Very high column density and small reddening toward GRB 020124 at z = 3.20

J. Hjorth; P. Møller; J. Gorosabel; J. P.U. Fynbo; S. Toft; A. O. Jaunsen; A. A. Kaas; T. Pursimo; K. Torii; T. Kato; H. Yamaoka; A. Yoshida; B. Thomsen; M. I. Andersen; I. Burud; J. M. Castro Cerón; A. J. Castro-Tirado; A. S. Fruchter; L. Kaper; C. Kouveliotou; N. Masetti; E. Palazzi; H. Pedersen; E. Pian; J. Rhoads; E. Rol; N. R. Tanvir; P. M. Vreeswijk; R. A.M.J. Wijers; E. P.J. Van den Heuvel

doi:10.1086/378493

Very high column density and small reddening toward GRB 020124 at z = 3.20

J. Hjorth, P. Møller, J. Gorosabel, J. P.U. Fynbo, S. Toft, A. O. Jaunsen, A. A. Kaas, T. Pursimo, K. Torii, T. Kato, H. Yamaoka, A. Yoshida, B. Thomsen, M. I. Andersen, I. Burud, J. M. Castro Cerón, A. J. Castro-Tirado, A. S. Fruchter, L. Kaper, C. KouveliotouN. Masetti, E. Palazzi, H. Pedersen, E. Pian, J. Rhoads, E. Rol, N. R. Tanvir, P. M. Vreeswijk, R. A.M.J. Wijers, E. P.J. Van den Heuvel

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Abstract

We present optical and near-infrared observations of the dim afterglow of GRB 020124, obtained between 2 and 68 hr after the gamma-ray burst. The burst occurred in a very faint (R ≲ 29.5) damped Lyα absorber (DLA) at a redshift of z = 3.198 ± 0.004. The derived column density of neutral hydrogen is log(N_{H I}) = 21.7 ± 0.2, and the rest-frame reddening is constrained to be E(B- V) < 0.065, i.e., A_V < 0. 20 for standard extinction laws with R_v ≈ 3. The resulting dust-to-gas ratio is less than 11% of that found in the Milky Way but consistent with the SMC and high-redshift QSO DLAs, indicating a low metallicity and/or a low dust-to-metal ratio in the burst environment. A gray extinction law (large R_v), produced through preferential destruction of small dust grains by the gamma-ray burst, could increase the derived A _v and dust-to-gas ratio. The dimness of the afterglow is, however, fully accounted for by the high redshift: if GRB 020124 had been at z = 1, it would have been approximately 1.8 mag brighter - in the range of typical bright afterglows.

Original language	English (US)
Pages (from-to)	699-705
Number of pages	7
Journal	Astrophysical Journal
Volume	597
Issue number	2 I
DOIs	https://doi.org/10.1086/378493
State	Published - Nov 10 2003
Externally published	Yes

Keywords

Cosmology: observations
Dust, extinction
Galaxies: abundances galaxies: ISM
Gamma rays: bursts

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/378493

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Hjorth, J., Møller, P., Gorosabel, J., Fynbo, J. P. U., Toft, S., Jaunsen, A. O., Kaas, A. A., Pursimo, T., Torii, K., Kato, T., Yamaoka, H., Yoshida, A., Thomsen, B., Andersen, M. I., Burud, I., Castro Cerón, J. M., Castro-Tirado, A. J., Fruchter, A. S., Kaper, L., ... Van den Heuvel, E. P. J. (2003). Very high column density and small reddening toward GRB 020124 at z = 3.20. Astrophysical Journal, 597(2 I), 699-705. https://doi.org/10.1086/378493

Hjorth, J, Møller, P, Gorosabel, J, Fynbo, JPU, Toft, S, Jaunsen, AO, Kaas, AA, Pursimo, T, Torii, K, Kato, T, Yamaoka, H, Yoshida, A, Thomsen, B, Andersen, MI, Burud, I, Castro Cerón, JM, Castro-Tirado, AJ, Fruchter, AS, Kaper, L, Kouveliotou, C, Masetti, N, Palazzi, E, Pedersen, H, Pian, E, Rhoads, J, Rol, E, Tanvir, NR, Vreeswijk, PM, Wijers, RAMJ & Van den Heuvel, EPJ 2003, 'Very high column density and small reddening toward GRB 020124 at z = 3.20', Astrophysical Journal, vol. 597, no. 2 I, pp. 699-705. https://doi.org/10.1086/378493

@article{d3d14c1ea35b4fdaa0bbf6e2d4598b21,

title = "Very high column density and small reddening toward GRB 020124 at z = 3.20",

abstract = "We present optical and near-infrared observations of the dim afterglow of GRB 020124, obtained between 2 and 68 hr after the gamma-ray burst. The burst occurred in a very faint (R ≲ 29.5) damped Lyα absorber (DLA) at a redshift of z = 3.198 ± 0.004. The derived column density of neutral hydrogen is log(NH I) = 21.7 ± 0.2, and the rest-frame reddening is constrained to be E(B- V) < 0.065, i.e., AV < 0. 20 for standard extinction laws with Rv ≈ 3. The resulting dust-to-gas ratio is less than 11% of that found in the Milky Way but consistent with the SMC and high-redshift QSO DLAs, indicating a low metallicity and/or a low dust-to-metal ratio in the burst environment. A gray extinction law (large Rv), produced through preferential destruction of small dust grains by the gamma-ray burst, could increase the derived A v and dust-to-gas ratio. The dimness of the afterglow is, however, fully accounted for by the high redshift: if GRB 020124 had been at z = 1, it would have been approximately 1.8 mag brighter - in the range of typical bright afterglows.",

keywords = "Cosmology: observations, Dust, extinction, Galaxies: abundances galaxies: ISM, Gamma rays: bursts",

author = "J. Hjorth and P. M{\o}ller and J. Gorosabel and Fynbo, {J. P.U.} and S. Toft and Jaunsen, {A. O.} and Kaas, {A. A.} and T. Pursimo and K. Torii and T. Kato and H. Yamaoka and A. Yoshida and B. Thomsen and Andersen, {M. I.} and I. Burud and {Castro Cer{\'o}n}, {J. M.} and Castro-Tirado, {A. J.} and Fruchter, {A. S.} and L. Kaper and C. Kouveliotou and N. Masetti and E. Palazzi and H. Pedersen and E. Pian and J. Rhoads and E. Rol and Tanvir, {N. R.} and Vreeswijk, {P. M.} and Wijers, {R. A.M.J.} and {Van den Heuvel}, {E. P.J.}",

year = "2003",

month = nov,

day = "10",

doi = "10.1086/378493",

language = "English (US)",

volume = "597",

pages = "699--705",

journal = "Astrophysical Journal",

issn = "0004-637X",

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number = "2 I",

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TY - JOUR

T1 - Very high column density and small reddening toward GRB 020124 at z = 3.20

AU - Hjorth, J.

AU - Møller, P.

AU - Gorosabel, J.

AU - Fynbo, J. P.U.

AU - Toft, S.

AU - Jaunsen, A. O.

AU - Kaas, A. A.

AU - Pursimo, T.

AU - Torii, K.

AU - Kato, T.

AU - Yamaoka, H.

AU - Yoshida, A.

AU - Thomsen, B.

AU - Andersen, M. I.

AU - Burud, I.

AU - Castro Cerón, J. M.

AU - Castro-Tirado, A. J.

AU - Fruchter, A. S.

AU - Kaper, L.

AU - Kouveliotou, C.

AU - Masetti, N.

AU - Palazzi, E.

AU - Pedersen, H.

AU - Pian, E.

AU - Rhoads, J.

AU - Rol, E.

AU - Tanvir, N. R.

AU - Vreeswijk, P. M.

AU - Wijers, R. A.M.J.

AU - Van den Heuvel, E. P.J.

PY - 2003/11/10

Y1 - 2003/11/10

N2 - We present optical and near-infrared observations of the dim afterglow of GRB 020124, obtained between 2 and 68 hr after the gamma-ray burst. The burst occurred in a very faint (R ≲ 29.5) damped Lyα absorber (DLA) at a redshift of z = 3.198 ± 0.004. The derived column density of neutral hydrogen is log(NH I) = 21.7 ± 0.2, and the rest-frame reddening is constrained to be E(B- V) < 0.065, i.e., AV < 0. 20 for standard extinction laws with Rv ≈ 3. The resulting dust-to-gas ratio is less than 11% of that found in the Milky Way but consistent with the SMC and high-redshift QSO DLAs, indicating a low metallicity and/or a low dust-to-metal ratio in the burst environment. A gray extinction law (large Rv), produced through preferential destruction of small dust grains by the gamma-ray burst, could increase the derived A v and dust-to-gas ratio. The dimness of the afterglow is, however, fully accounted for by the high redshift: if GRB 020124 had been at z = 1, it would have been approximately 1.8 mag brighter - in the range of typical bright afterglows.

AB - We present optical and near-infrared observations of the dim afterglow of GRB 020124, obtained between 2 and 68 hr after the gamma-ray burst. The burst occurred in a very faint (R ≲ 29.5) damped Lyα absorber (DLA) at a redshift of z = 3.198 ± 0.004. The derived column density of neutral hydrogen is log(NH I) = 21.7 ± 0.2, and the rest-frame reddening is constrained to be E(B- V) < 0.065, i.e., AV < 0. 20 for standard extinction laws with Rv ≈ 3. The resulting dust-to-gas ratio is less than 11% of that found in the Milky Way but consistent with the SMC and high-redshift QSO DLAs, indicating a low metallicity and/or a low dust-to-metal ratio in the burst environment. A gray extinction law (large Rv), produced through preferential destruction of small dust grains by the gamma-ray burst, could increase the derived A v and dust-to-gas ratio. The dimness of the afterglow is, however, fully accounted for by the high redshift: if GRB 020124 had been at z = 1, it would have been approximately 1.8 mag brighter - in the range of typical bright afterglows.

KW - Cosmology: observations

KW - Dust, extinction

KW - Galaxies: abundances galaxies: ISM

KW - Gamma rays: bursts

UR - http://www.scopus.com/inward/record.url?scp=1042279846&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1042279846&partnerID=8YFLogxK

U2 - 10.1086/378493

DO - 10.1086/378493

M3 - Article

AN - SCOPUS:1042279846

SN - 0004-637X

VL - 597

SP - 699

EP - 705

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 I

ER -

Very high column density and small reddening toward GRB 020124 at z = 3.20

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