The host galaxy of GRB 980425 / SN1998bw: a collisional ring galaxy

Abstract

We report Giant Metrewave Radio Telescope (GMRT) , Very Large Telescope (VLT) and Spitzer Space Telescope observations of ESO 184$-$G82, the host galaxy of GRB 980425/SN 1998bw, that yield evidence of a companion dwarf galaxy at a projected distance of 13 kpc. The companion, hereafter GALJ193510-524947, is a gas-rich, star-forming galaxy with a star formation rate of $0.004{\mathrm{M}}_{\odot }\mathrm{y}{\mathrm{r}}^{-1}$, a gas mass of $10^{7.1\pm 0.1}{M}_{\odot }$, and a stellar mass of $10^{7.0\pm 0.3}{M}_{\odot }$. The interaction between ESO 184$-$G82 and GALJ193510-524947 is evident from the extended gaseous structure between the two galaxies in the GMRT HI 21 cm map. We find a ring of high column density HI gas, passing through the actively star forming regions of ESO 184$-$G82 and the GRB location. This ring lends support to the picture in which ESO 184$-$G82 is interacting with GALJ193510-524947. The massive stars in GALJ193510-524947 have similar ages to those in star-forming regions in ESO 184$-$G82, also suggesting that the interaction may have triggered star formation in both galaxies. The gas and star formation properties of ESO 184$-$G82 favour a head-on collision with GALJ193510-524947 rather than a classical tidal interaction. We perform state-of-the art simulations of dwarf--dwarf mergers and confirm that the observed properties of ESO 184$-$G82 can be reproduced by collision with a small companion galaxy. This is a very clear case of interaction in a gamma ray burst host galaxy, and of interaction-driven star formation giving rise to a gamma ray burst in a dense environment.

Accepted for publication in MNRAS. For the definitive version visit 'https://academic.oup.com/mnras'

References in corpus (27)

• Binary interaction dominates the evolution of massive stars
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• Long gamma-ray bursts and core-collapse supernovae have different environments
• Southern Massive Stars at High Angular Resolution: Observational Campaign and Companion Detection
• The High Angular Resolution Multiplicity of Massive Stars
• An optical supernova associated with the X-ray flash XRF 060218
• COLD GASS, an IRAM legacy survey of molecular gas in massive galaxies: I. Relations between H2, HI, stellar content and structural properties
• Star formation efficiency in galaxy interactions and mergers: a statistical study
• No supernovae associated with two long-duration gamma ray bursts
• The Galaxy Population Hosting Gamma-Ray Bursts
• UV star-formation rates of GRB host galaxies
• On the frequency, intensity and duration of starburst episodes triggered by galaxy interactions and mergers
• An excess of massive stars in the local 30 Doradus starburst
• On the Star Formation Rate - Brightest Cluster Relation: Estimating the peak SFR in post-merger galaxies
• Starbursts triggered by inter-galactic tides and interstellar compressive turbulence
• On the nature of nearby GRB/SN host galaxies
• Detection of Wolf-Rayet stars in host galaxies of Gamma-Ray Bursts (GRBs): are GRBs produced by runaway massive stars ejected from high stellar density regions ?
• On the Nature of Velocity Fields in High z Galaxies
• Gamma-Ray Bursts from tidally spun-up Wolf-Rayet stars?
• IFU observations of the GRB 980425/SN 1998bw host galaxy: emission line ratios in GRB regions
• Unveiling the Secrets of Metallicity and Massive Star Formation Using DLAs along Gamma-ray Bursts
• Rings and Bent Chain Galaxies in the GEMS and GOOD Fields
• Morphology and enhanced star formation in a Cartwheel-like ring galaxy
• Mass and metallicity scaling relations of high redshift star-forming galaxies selected by GRBs
• NGC922 - A new drop-through ring galaxy
• Super Star Cluster NGC1705-1: A Local Analogue to the Birthsite of Long-duration Gamma-ray Bursts
• Long gamma ray burst rate in the binary merger progenitor model

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