Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011hsa6.conf..285o&link_type=abstract
Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present the study of the star formation activity in Haro 2, a Lyα emitter, blue compact galaxy in the Local Universe. Given the similarities of Haro 2 with more distant galaxies, we aim to understand the Lyα emission in a local prototype in order to better interpret this emission in star-forming galaxies at high redshifts. Starbursting activity inside the galaxy releases huge amounts of mechanical energy. As a consequence the surrounding gas is accelerated and heated, producing intense soft X-ray radiation. Moreover, the outflow of the neutral gas might allow the escape of Lyα photons emitted by recombination. We believe that the turbulent motion of the gas generates an additional component of diffuse collisional Lyα emission, which we find to coincide spatially with the soft X-ray emission, and not with the Balmer lines produced by recombination. A correct understanding of these processes is essential to properly calibrate the star formation rate in high-redshift galaxies as a function of the Lyα intensity.
Mas-Hesse Jose Miguel
Oti-Floranes Hector
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