Super-solar metallicity at the position of the ultra-long GRB 130925A

Patricia Schady, Thomas Krühler, Jochen Greiner, John Graham, David Alexander Kann, Jan Bolmer, Corentin Delvaux, Jonny Elliott, Sylvio Klose, Fabian Knust, Anna Nicuesa Guelbenzu, Arne Rau, Andrea Rossi, Sandra Savaglio, Sebastian Schmidl, Tassilo Schweyer, Vladimir Sudilovsky, Mohit Tanga, Nial Tanvir, Karla Varela & 1 others Philip Wiseman

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Over the last decade there has been immense progress in the follow-up of short and long gamma-ray bursts (GRBs), resulting in a significant rise in the detection rate of X-ray and optical afterglows, in the determination of GRB redshifts, and of the identification of the underlying host galaxies. Nevertheless, our theoretical understanding of the progenitors and central engines powering these vast explosions is lagging behind, and a newly identified class of ultra-long GRBs has fuelled speculation on the existence of a new channel of GRB formation. In this paper we present high signal-to-noise X-Shooter observations of the host galaxy of GRB 130925A, which is the fourth unambiguously identified ultra-long GRB, with prompt γ-ray emission detected for ~20 ks. The GRB line of sight was close to the host galaxy nucleus, and our spectroscopic observations cover this region along the bulge/disk of the galaxy and a bright star-forming region within the outskirts of the galaxy. From our broad wavelength coverage, we obtain accurate metallicity and dust-extinction measurements at the galaxy nucleus and at an outer star-forming region, and measure a super-solar metallicity at both locations, placing this galaxy within the 10–20% most metal-rich GRB host galaxies. Such a high metal enrichment has significant implications on the progenitor models of both long and ultra-long GRBs, although the edge-on orientation of the host galaxy does not allow us to rule out a large metallicity variation along our line of sight. The spatially resolved spectroscopic observations presented in this paper offer important insight into variations in the metal and dust abundance within GRB host galaxies. However, they also illustrate the need for integral field unit observations on a larger sample of GRB host galaxies of a variety of metallicities to provide a more quantitative view on the relation between the GRB circumburst environment and the galaxy-whole properties.
Original languageEnglish
Article numberA126
Pages (from-to)1-9
Number of pages9
JournalAstronomy & Astrophysics
Volume579
Early online date15 Jul 2015
DOIs
Publication statusPublished - 31 Jul 2015

Fingerprint

gamma ray bursts
metallicity
galaxies
metal
dust
explosion
engine
extinction
wavelength
line of sight
metals
stars
nuclei
afterglows
engines
explosions
gamma rays

Cite this

Schady, P., Krühler, T., Greiner, J., Graham, J., Kann, D. A., Bolmer, J., ... Wiseman, P. (2015). Super-solar metallicity at the position of the ultra-long GRB 130925A. Astronomy & Astrophysics, 579, 1-9. [A126]. https://doi.org/10.1051/0004-6361/201526060

Super-solar metallicity at the position of the ultra-long GRB 130925A. / Schady, Patricia; Krühler, Thomas; Greiner, Jochen; Graham, John; Kann, David Alexander; Bolmer, Jan; Delvaux, Corentin; Elliott, Jonny; Klose, Sylvio; Knust, Fabian; Nicuesa Guelbenzu, Anna; Rau, Arne; Rossi, Andrea; Savaglio, Sandra; Schmidl, Sebastian; Schweyer, Tassilo; Sudilovsky, Vladimir; Tanga, Mohit; Tanvir, Nial; Varela, Karla; Wiseman, Philip.

In: Astronomy & Astrophysics, Vol. 579, A126, 31.07.2015, p. 1-9.

Research output: Contribution to journalArticle

Schady, P, Krühler, T, Greiner, J, Graham, J, Kann, DA, Bolmer, J, Delvaux, C, Elliott, J, Klose, S, Knust, F, Nicuesa Guelbenzu, A, Rau, A, Rossi, A, Savaglio, S, Schmidl, S, Schweyer, T, Sudilovsky, V, Tanga, M, Tanvir, N, Varela, K & Wiseman, P 2015, 'Super-solar metallicity at the position of the ultra-long GRB 130925A', Astronomy & Astrophysics, vol. 579, A126, pp. 1-9. https://doi.org/10.1051/0004-6361/201526060
Schady, Patricia ; Krühler, Thomas ; Greiner, Jochen ; Graham, John ; Kann, David Alexander ; Bolmer, Jan ; Delvaux, Corentin ; Elliott, Jonny ; Klose, Sylvio ; Knust, Fabian ; Nicuesa Guelbenzu, Anna ; Rau, Arne ; Rossi, Andrea ; Savaglio, Sandra ; Schmidl, Sebastian ; Schweyer, Tassilo ; Sudilovsky, Vladimir ; Tanga, Mohit ; Tanvir, Nial ; Varela, Karla ; Wiseman, Philip. / Super-solar metallicity at the position of the ultra-long GRB 130925A. In: Astronomy & Astrophysics. 2015 ; Vol. 579. pp. 1-9.
@article{27706e992bf3419994a1f139d83754c6,
title = "Super-solar metallicity at the position of the ultra-long GRB 130925A",
abstract = "Over the last decade there has been immense progress in the follow-up of short and long gamma-ray bursts (GRBs), resulting in a significant rise in the detection rate of X-ray and optical afterglows, in the determination of GRB redshifts, and of the identification of the underlying host galaxies. Nevertheless, our theoretical understanding of the progenitors and central engines powering these vast explosions is lagging behind, and a newly identified class of ultra-long GRBs has fuelled speculation on the existence of a new channel of GRB formation. In this paper we present high signal-to-noise X-Shooter observations of the host galaxy of GRB 130925A, which is the fourth unambiguously identified ultra-long GRB, with prompt γ-ray emission detected for ~20 ks. The GRB line of sight was close to the host galaxy nucleus, and our spectroscopic observations cover this region along the bulge/disk of the galaxy and a bright star-forming region within the outskirts of the galaxy. From our broad wavelength coverage, we obtain accurate metallicity and dust-extinction measurements at the galaxy nucleus and at an outer star-forming region, and measure a super-solar metallicity at both locations, placing this galaxy within the 10–20{\%} most metal-rich GRB host galaxies. Such a high metal enrichment has significant implications on the progenitor models of both long and ultra-long GRBs, although the edge-on orientation of the host galaxy does not allow us to rule out a large metallicity variation along our line of sight. The spatially resolved spectroscopic observations presented in this paper offer important insight into variations in the metal and dust abundance within GRB host galaxies. However, they also illustrate the need for integral field unit observations on a larger sample of GRB host galaxies of a variety of metallicities to provide a more quantitative view on the relation between the GRB circumburst environment and the galaxy-whole properties.",
author = "Patricia Schady and Thomas Kr{\"u}hler and Jochen Greiner and John Graham and Kann, {David Alexander} and Jan Bolmer and Corentin Delvaux and Jonny Elliott and Sylvio Klose and Fabian Knust and {Nicuesa Guelbenzu}, Anna and Arne Rau and Andrea Rossi and Sandra Savaglio and Sebastian Schmidl and Tassilo Schweyer and Vladimir Sudilovsky and Mohit Tanga and Nial Tanvir and Karla Varela and Philip Wiseman",
year = "2015",
month = "7",
day = "31",
doi = "10.1051/0004-6361/201526060",
language = "English",
volume = "579",
pages = "1--9",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "Springer Verlag",

}

TY - JOUR

T1 - Super-solar metallicity at the position of the ultra-long GRB 130925A

AU - Schady, Patricia

AU - Krühler, Thomas

AU - Greiner, Jochen

AU - Graham, John

AU - Kann, David Alexander

AU - Bolmer, Jan

AU - Delvaux, Corentin

AU - Elliott, Jonny

AU - Klose, Sylvio

AU - Knust, Fabian

AU - Nicuesa Guelbenzu, Anna

AU - Rau, Arne

AU - Rossi, Andrea

AU - Savaglio, Sandra

AU - Schmidl, Sebastian

AU - Schweyer, Tassilo

AU - Sudilovsky, Vladimir

AU - Tanga, Mohit

AU - Tanvir, Nial

AU - Varela, Karla

AU - Wiseman, Philip

PY - 2015/7/31

Y1 - 2015/7/31

N2 - Over the last decade there has been immense progress in the follow-up of short and long gamma-ray bursts (GRBs), resulting in a significant rise in the detection rate of X-ray and optical afterglows, in the determination of GRB redshifts, and of the identification of the underlying host galaxies. Nevertheless, our theoretical understanding of the progenitors and central engines powering these vast explosions is lagging behind, and a newly identified class of ultra-long GRBs has fuelled speculation on the existence of a new channel of GRB formation. In this paper we present high signal-to-noise X-Shooter observations of the host galaxy of GRB 130925A, which is the fourth unambiguously identified ultra-long GRB, with prompt γ-ray emission detected for ~20 ks. The GRB line of sight was close to the host galaxy nucleus, and our spectroscopic observations cover this region along the bulge/disk of the galaxy and a bright star-forming region within the outskirts of the galaxy. From our broad wavelength coverage, we obtain accurate metallicity and dust-extinction measurements at the galaxy nucleus and at an outer star-forming region, and measure a super-solar metallicity at both locations, placing this galaxy within the 10–20% most metal-rich GRB host galaxies. Such a high metal enrichment has significant implications on the progenitor models of both long and ultra-long GRBs, although the edge-on orientation of the host galaxy does not allow us to rule out a large metallicity variation along our line of sight. The spatially resolved spectroscopic observations presented in this paper offer important insight into variations in the metal and dust abundance within GRB host galaxies. However, they also illustrate the need for integral field unit observations on a larger sample of GRB host galaxies of a variety of metallicities to provide a more quantitative view on the relation between the GRB circumburst environment and the galaxy-whole properties.

AB - Over the last decade there has been immense progress in the follow-up of short and long gamma-ray bursts (GRBs), resulting in a significant rise in the detection rate of X-ray and optical afterglows, in the determination of GRB redshifts, and of the identification of the underlying host galaxies. Nevertheless, our theoretical understanding of the progenitors and central engines powering these vast explosions is lagging behind, and a newly identified class of ultra-long GRBs has fuelled speculation on the existence of a new channel of GRB formation. In this paper we present high signal-to-noise X-Shooter observations of the host galaxy of GRB 130925A, which is the fourth unambiguously identified ultra-long GRB, with prompt γ-ray emission detected for ~20 ks. The GRB line of sight was close to the host galaxy nucleus, and our spectroscopic observations cover this region along the bulge/disk of the galaxy and a bright star-forming region within the outskirts of the galaxy. From our broad wavelength coverage, we obtain accurate metallicity and dust-extinction measurements at the galaxy nucleus and at an outer star-forming region, and measure a super-solar metallicity at both locations, placing this galaxy within the 10–20% most metal-rich GRB host galaxies. Such a high metal enrichment has significant implications on the progenitor models of both long and ultra-long GRBs, although the edge-on orientation of the host galaxy does not allow us to rule out a large metallicity variation along our line of sight. The spatially resolved spectroscopic observations presented in this paper offer important insight into variations in the metal and dust abundance within GRB host galaxies. However, they also illustrate the need for integral field unit observations on a larger sample of GRB host galaxies of a variety of metallicities to provide a more quantitative view on the relation between the GRB circumburst environment and the galaxy-whole properties.

U2 - 10.1051/0004-6361/201526060

DO - 10.1051/0004-6361/201526060

M3 - Article

VL - 579

SP - 1

EP - 9

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - A126

ER -