GRB 190114C in the nuclear region of an interacting galaxy

Postigo, A. de Ugarte; Thöne, C. C.; Martín, S.; Japelj, J.; Levan, A. J.; Michałowski, M. J.; Selsing, J.; Канн, Д. А.; Schulze, S.; Palmerio, J.; Vergani, S. D.; Tanvir, N. R.; Bensch, K.; Covino, S.; D’Elia, V.; Pasquale, M. De; Fruchter, A.; Fynbo, J. P. U.; Hartmann, D. H.; Heintz, K. E.; Horst, A. J. van der; Izzo, L.; Jakobsson, P.; Ng, Kenny C. Y.; Perley, D. A.; Rossi, A.; Sbarufatti, B.; Salvaterra, R.; Sánchez-Ramírez, R.; Watson, Darach; Xu, Da

doi:10.1051/0004-6361/201936668

Cited by 23 publications

(20 citation statements)

References 97 publications

(119 reference statements)

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“…The derived molecular gas mass is (0.2-6) × 10 10 M ⊙ (Table 4), which is comparable to that of GRB hosts at similar redshifts reported in the literature Stanway et al 2015b;Micha lowski et al 2018a;Arabsalmani et al 2018;Hatsukade et al 2019;de Ugarte Postigo et al 2020). Figures 6 and 7 show the molecular gas mass as a function of redshift and stellar mass, respectively.…”

Section: Molecular Gas Masssupporting

confidence: 82%

“…Searches for CO line emission have been conducted to probe molecular gas in GRB hosts (Kohno et al 2005;Endo et al 2007;Hatsukade et al 2007Hatsukade et al , 2011Stanway et al 2011). So far, six GRB hosts have been detected in CO emission: GRB 980425 at z = 0.0085 (Micha lowski et al 2018a), GRB 051022 at z = 0.809 (Hatsukade et al 2014), GRB 080207 at z = 2.0858 (Arabsalmani et al 2018;Micha lowski et al 2018a;Hatsukade et al 2019), GRB 080517 at z = 0.089 (Stanway et al 2015b), GRB 111005A at z = 0.01326 (Micha lowski et al 2018a), and 190114C at z = 0.425 (de Ugarte Postigo et al 2020). Earlier works have suggested a deficiency of molecular gas in GRB hosts for their star formation rate (SFR) or stellar mass (Hatsukade et al 2014;Stanway et al 2015b;Micha lowski et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…They combined the hosts with previous CO observations and found that the GRB hosts have molecular properties that are consistent with those of other galaxies. Recently, de Ugarte Postigo et al (2020) detected the CO(3-2) line in an interacting galaxy hosting GRB 190114C at z = 0.425 and found a high molecular gas fraction.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

ALMA CO Observations of the Host Galaxies of Long-duration Gamma-Ray Bursts. I. Molecular Gas Scaling Relations

Hatsukade

Ohta

Hashimoto

et al. 2020

ApJ

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We present the results of CO observations toward 14 host galaxies of long-duration gamma-ray bursts (GRBs) at z = 0.1-2.5 by using the Atacama Large Millimeter/submillimeter Array. We successfully detected CO(3-2) or CO(4-3) emission in eight hosts (z = 0.3-2), which more than doubles the sample size of GRB hosts with CO detection. The derived molecular gas mass is M gas = (0.2-6) × 10 10 M ⊙ assuming metallicity-dependent CO-to-H 2 conversion factors. By using the largest sample of GRB hosts with molecular gas estimates (25 in total, of which 14 are CO-detected) including results from the literature, we compared molecular gas properties with those of other star-forming galaxies (SFGs). The GRB hosts tend to have a higher molecular gas mass fraction (µ gas ) and a shorter gas depletion timescale (t depl ) as compared with other SFGs at similar redshifts especially at z 1. This could be a common property of GRB hosts or an effect introduced by the selection of targets which are typically above the main-sequence line. To eliminate the effect of selection bias, we analyzed µ gas and t depl as a function of the distance from the main-sequence line (δMS). We find that the GRB hosts follow the same scaling relations as other SFGs, where µ gas increases and t depl decreases with increasing δMS. No molecular gas deficit is observed when compared to other SFGs of similar SFR and stellar mass. These findings suggest that the same star-formation mechanism is expected to be happening in GRB hosts as in other SFGs.

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Section: Molecular Gas Masssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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ALMA CO Observations of the Host Galaxies of Long-duration Gamma-Ray Bursts. I. Molecular Gas Scaling Relations

Hatsukade

Ohta

Hashimoto

et al. 2020

ApJ

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“…Arcodia et al 2018). In addition, the optical absorption is high E(B − V ) ∼ 0.83, supporting the evidence for a high intrinsic absorption (de Ugarte Postigo et al 2020). Remarkably, observations by the MAGIC collaboration also revealed teraelectronvolt (TeV) emission, the first time from a GRB (MAGIC Collaboration et al 2019b).…”

Section: Introductionsupporting

confidence: 52%

The variable absorption in the X-ray spectrum of GRB 190114C

Campana

Lazzati

Perna

et al. 2021

A&A

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Gamma-ray burst (GRB) 190114C was a bright burst that occurred in the local Universe (z = 0.425). It was the first GRB ever detected at teraelectronvolt (TeV) energies, and this was thanks to MAGIC. We characterize the ambient medium properties of the host galaxy through the study of the absorbing X-ray column density. Using a combination of Swift, XMM-Newton, and NuSTAR observations, we find that the GRB X-ray spectrum is characterized by a high column density that is well in excess of the expected Milky Way value and decreases, by a factor of ∼2, around ∼105 s. Such a variability is not common in GRBs. The most straightforward interpretation of the variability in terms of the photoionization of the ambient medium is not able to account for the decrease at such late times, when the source flux is less intense. Instead, we interpret the decrease as due to a clumped absorber, denser along the line of sight and surrounded by lower-density gas. After the detection at TeV energies of GRB 190114C, two other GRBs were promptly detected. These two also have high intrinsic column density values, and there are hints for a decrease in their column densities as well. We speculate that a high local column density might be a common ingredient of TeV-detected GRBs.

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“…GRB190114C. The host-galaxy system of GRB190114C is composed of two galaxies, a close pair merger system (Postigo et al 2020). Drawing from their observations, there are several possible factors that may explain the very high intrinsic N HX in this lowredshift GRB.…”

Section: Discussion a N D C O M Pa R I S O N W I T H Ot H E R S T U D I E Smentioning

confidence: 99%

Probing the physical properties of the intergalactic medium using gamma-ray bursts

Dalton

Morris

Fumagalli

2021

Monthly Notices of the Royal Astronomical Society

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We use Gamma-ray burst (GRB) spectra total continuum absorption to estimate the key intergalactic medium (IGM) properties of hydrogen column density ($\mathit {N}_{\mathrm{HXIGM}}$), metallicity, temperature and ionisation parameter over a redshift range of 1.6 ≤ z ≤ 6.3, using photo-ionisation (PIE) and collisional ionisation equilibrium (CIE) models for the ionised plasma. We use more realistic host metallicity, dust corrected where available, in generating the host absorption model, assuming that the host intrinsic hydrogen column density is equal to the measured ionisation corrected intrinsic neutral column from UV spectra (${\it N}_{\mathrm{H}\, \rm \small {I,IC}}$). We find that the IGM property results are similar, regardless of whether the model assumes all PIE or CIE. The $\mathit {N}_{\mathrm{HXIGM}}$ scales as (1 + z)1.0 − 1.9, with equivalent hydrogen mean density at z = 0 of $n_0 = 1.8^{+1.5}_{-1.2} \times 10^{-7}$ cm−3. The metallicity ranges from ∼0.1 Z⊙ at z ∼ 2 to ∼0.001 Z⊙ at redshift z > 4. The PIE model implies a less rapid decline in average metallicity with redshift compared to CIE. Under CIE, the temperature ranges between 5.0 < log (T/K) < 7.1. For PIE the ionisation parameter ranges between 0.1 < log (ξ) < 2.9. Using our model, we conclude that the IGM contributes substantially to the total absorption seen in GRB spectra and that this contribution rises with redshift, explaining why the hydrogen column density inferred from X-rays is substantially in excess of the intrinsic host contribution measured in UV.

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GRB 190114C in the nuclear region of an interacting galaxy

Cited by 23 publications

References 97 publications

ALMA CO Observations of the Host Galaxies of Long-duration Gamma-Ray Bursts. I. Molecular Gas Scaling Relations

ALMA CO Observations of the Host Galaxies of Long-duration Gamma-Ray Bursts. I. Molecular Gas Scaling Relations

The variable absorption in the X-ray spectrum of GRB 190114C

Probing the physical properties of the intergalactic medium using gamma-ray bursts

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