Dwarf galaxies as hosts of stellar explosions: gas kinematics and abundances in 3D
| Autor: | Luca Izzo, Lise Christensen, H. Flores, S. D. Vergani, Cristina Carina Thöne |
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| Rok vydání: | 2019 |
| Předmět: |
Astrophysics::High Energy Astrophysical Phenomena
Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences 0103 physical sciences GRB 030329 Astrophysics::Solar and Stellar Astrophysics Spectral resolution 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Dwarf galaxy Gamma rays: bursts Physics Galaxies: dwarf 010308 nuclear & particles physics kinematics and dynamics [Galaxies] Galaxies: kinematics and dynamics Astronomy and Astrophysics Galaxy Redshift Blueshift Afterglow dwarf [Galaxies] starburst [Galaxies] bursts [Gamma rays] Space and Planetary Science Gamma-ray burst Galaxies: starburst |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | In: Dwarf galaxies: from the deep universe to the present; edited by:McQuinn, KBW; Stierwalt, S.; ISBN:978-1-108-47161-9.--Conference: 344th Symposium of the International-Astronomical-Union (IAU), Vienna, Austria, Aug 20-24, 2018. The hosts of long Gamma-ray bursts (GRBs) are places of intense star-formation, which, at low redshift, are primarily low-mass dwarf starburst galaxies. Spatially resolved studies of these galaxies are still sparse, even more so at high spectral resolution where we can probe gas kinematics, in- and outflows and differences in abundance between different components. Here we present the first high resolution IFU sample of six low redshift GRB hosts, all dwarf starbursts. All galaxies in our sample show evidence for excess emission or broad emission components, with velocities of 100-200 kms(-1). For GRB 030329, outflowing gas had also been observed in absorption in spectra of the GRB afterglow. The high velocity emission is usually blue shifted, connected to the brightest star-forming regions and more metal rich than the narrow component associated with the emission of the general host ISM. This gives strong indications that the excess emission/broad component is indeed associated to a starburst wind as observed in many field star-burst galaxies and a sign for the intense ongoing star-formation in those galaxies. |
| Databáze: | OpenAIRE |
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