The high-redshift gamma-ray burst GRB 140515A
Abstract
High-redshift gamma-ray bursts (GRBs) offer several advantages when studying the distant Universe, providing unique information about the structure and properties of the galaxies in which they exploded. Spectroscopic identification with large ground-based telescopes has improved our knowledge of this kind of distant events. We present the multi-wavelength analysis of the high-zSwift GRB GRB 140515A (z = 6.327). The best estimate of the neutral hydrogen fraction of the intergalactic medium towards the burst is xHI ≤ 0.002. The spectral absorption lines detected for this event are the weakest lines ever observed in GRB afterglows, suggesting that GRB 140515A exploded in a very low-density environment. Its circum-burst medium is characterised by an average extinction (AV ~ 0.1) that seems to be typical of z ≥ 6 events. The observed multi-band light curves are explained either with a very hard injected spectrum (p = 1.7) or with a multi-component emission (p = 2.1). In the second case a long-lasting central engine activity is needed in order to explain the late time X-ray emission. Furthermore, the possible origin of GRB 140515A in a Pop III (or in a Pop II star with a local environment enriched by Pop III) massive star is unlikely.
- Authors:
-
more »
- INAF-Osservatorio Astronomico Brera, Merate (Italy)
- Instituto de Astrofisica de Andalucia (IAA-CSIC), Granada (Spain); Univ. del Pais Vasco (UPV/EHU), Bilbao (Spain); Basque Foundation for Science, Bilbao (Spain)
- INAF-Osservatorio Astronomico Brera, Merate (Italy); Univ. degli Studi dell'Insubria, Como (Italy)
- The Hebrew Univ. of Jerusalem, Jerusalem (Israel)
- Univ. of Ljubljana, Ljubljana (Slovenia)
- Instituto de Astrofisica de Andalucia (IAA-CSIC), Granada (Spain); Univ. of Copenhagen, Copenhagen (Denmark)
- Instituto de Astrofisica de Andalucia (IAA-CSIC), Granada (Spain)
- ASI - Science Data Center, Roma (Italy); INAF - Osservatorio Astronomico di Roma, Monte Porzio Catone (Italy)
- Stockholm Univ., Stockholm (Sweden)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)
- Univ. Paris Diderot, Paris (France)
- Univ. of Copenhagen, Copenhagen (Denmark)
- INAF - IASF Milano, Milano (Italy)
- INAF-Osservatorio Astronomico Brera, Merate (Italy); Univ. Paris Diderot, Meudon (France)
- Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Copenhagen, Copenhagen (Denmark)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1212678
- Report Number(s):
- FERMILAB-PUB-15-294-A
Journal ID: ISSN 0004-6361; arXiv eprint number arXiv:1506.03079
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Astronomy and Astrophysics
- Additional Journal Information:
- Journal Volume: 581; Journal Issue: 9; Journal ID: ISSN 0004-6361
- Publisher:
- EDP Sciences
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; gamma-ray burst: general; gamma-ray burst: individual: GRB 140515A; galaxies: high-redshift; intergalactic medium
Citation Formats
Melandri, A., Bernardini, M. G., D'Avanzo, P. D., Sanchez-Ramirez, R., Nappo, F., Nava, L., Japelj, J., de Ugarte Postigo, A., Oates, S., Campana, S., Covino, S., D'Elia, V., Ghirlanda, G., Gafton, E., Ghisellini, G., Gnedin, N., Goldoni, P., Gorosabel, J., Libbrecht, T., Malesani, D., Salvaterra, R., Thone, C. C., Vergani, S. D., Xu, D., and Tagliaferri, G. The high-redshift gamma-ray burst GRB 140515A. United States: N. p., 2015.
Web. doi:10.1051/0004-6361/201526660.
Melandri, A., Bernardini, M. G., D'Avanzo, P. D., Sanchez-Ramirez, R., Nappo, F., Nava, L., Japelj, J., de Ugarte Postigo, A., Oates, S., Campana, S., Covino, S., D'Elia, V., Ghirlanda, G., Gafton, E., Ghisellini, G., Gnedin, N., Goldoni, P., Gorosabel, J., Libbrecht, T., Malesani, D., Salvaterra, R., Thone, C. C., Vergani, S. D., Xu, D., & Tagliaferri, G. The high-redshift gamma-ray burst GRB 140515A. United States. https://doi.org/10.1051/0004-6361/201526660
Melandri, A., Bernardini, M. G., D'Avanzo, P. D., Sanchez-Ramirez, R., Nappo, F., Nava, L., Japelj, J., de Ugarte Postigo, A., Oates, S., Campana, S., Covino, S., D'Elia, V., Ghirlanda, G., Gafton, E., Ghisellini, G., Gnedin, N., Goldoni, P., Gorosabel, J., Libbrecht, T., Malesani, D., Salvaterra, R., Thone, C. C., Vergani, S. D., Xu, D., and Tagliaferri, G. Wed .
"The high-redshift gamma-ray burst GRB 140515A". United States. https://doi.org/10.1051/0004-6361/201526660. https://www.osti.gov/servlets/purl/1212678.
@article{osti_1212678,
title = {The high-redshift gamma-ray burst GRB 140515A},
author = {Melandri, A. and Bernardini, M. G. and D'Avanzo, P. D. and Sanchez-Ramirez, R. and Nappo, F. and Nava, L. and Japelj, J. and de Ugarte Postigo, A. and Oates, S. and Campana, S. and Covino, S. and D'Elia, V. and Ghirlanda, G. and Gafton, E. and Ghisellini, G. and Gnedin, N. and Goldoni, P. and Gorosabel, J. and Libbrecht, T. and Malesani, D. and Salvaterra, R. and Thone, C. C. and Vergani, S. D. and Xu, D. and Tagliaferri, G.},
abstractNote = {High-redshift gamma-ray bursts (GRBs) offer several advantages when studying the distant Universe, providing unique information about the structure and properties of the galaxies in which they exploded. Spectroscopic identification with large ground-based telescopes has improved our knowledge of this kind of distant events. We present the multi-wavelength analysis of the high-zSwift GRB GRB 140515A (z = 6.327). The best estimate of the neutral hydrogen fraction of the intergalactic medium towards the burst is xHI ≤ 0.002. The spectral absorption lines detected for this event are the weakest lines ever observed in GRB afterglows, suggesting that GRB 140515A exploded in a very low-density environment. Its circum-burst medium is characterised by an average extinction (AV ~ 0.1) that seems to be typical of z ≥ 6 events. The observed multi-band light curves are explained either with a very hard injected spectrum (p = 1.7) or with a multi-component emission (p = 2.1). In the second case a long-lasting central engine activity is needed in order to explain the late time X-ray emission. Furthermore, the possible origin of GRB 140515A in a Pop III (or in a Pop II star with a local environment enriched by Pop III) massive star is unlikely.},
doi = {10.1051/0004-6361/201526660},
journal = {Astronomy and Astrophysics},
number = 9,
volume = 581,
place = {United States},
year = {Wed Sep 09 00:00:00 EDT 2015},
month = {Wed Sep 09 00:00:00 EDT 2015}
}
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- The Astrophysical Journal, Vol. 885, Issue 1
The properties of GRB 120923A at a spectroscopic redshift of z=7.8
text, January 2017
- Tanvir, N. R.; Laskar, T.; Levan, A. J.
- arXiv
Modeling the Multi-band Afterglows of GRB 060614 and GRB 060908: Further Evidence for a Double Power-Law Hard Electron Energy Spectrum
text, January 2018
- Zhang, Q.; Xiong, S. L.; Song, L. M.
- arXiv
The X-shooter GRB afterglow legacy sample (XS-GRB)
text, January 2018
- Selsing, J.; Malesani, D.; Goldoni, P.
- arXiv
The fraction of ionizing radiation from massive stars that escapes to the intergalactic medium
text, January 2018
- Tanvir, N. R.; Fynbo, J. P. U.; Postigo, A. de Ugarte
- arXiv
X-shooting GRBs at high redshift: probing dust production history
text, January 2018
- Zafar, T.; Møller, P.; Watson, D.
- arXiv