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

被引：4

作者：

Strantzalis, A. ^{[1
]}

Hatzidimitriou, D. ^{[1
,2
]}

Zezas, A. ^{[3
,4
,5
,6
]}

Antoniou, V. ^{[6
,7
]}

Lianou, S. ^{[2
]}

Tsilia, S. ^{[1
]}

机构：

[1] Natl & Kapodistrian Univ Athens, Dept Phys, GR-15784 Zografos, Greece

[2] Natl Observ Athens, IAASARS, Penteli 15236, Greece

[3] Univ Crete, Phys Dept, Iraklion 71003, Crete, Greece

[4] Univ Crete, Inst Theoret & Computat Phys, Iraklion 71003, Crete, Greece

[5] Fdn Res & Technol Hellas, Iraklion 71110, Crete, Greece

[6] Texas Tech Univ, Dept Phys, Box 41051,Sci Bldg, Lubbock, TX 79409 USA

[7] Harvard Smithsosian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 489卷 / 04期

基金：

欧洲研究理事会; 欧盟地平线“2020”;

关键词：

techniques: photometric; galaxies: evolution; Magellanic Clouds; galaxies: photometry; galaxies: star formation; SPACE-TELESCOPE/ADVANCED CAMERA; SEQUENCE TURNOFF PHOTOMETRY; FORMATION HISTORY; VMC SURVEY; STELLAR; II; CATALOG; GALAXY;

D O I：

10.1093/mnras/stz2540

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：5087 / 5097

页数：11

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