th magnitude, with a spatial resolution of 0.201 arcsec/pixel. Colour-magnitude diagrams and luminosity functions (corrected for completeness) have been constructed, yielding significant new results that indicate at least two discrete star formation events around 2.7 and 4-5 Gyr ago.

scholarly journals Discrete star formation events in the central bar of the Small Magellanic Cloud

2019 ◽  
Vol 489 (4) ◽  
pp. 5087-5097 ◽  
Author(s):  
A Strantzalis ◽  
D Hatzidimitriou ◽  
A Zezas ◽  
V Antoniou ◽  
S Lianou ◽  
...  
Keyword(s):  
Star Formation ◽  
Spatial Resolution ◽  
Magellanic Cloud ◽  
Main Body ◽  
Small Magellanic Cloud ◽  
Photometric Analysis ◽  
Luminosity Functions ◽  
Look Back

ABSTRACT We present the results of the photometric analysis of a large part of the main body of the Small Magellanic Cloud. Using the 6.5m Magellan Telescope at the Las Campanas Observatory in Chile, we have acquired deep B and I images in four fields (0.44 deg each in diameter), yielding accurate photometry for 1068 893 stars down to 24th magnitude, with a spatial resolution of 0.20 arcsec per pixel. Colour–magnitude diagrams and (completeness-corrected) luminosity functions have been constructed, yielding significant new results that indicate at least two discrete star formation events over a period from 2.7 to 4 Gyr ago. Also, we have derived star formation rates as a function of look-back time and have found enhancements of SF between 4 and 6 Gyr and at younger ages.

scholarly journals The VMC survey – XXXI: The spatially resolved star formation history of the main body of the Small Magellanic Cloud

2018 ◽  
Vol 478 (4) ◽  
pp. 5017-5036 ◽  
Author(s):  
Stefano Rubele ◽  
Giada Pastorelli ◽  
Léo Girardi ◽  
Maria-Rosa L Cioni ◽  
Simone Zaggia ◽  
...  
Keyword(s):  
Star Formation ◽  
Magellanic Cloud ◽  
Star Formation History ◽  
Main Body ◽  
Small Magellanic Cloud ◽  
Spatially Resolved ◽  
Formation History ◽  
History Of

Calibrating TP-AGB stellar models and chemical yields through resolved stellar populations in the Small Magellanic Cloud

2018 ◽  
Vol 14 (S343) ◽  
pp. 269-272
Author(s):  
Giada Pastorelli ◽  
Paola Marigo ◽  
Léo Girardi ◽  
Keyword(s):  
Mass Loss ◽  
Magellanic Cloud ◽  
Star Formation History ◽  
Agb Stars ◽  
Population Synthesis ◽  
Small Magellanic Cloud ◽  
Luminosity Functions ◽  
Formation History ◽  
Best Fitting ◽  
The Impact

AbstractMost of the physical processes driving the TP-AGB evolution are not yet fully understood and they need to be modelled with parameterised descriptions. We present the results of the on-going calibration of the TP-AGB phase based on a complete sample of AGB stars in the Small Magellanic Cloud (SAGE-SMC survey). We computed large grids of TP-AGB models with several combinations of third dredge-up and mass-loss prescriptions with the COLIBRI code. The SMC AGB population is modelled with the population synthesis code TRILEGAL according to the space-resolved star formation history derived with the deep photometry from the VISTA survey of the Magellanic Clouds. We put quantitative constraints on the efficiencies of the third dredge-up and mass loss by requiring the models to reproduce the star counts and the luminosity functions of the observed Oxygen-, Carbon-rich and extreme-AGB stars and we investigate the impact of the best-fitting prescriptions on the chemical yields.

scholarly journals A near-infrared VISTA of the Small Magellanic Cloud

2018 ◽  
Vol 14 (S344) ◽  
pp. 53-56
Author(s):  
Maria-Rosa L. Cioni ◽  
Florian Niederhofer ◽  
Stefano Rubele ◽  
Ning-Chen Sun
Keyword(s):  
Near Infrared ◽  
Stellar Populations ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Level Of Detail ◽  
Star Formation History ◽  
Main Body ◽  
Small Magellanic Cloud ◽  
Formation History ◽  
The Galaxy

AbstractVISTA observed the Small Magellanic Cloud (SMC), as part of the VISTA survey of the Magellanic Clouds system (VMC), for six years (2010–2016). The acquired multi-epoch YJKs images have allowed us to probe the stellar populations to an exceptional level of detail across an unprecedented wide area in the near-infrared. This contribution highlights the most recent VMC results obtained on the SMC focusing, in particular, on the clustering of young stellar populations, on the proper motion of stars in the main body of the galaxy and on the spatial distribution of the star formation history.

scholarly journals STAR FORMATION HISTORY IN TWO FIELDS OF THE SMALL MAGELLANIC CLOUD BAR

2012 ◽  
Vol 754 (2) ◽  
pp. 130 ◽  
Author(s):  
M. Cignoni ◽  
A. A. Cole ◽  
M. Tosi ◽  
J. S. Gallagher ◽  
E. Sabbi ◽  
...  
Keyword(s):  
Star Formation ◽  
Magellanic Cloud ◽  
Star Formation History ◽  
Small Magellanic Cloud ◽  
Formation History

scholarly journals MEAN AGE GRADIENT AND ASYMMETRY IN THE STAR FORMATION HISTORY OF THE SMALL MAGELLANIC CLOUD

2013 ◽  
Vol 775 (2) ◽  
pp. 83 ◽  
Author(s):  
M. Cignoni ◽  
A. A. Cole ◽  
M. Tosi ◽  
J. S. Gallagher ◽  
E. Sabbi ◽  
...  
Keyword(s):  
Star Formation ◽  
Magellanic Cloud ◽  
Star Formation History ◽  
Small Magellanic Cloud ◽  
Formation History ◽  
History Of

Intermediate-age and Old Populations in the Small Magellanic Cloud

1999 ◽  
Vol 190 ◽  
pp. 299-305 ◽  
Author(s):  
D. Hatzidimitriou
Keyword(s):  
Star Formation ◽  
Magellanic Cloud ◽  
Star Formation History ◽  
Small Magellanic Cloud ◽  
Formation History ◽  
History Of ◽  
The Subject

The star formation history and kinematics of intermediate-age and old populations in the Small Magellanic Cloud are the subject of this brief review. New results confirm the occurrence of a period of enhanced SF about 8–10 Gyr ago in the SMC. Younger populations are confirmed to be more centrally concentrated than older ones. The SMC, at least in the areas studied (which do not include the Bar) seems to have had a different history of star formation from the LMC. Although the kinematics of the SMC have been extensively studied, it is still unclear if there are distinct Bar, disk and halo components, or if all populations share the same kinematics.

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