Modified equipartition calculation for supernova remnants
arXiv:1111.5465 · doi:10.1088/0004-637X/746/1/79
Abstract
Determination of the magnetic field strength in the interstellar medium is one of the most complex tasks of contemporary astrophysics. We can only estimate the order of magnitude of the magnetic field strength by using a few very limited methods. Besides Zeeman effect and Faraday rotation, the equipartition or the minimum-energy calculation is a widespread method for estimating magnetic field strength and energy contained in the magnetic field and cosmic ray particles by using only the radio synchrotron emission. Despite of its approximate character, it remains a useful tool, especially when there is no other data about the magnetic field in a source. In this paper we give a modified calculation which we think is more appropriate for estimating magnetic field strengths and energetics in supernova remnants (SNRs). Finally, we present calculated estimates of the magnetic field strengths for all Galactic SNRs for which the necessary observational data are available. The web application for calculation of the magnetic field strength of SNRs is available at http://poincare.matf.bg.ac.rs/~arbo/eqp/.
19 pages, 4 figures, 1 table, accepted for publication in ApJ; for associated web application, see http://poincare.matf.bg.ac.rs/~arbo/eqp/
References in corpus (7)
- Revised equipartition & minimum energy formula for magnetic field strength estimates from radio synchrotron observations
- Detection of a Hot Gaseous Halo Around the Giant Spiral Galaxy NGC 1961
- Magnetic fields in supernova remnants and pulsar-wind nebulae
- Expansion Velocity of Ejecta in Tycho's Supernova Remnant Measured by Doppler Broadened X-ray Line Emission
- Expansion of the Youngest Galactic Supernova Remnant G1.9+0.3
- Cosmic Magnetic Fields: Observations and Prospects
- The orthogonal fitting procedure for determination of the empirical Σ - D relations for supernova remnants: application to starburst galaxy M82
Cited by in corpus (39)
- Magnetic Fields in Spiral Galaxies
- Radio emission from Supernova Remnants
- Statistical Analysis of Supernova Remnants in the Large Magellanic Cloud
- The radio surface brightness to diameter relation for galactic supernova remnants: sample selection and robust analysis with various fitting offsets
- Spectral and morphological analysis of the remnant of Supernova 1987A with ALMA & ATCA
- On the radio spectra of supernova remnants
- Relative distribution of cosmic rays and magnetic fields
- Radio Evolution of Supernova Remnants Including Non-linear Particle Acceleration: Insights from Hydrodynamic Simulations
- An observational test for correlations between cosmic rays and magnetic fields
- Constraints on cosmic-ray efficiency in the supernova remnant RCW 86 using multi-wavelength observations
- Detailed spectral and morphological analysis of the shell type SNR RCW 86
- The ASKAP-EMU Early Science Project:Radio Continuum Survey of the Small Magellanic Cloud
- H.E.S.S. reveals a lack of TeV emission from the supernova remnant Puppis A
- Multi-Frequency Study of Supernova Remnants in the Large Magellanic Cloud. The case of LMC SNR J0530-7007
- Multifrequency study of SNR J0533-7202, a new supernova remnant in the LMC
- Multi-frequency study of a new Fe-rich supernova remnant in the Large Magellanic Cloud, MCSNR J0508-6902
- Radio-continuum study of Large Magellanic Cloud Supernova Remnant J0509-6731
- LOFAR 150-MHz observations of SS 433 and W 50
- Modeling SNR G1.9+0.3 as a Supernova Inside a Planetary Nebula
- Detection of Linear Polarization in the Radio Remnant of Supernova 1987A
- Particle acceleration and magnetic field amplification in massive young stellar object jets
- Modified equipartition calculation for supernova remnants. Cases α=0.5 and α=1
- On the foundation of equipartition in supernova remnants
- HFPK 334: An unusual Supernova Remnant in the Small Magellanic Cloud
- A new look at the origin of the 6.67\,hr period X-ray pulsar 1E~161348-5055
- Hydrodynamical and radio evolution of young supernova remnant G1.9+0.3 based on the model of diffusive shock acceleration
- Radio Emission from Interstellar Shocks: Young Type Ia Supernova Remnants and the Case of N 103B in the Large Magellanic Cloud
- Radio confirmation of Galactic supernova remnant G308.3-1.4
- Optical discovery and multiwavelength investigation of supernova remnant MCSNR J0512-6707 in the Large Magellanic Cloud
- ATCA Study of Small Magellanic Cloud Supernova Remnant 1E 0102.2-7219
- Magnetic fields and cosmic rays in M31. II. Strength and distribution of the magnetic field components
- A new look at the integrated radio/microwave continuum spectrum of Galactic supernova remnant IC443
- Probing magneto-ionic microstructure towards the Vela pulsar using a prototype SKA-Low station
- Non-Thermal Radio and Gamma-Ray Emission from a Supernova Remnant by the Blast Wave Breaking Out of the Circumstellar Matter
- Bayesian approach to equipartition estimation of magnetic field strength
- Murchison Widefield Array and XMM-Newton observations of the Galactic supernova remnant G5.9+3.1
- Theoretical - Relations for Shell-Type Galactic Supernova Remnants
- On the Determination of the Evolutionary Status of Supernova Remnants from Radio Observation Data
- Revisiting the Equipartition Assumption in Star-forming Galaxies