CEPHEID VARIABLE STARS IN THE PEGASUS DWARF IRREGULAR GALAXY: CONSTRAINTS ON THE STAR FORMATION HISTORY

2009 ◽  
Vol 137 (3) ◽  
pp. 3619-3631 ◽  
Author(s):  
I. Meschin ◽  
C. Gallart ◽  
A. Aparicio ◽  
S. Cassisi ◽  
A. Rosenberg
Keyword(s):  
Star Formation ◽  
Variable Stars ◽  
Star Formation History ◽  
Irregular Galaxy ◽  
Formation History

scholarly journals Addendum: The Dwarf Irregular Galaxy Sextans A. II. Recent Star Formation History [Astron. J. [BF]114[/BF], 2527 (1997)]

1998 ◽  
Vol 115 (1) ◽  
pp. 152-153 ◽  
Author(s):  
Robbie C. Dohm-Palmer ◽  
Evan D. Skillman ◽  
A. Saha ◽  
E. Tolstoy ◽  
Mario Mateo ◽  
...  
Keyword(s):  
Star Formation ◽  
Star Formation History ◽  
Irregular Galaxy ◽  
Formation History

The Local Group Dwarf Irregular Galaxy NGC 6822.III. The Recent Star Formation History

1996 ◽  
Vol 112 ◽  
pp. 2596 ◽  
Author(s):  
C. Gallart ◽  
A. Aparicio ◽  
G. Bertelli ◽  
C. Chiosi
Keyword(s):  
Star Formation ◽  
Local Group ◽  
Star Formation History ◽  
Irregular Galaxy ◽  
Formation History ◽  
Ngc 6822

scholarly journals Star clusters and young populations in the dwarf irregular galaxy Leo A

2018 ◽  
Vol 14 (S344) ◽  
pp. 139-142
Author(s):  
Rima Stonkutė ◽  
Marius Čeponis ◽  
Alina Leščinskaitė ◽  
Vladas Vansevičius
Keyword(s):  
Star Formation ◽  
Star Clusters ◽  
Star Formation History ◽  
Molecular Gas ◽  
Irregular Galaxy ◽  
Formation History ◽  
Low Metallicity ◽  
Low Mass ◽  
Density Map ◽  
Formation Efficiency

AbstractWe have studied young stellar populations and star clusters in the dwarf irregular galaxy Leo A using multicolor (B, V, R, I, Hα) photometry data obtained with the Subaru Suprime-Cam and two-color photometry results measured on archival HST/ACS F475W & F814W frames. The analysis of the main sequence (MS) and blue supergiant (BSG – “blue loop”) stars enabled us to study the star formation history in the Leo A galaxy during the last ~200 Myr. Also, we have discovered 5 low-mass (≲ 400 M⊙) star clusters within the ACS field. This finding, taking into account a low metallicity environment and a yet-undetected molecular gas in Leo A, constrains star formation efficiency estimates and scenarios. Inside the well known “hole” in the H i column density map (Hunter et al. 2012) we found a shock front (prominent in Hα), implying an unseen progenitor and reminding the “hole” problems widely discussed by Warren et al. (2011).

scholarly journals SMC in space and time: a project to study the evolution of the prototype interacting late-type dwarf galaxy

2008 ◽  
Vol 4 (S255) ◽  
pp. 381-386 ◽  
Author(s):  
M. Tosi ◽  
J. Gallagher ◽  
E. Sabbi ◽  
K. Glatt ◽  
E. K. Grebel ◽  
...  
Keyword(s):  
Star Formation ◽  
Dwarf Galaxy ◽  
Variable Stars ◽  
Star Formation History ◽  
Space And Time ◽  
Deep Well ◽  
Formation History ◽  
Central Regions ◽  
Stellar Halo ◽  
Hubble Time

AbstractWe introduce the SMC in space and time, a large coordinated space and ground-based program to study star formation processes and history, as well as variable stars, structure, kinematics and chemical evolution of the whole SMC. Here, we present the Colour-Magnitude Diagrams (CMDs) resulting from HST/ACS photometry, aimed at deriving the star formation history (SFH) in six fields of the SMC. The fields are located in the central regions, in the stellar halo, and in the wing toward the LMC. The CMDs are very deep, well beyond the oldest Main Sequence Turn-Off, and will allow us to derive the SFH over the entire Hubble time.

Ultraviolet Imaging of the Irregular Galaxy NGC 4449 with the Ultraviolet Imaging Telescope: Photometry and Recent Star Formation History

1998 ◽  
Vol 507 (1) ◽  
pp. 179-198 ◽  
Author(s):  
Robert S. Hill ◽  
Michael N. Fanelli ◽  
Denise A. Smith ◽  
Ralph C. Bohlin ◽  
Susan G. Neff ◽  
...  
Keyword(s):  
Star Formation ◽  
Star Formation History ◽  
Irregular Galaxy ◽  
Formation History ◽  
Imaging Telescope
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