A double component in GRB 090618: a proto-black hole and a genuinely long GRB
arXiv:1202.4374 · doi:10.1051/0004-6361/201117436
Abstract
The joint X and gamma-ray observations of GRB 090618 by a large number of satellites offer an unprecedented possibility of testing crucial aspects of theoretical models. In particular, it allows us to test (a) the formation of an optically thick e+e- baryon plasma self-accelerating to Lorentz factors in the range 200 < g < 3000; (b) its transparency condition with the emission of a component of 10^{53-54} baryons in the TeV region and (c) the collision of these baryons with the circumburst medium clouds, characterized by dimensions of 10^{15-16} cm. In addition, these observations offer the possibility of testing a new understanding of the thermal and power-law components in the early phase of this GRB. We test the fireshell model of GRBs in one of the closest (z = 0.54) and most energetic (Eiso = 2.90 x 10^{53} ergs) GRBs, namely GRB 090618. We analyze its emission using several spectral models, with special attention to the thermal and power-law components. We determine the fundamental parameters of a canonical GRB within the context of the fireshell model. We find evidences of the existence of two different episodes in GRB 090618. The first episode lasts 50 s and is characterized by a spectrum consisting of thermal component, which evolves between kT = 54 keV and kT = 12 keV. The second episode, which lasts for \sim 100s, behaves as a canonical long GRB with a Lorentz gamma factor at transparency of g = 495, a temperature at transparency of 29.22 keV and with characteristic masses of the surrounding clouds of \sim 10^{22-24} g. We support the recently proposed two-component nature of GRB 090618 by using specific theoretical analysis and illustrate that the episode 1 cannot be considered to be either a GRB or a part of a GRB event, but it appears to be related to the progenitor of the collapsing bare core leading to the formation of the black hole which we call a proto-black hole.
19 pages, 18 figures. The abstract was reduced from the original one
References in corpus (25)
- An online repository of Swift/XRT light curves of GRBs
- The Hubble Diagram to Redshift >6 from 69 Gamma-Ray Bursts
- On the structure of relativistic collisionless shocks in electron-ion plasmas
- Detection of a Thermal Spectral Component in the Prompt Emission of GRB 100724B
- A Comprehensive Analysis of Fermi Gamma-Ray Burst Data. I. Spectral Components and Their Possible Physical Origins of LAT/GBM GRBs
- REM observations of GRB 060418 and GRB 060607A: the onset of the afterglow and the initial fireball Lorentz factor determination
- Towards Realistic Progenitors of Core-Collapse Supernovae
- Temporal Evolution Of Thermal Emission From Relativistically Expanding Plasma
- Quasi-blackbody component and radiative efficiency of the prompt emission of gamma-ray bursts
- A new method of determining the initial size and Lorentz factor of gamma-ray burst fireballs using a thermal emission component
- Prompt emission spectra from the photosphere of a GRB
- Looking Into the Fireball: ROTSE-III and Swift Observations of Early GRB Afterglows
- A general scheme for modeling gamma-ray burst prompt emission
- Precursors in Swift Gamma Ray Bursts with redshift
- Synchrotron emission in small scale magnetic field as possible explanation for prompt emission spectra of gamma-ray bursts
- Observational Limits on Inverse Compton Processes in GRBs
- Thermalization of a nonequilibrium electron-positron-photon plasma
- GRB060614: a "fake" short GRB from a merging binary system
- Evidence for a proto-black hole and a double astrophysical component in GRB 101023
- pair creation by vacuum polarization around electromagnetic black holes
- Radiative cooling in relativistic collisionless shocks. Can simulations and experiments probe relevant GRB physics?
- GRB 071227: an additional case of a disguised short burst
- Spectral lag of gamma-ray burst caused by the intrinsic spectral evolution and the curvature effect
- Detection of GRB 090618 with RT-2 Experiment Onboard the Coronas-Photon Satellite
- On the nature of GRB 050509b: a disguised short GRB
Cited by in corpus (37)
- The THESEUS space mission concept: science case, design and expected performances
- On the Induced Gravitational Collapse of a Neutron Star to a Black Hole by a Type Ib/c Supernova
- Hypercritical Accretion, Induced Gravitational Collapse, and Binary-Driven Hypernovae
- The ultra-long GRB 111209A - II. Prompt to afterglow and afterglow properties
- On the classification of GRBs and their occurrence rates
- Observatory science with eXTP
- On the induced gravitational collapse scenario of gamma-ray bursts associated with supernovae
- Angular Momentum Role in the Hypercritical Accretion of Binary-Driven Hypernovae
- Early X-ray Flares in GRBs
- GRB 090618: The First Example of a Neutron Star Gravitational Collapse to a Black Hole Induced by a Type Ib/c Supernova
- On Binary Driven Hypernovae and their nested late X-ray emission
- Clustering of gamma-ray burst types in the Fermi-GBM catalogue: indications of photosphere and synchrotron emissions during the prompt phase
- Photospheric Emission in Gamma-Ray Bursts
- GRB 090227B: the missing link between the genuine short and long GRBs
- Novel distance indicator for gamma-ray bursts associated with supernovae
- GRB 110709B in the Induced Gravitational Collapse paradigm
- GRB 140619B: a short GRB from a binary neutron star merger leading to black hole formation
- Analysis of GRB 080319B and GRB 050904 within the fireshell model: evidence for a broader spectral energy distribution
- AstroSat-CZTI detection of variable prompt emission polarization in GRB 171010A
- GRB 090510: a genuine short-GRB from a binary neutron star coalescing into a Kerr-Newman black hole
- Violation of synchrotron line of death by the highly polarized
- On the ultra-relativistic Prompt Emission (UPE), the Hard and Soft X-ray Flares, and the extended thermal emission (ETE) in GRB 151027A
- On the rate and on the gravitational wave emission of short and long GRBs
- The Transient High-Energy Sky and Early Universe Surveyor (THESEUS)
- GRB-SN Association within the Binary-Driven Hypernova Model
- Induced Gravitational Collapse, Binary-Driven Hypernovae, Long Gramma-ray Bursts and Their Connection with Short Gamma-ray Bursts
- Induced gravitational collapse at extreme cosmological distances: the case of GRB 090423
- A search for \textit{Fermi} bursts associated to supernovae and their frequency of occurrence
- Discovery of Smoothly Evolving Blackbodies in the Early Afterglow of GRB 090618 : Evidence for a Spine-Sheath Jet?
- GRB 081024B and GRB 140402A: two additional short GRBs from binary neutron star mergers
- On the universal late X-ray emission of binary-driven hypernovae and its possible collimation
- A Brief Review of Binary Driven Hypernova
- Induced Gravitational Collapse in the BATSE era: the case of GRB 970828
- Diffusive photospheres in gamma-ray bursts
- A common behavior in the late X-ray afterglow of energetic GRB-SN systems
- GAME: Grb and All-sky Monitor Experiment
- MeV, GeV and TeV neutrinos from binary-driven hypernovae