Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'500'096
Articles rated: 2609

19 April 2024

» arxiv » 1409.4495

Article overview

The SAMI Galaxy Survey: The discovery of a luminous, low-metallicity H II complex in the dwarf galaxy GAMA J141103.98-003242.3
S. N. Richards ; A. L. Schaefer ; A. R. Lopez-Sanchez ; S. M. Croom ; J. J. Bryant ; S. M. Sweet ; I. S. Konstantopoulos ; J. T. Allen ; J. Bland-Hawthorn ; J. V. Bloom ; S. Brough ; L. M. R. Fogarty ; M. Goodwin ; A. W. Green ; I.-T. Ho ; L. J. Kewley ; B. S. Koribalski ; J. S. Lawrence ; M. S. Owers ; E. M. Sadler ; R. Sharp ;
Date:	16 Sep 2014
Abstract:	We present the discovery of a luminous unresolved H II complex on the edge of dwarf galaxy GAMA J141103.98-003242.3 using data from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. This dwarf galaxy is situated at a distance of ~100 Mpc and contains an unresolved region of H II emission that contributes ~70 per cent of the galaxy’s H_alpha luminosity, located at the top end of established H II region luminosity functions. For the H II complex, we measure a star-formation rate of 0.147pm0.041 M_solar yr^-1 and a metallicity of 12+log(O/H) = 8.01pm0.05 that is lower than the rest of the galaxy by ~0.2 dex. Data from the H I Parkes All-Sky Survey (HIPASS) indicate the likely presence of neutral hydrogen in the galaxy to potentially fuel ongoing and future star-forming events. We discuss various triggering mechanisms for the intense star-formation activity of this H II complex, where the kinematics of the ionised gas are well described by a rotating disc and do not show any features indicative of interactions. We show that SAMI is an ideal instrument to identify similar systems to GAMA J141103.98-003242.3, and the SAMI Galaxy Survey is likely to find many more of these systems to aid in the understanding of their formation and evolution.
Source:	arXiv, 1409.4495
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser claudebot

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap