Spatially-resolved dust properties of the GRB 980425 host galaxy

M. J. Michalowski; L. K. Hunt; E. Palazzi; S. Savaglio; Gianfranco Gentile; J. Rasmussen; Maarten Baes; S. Basa; S. Bianchi; S. Berta; D. Burlon; J. M. Castro Ceron; S. Covino; J. -G. Cuby; V. D'Elia; P. Ferrero; D. Goetz; J. Hjorth; M. P. Koprowski; D. Le Borgne; E. Le Floc'h; D. Malesani; T. Murphy; E. Pian; S. Piranomonte; A. Rossi; J. Sollerman; N. R. Tanvir; A. de Ugarte Postigo; D. Watson; P. van der Werf; S. D. Vergani; D. Xu

doi:10.1051/0004-6361/201322843

Spatially-resolved dust properties of the GRB 980425 host galaxy

M. J. Michalowski, L. K. Hunt, E. Palazzi, S. Savaglio, Gianfranco Gentile, J. Rasmussen, Maarten Baes, S. Basa, S. Bianchi, S. Berta, D. Burlon, J. M. Castro Ceron, S. Covino, J. -G. Cuby, V. D'Elia, P. Ferrero, D. Goetz, J. Hjorth, M. P. Koprowski, D. Le BorgneE. Le Floc'h, D. Malesani, T. Murphy, E. Pian, S. Piranomonte, A. Rossi, J. Sollerman, N. R. Tanvir, A. de Ugarte Postigo, D. Watson, P. van der Werf, S. D. Vergani, D. Xu

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Abstract

Gamma-ray bursts (GRBs) have been proposed as a tool for studying star formation in the Universe, so it is crucial to investigate whether their host galaxies and immediate environments are in any way special compared with other star-forming galaxies. Here we present spatially resolved maps of dust emission of the host galaxyof the closest known GRB 980425 at z = 0.0085 using our new high-resolution observations from Herschel, Atacama Pathfinder Experiment (APEX), Atacama Large Millimeter Array (ALMA) and Australia Telescope Compact Array (ATCA). We modelled the spectral energy distributions of the host and of the star-forming region displaying the Wolf-Rayet signatures in the spectrum (WR region), located 800 pc from the GRB position. The host is characterised by low dust content and a high fraction of UV-visible star formation, similar to other dwarf galaxies. These galaxies are abundant in the local universe, so it is not surprising to find a GRB in one of them, assuming the correspondence between the GRB rate and star formation. The WR region contributes substantially to the host emission at the far-infrared, millimetre, and radio wavelengths and we propose that this is a consequence of its high gas density. If dense environments are also found close to the positions of other GRBs, then the ISM density should also be considered, along with metallicity, an important factor influencing whether a given stellar population can produce a GRB.

Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.

Reduced images as FITS files are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/562/A70.

Original language	English
Article number	A70
Number of pages	13
Journal	Astronomy & Astrophysics
Volume	562
DOIs	https://doi.org/10.1051/0004-6361/201322843
Publication status	Published - Feb 2014

Keywords

dust, extinction
galaxies: individual: ESO 184-G82
galaxies: star formation
submillimeter: galaxies
gamma-ray burst: individual: 980425
galaxies: ISM

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Michalowski, M. J., Hunt, L. K., Palazzi, E., Savaglio, S., Gentile, G., Rasmussen, J., Baes, M., Basa, S., Bianchi, S., Berta, S., Burlon, D., Castro Ceron, J. M., Covino, S., Cuby, J. .-G., D'Elia, V., Ferrero, P., Goetz, D., Hjorth, J., Koprowski, M. P., ... Xu, D. (2014). Spatially-resolved dust properties of the GRB 980425 host galaxy. Astronomy & Astrophysics, 562, Article A70. https://doi.org/10.1051/0004-6361/201322843

@article{edb26ad0fb064f6aa8019e798f685b66,

title = "Spatially-resolved dust properties of the GRB 980425 host galaxy",

abstract = "Gamma-ray bursts (GRBs) have been proposed as a tool for studying star formation in the Universe, so it is crucial to investigate whether their host galaxies and immediate environments are in any way special compared with other star-forming galaxies. Here we present spatially resolved maps of dust emission of the host galaxyof the closest known GRB 980425 at z = 0.0085 using our new high-resolution observations from Herschel, Atacama Pathfinder Experiment (APEX), Atacama Large Millimeter Array (ALMA) and Australia Telescope Compact Array (ATCA). We modelled the spectral energy distributions of the host and of the star-forming region displaying the Wolf-Rayet signatures in the spectrum (WR region), located 800 pc from the GRB position. The host is characterised by low dust content and a high fraction of UV-visible star formation, similar to other dwarf galaxies. These galaxies are abundant in the local universe, so it is not surprising to find a GRB in one of them, assuming the correspondence between the GRB rate and star formation. The WR region contributes substantially to the host emission at the far-infrared, millimetre, and radio wavelengths and we propose that this is a consequence of its high gas density. If dense environments are also found close to the positions of other GRBs, then the ISM density should also be considered, along with metallicity, an important factor influencing whether a given stellar population can produce a GRB.Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Reduced images as FITS files are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/562/A70.",

keywords = "dust, extinction, galaxies: individual: ESO 184-G82, galaxies: star formation, submillimeter: galaxies, gamma-ray burst: individual: 980425, galaxies: ISM",

author = "Michalowski, {M. J.} and Hunt, {L. K.} and E. Palazzi and S. Savaglio and Gianfranco Gentile and J. Rasmussen and Maarten Baes and S. Basa and S. Bianchi and S. Berta and D. Burlon and {Castro Ceron}, {J. M.} and S. Covino and Cuby, {J. -G.} and V. D'Elia and P. Ferrero and D. Goetz and J. Hjorth and Koprowski, {M. P.} and {Le Borgne}, D. and {Le Floc'h}, E. and D. Malesani and T. Murphy and E. Pian and S. Piranomonte and A. Rossi and J. Sollerman and Tanvir, {N. R.} and {de Ugarte Postigo}, A. and D. Watson and {van der Werf}, P. and Vergani, {S. D.} and D. Xu",

year = "2014",

month = feb,

doi = "10.1051/0004-6361/201322843",

language = "English",

volume = "562",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Michalowski, MJ, Hunt, LK, Palazzi, E, Savaglio, S, Gentile, G, Rasmussen, J, Baes, M, Basa, S, Bianchi, S, Berta, S, Burlon, D, Castro Ceron, JM, Covino, S, Cuby, J-G, D'Elia, V, Ferrero, P, Goetz, D, Hjorth, J, Koprowski, MP, Le Borgne, D, Le Floc'h, E, Malesani, D, Murphy, T, Pian, E, Piranomonte, S, Rossi, A, Sollerman, J, Tanvir, NR, de Ugarte Postigo, A, Watson, D, van der Werf, P, Vergani, SD & Xu, D 2014, 'Spatially-resolved dust properties of the GRB 980425 host galaxy', Astronomy & Astrophysics, vol. 562, A70. https://doi.org/10.1051/0004-6361/201322843

TY - JOUR

T1 - Spatially-resolved dust properties of the GRB 980425 host galaxy

AU - Michalowski, M. J.

AU - Hunt, L. K.

AU - Palazzi, E.

AU - Savaglio, S.

AU - Gentile, Gianfranco

AU - Rasmussen, J.

AU - Baes, Maarten

AU - Basa, S.

AU - Bianchi, S.

AU - Berta, S.

AU - Burlon, D.

AU - Castro Ceron, J. M.

AU - Covino, S.

AU - Cuby, J. -G.

AU - D'Elia, V.

AU - Ferrero, P.

AU - Goetz, D.

AU - Hjorth, J.

AU - Koprowski, M. P.

AU - Le Borgne, D.

AU - Le Floc'h, E.

AU - Malesani, D.

AU - Murphy, T.

AU - Pian, E.

AU - Piranomonte, S.

AU - Rossi, A.

AU - Sollerman, J.

AU - Tanvir, N. R.

AU - de Ugarte Postigo, A.

AU - Watson, D.

AU - van der Werf, P.

AU - Vergani, S. D.

AU - Xu, D.

PY - 2014/2

Y1 - 2014/2

N2 - Gamma-ray bursts (GRBs) have been proposed as a tool for studying star formation in the Universe, so it is crucial to investigate whether their host galaxies and immediate environments are in any way special compared with other star-forming galaxies. Here we present spatially resolved maps of dust emission of the host galaxyof the closest known GRB 980425 at z = 0.0085 using our new high-resolution observations from Herschel, Atacama Pathfinder Experiment (APEX), Atacama Large Millimeter Array (ALMA) and Australia Telescope Compact Array (ATCA). We modelled the spectral energy distributions of the host and of the star-forming region displaying the Wolf-Rayet signatures in the spectrum (WR region), located 800 pc from the GRB position. The host is characterised by low dust content and a high fraction of UV-visible star formation, similar to other dwarf galaxies. These galaxies are abundant in the local universe, so it is not surprising to find a GRB in one of them, assuming the correspondence between the GRB rate and star formation. The WR region contributes substantially to the host emission at the far-infrared, millimetre, and radio wavelengths and we propose that this is a consequence of its high gas density. If dense environments are also found close to the positions of other GRBs, then the ISM density should also be considered, along with metallicity, an important factor influencing whether a given stellar population can produce a GRB.Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Reduced images as FITS files are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/562/A70.

AB - Gamma-ray bursts (GRBs) have been proposed as a tool for studying star formation in the Universe, so it is crucial to investigate whether their host galaxies and immediate environments are in any way special compared with other star-forming galaxies. Here we present spatially resolved maps of dust emission of the host galaxyof the closest known GRB 980425 at z = 0.0085 using our new high-resolution observations from Herschel, Atacama Pathfinder Experiment (APEX), Atacama Large Millimeter Array (ALMA) and Australia Telescope Compact Array (ATCA). We modelled the spectral energy distributions of the host and of the star-forming region displaying the Wolf-Rayet signatures in the spectrum (WR region), located 800 pc from the GRB position. The host is characterised by low dust content and a high fraction of UV-visible star formation, similar to other dwarf galaxies. These galaxies are abundant in the local universe, so it is not surprising to find a GRB in one of them, assuming the correspondence between the GRB rate and star formation. The WR region contributes substantially to the host emission at the far-infrared, millimetre, and radio wavelengths and we propose that this is a consequence of its high gas density. If dense environments are also found close to the positions of other GRBs, then the ISM density should also be considered, along with metallicity, an important factor influencing whether a given stellar population can produce a GRB.Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Reduced images as FITS files are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/562/A70.

KW - dust, extinction

KW - galaxies: individual: ESO 184-G82

KW - galaxies: star formation

KW - submillimeter: galaxies

KW - gamma-ray burst: individual: 980425

KW - galaxies: ISM

U2 - 10.1051/0004-6361/201322843

DO - 10.1051/0004-6361/201322843

M3 - Article

SN - 0004-6361

VL - 562

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - A70

ER -

Spatially-resolved dust properties of the GRB 980425 host galaxy

Abstract

Keywords

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