Atoms in Strong Magnetic Fields

Ruder, H.; Wunner, Günter; Herold, H.; Geyer, Florian

doi:10.1007/978-3-642-78820-8

Cited by 261 publications

(283 citation statements)

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“…Because of the enormous NS gravity, the outer layers of the NS atmosphere should be comprised of the lightest element present. If, in the absence of H, the NS has an He atmosphere, we still expect spectral features in the observed range if the magnetic field is ∼ G. In such a field the He atmos-12 3 # 10 phere is not completely ionized even at MK because of T ∼ 1 the large increase of the ionization potentials (Ruder et al 1994):…”

Section: Discussionmentioning

confidence: 91%

The X-Ray Spectrum of the Vela Pulsar Resolved with the [ITAL]Chandra X-Ray Observatory[/ITAL]

Pavlov

Zavlin

Sanwal

et al. 2001

The Astrophysical Journal

208

172

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We report the results of the spectral analysis of two observations of the Vela pulsar with the Chandra X-Ray Observatory. The spectrum of the pulsar does not show statistically significant spectral lines in the observed 0.25-8.0 keV band. Similar to middle-aged pulsars with detected thermal emission, the spectrum consists of two distinct components. The softer component can be modeled as a magnetic hydrogen atmosphere spectrum-for the pulsar magnetic field G and neutron star mass and radius km, we

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Section: Discussionmentioning

confidence: 91%

The X-Ray Spectrum of the Vela Pulsar Resolved with the [ITAL]Chandra X-Ray Observatory[/ITAL]

Pavlov

Zavlin

Sanwal

et al. 2001

The Astrophysical Journal

208

172

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“…The available nonmagnetic NS atmosphere models do not fit the observed spectrum, which is not surprising because the observed pulsations require a strong magnetic field. In recent years, there has been significant work on the structure and spectra of atoms in strong magnetic fields, mostly in fields below 10 13 G (see, e.g., Ruder et al 1994, Mori & Hailey 2002, and references therein). Based on these works, we can exclude some possibilities.…”

Section: Atomic Linesmentioning

confidence: 99%

Discovery of Absorption Features in the X-Ray Spectrum of an Isolated Neutron Star

Sanwal

Pavlov

Zavlin

et al. 2002

The Astrophysical Journal

246

286

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We observed 1E 1207.4Ϫ5209, a neutron star in the center of the supernova remnant PKS 1209Ϫ51/52, with the ACIS detector aboard the Chandra X-Ray Observatory and detected two absorption features in the source spectrum. The features are centered near 0.7 and 1.4 keV; their equivalent widths are about 0.1 keV. We discuss various possible interpretations of the absorption features and exclude some of them. A likely interpretation is that the features are associated with atomic transitions of once-ionized helium in the neutron star atmosphere with a strong magnetic field. The first clear detection of absorption features in the spectrum of an isolated neutron star provides an opportunity to measure the mass-to-radius ratio and to constrain the equation of state of the superdense matter.

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“…T he response of atoms to high magnetic fields has been of interest for many decades [1][2][3][4] . It has been suggested that magnetic flux densities up to 10 5 T (1 gigagauss) exist on the surface of white dwarf and cataclysmic variable stars [5][6][7] .…”

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confidence: 99%

“…It has been suggested that magnetic flux densities up to 10 5 T (1 gigagauss) exist on the surface of white dwarf and cataclysmic variable stars [5][6][7] . This inference is based on a complex process that involves a combination of modelling the pattern of flux around the surface and up through the atmosphere of the star, and a search for transitions that are stationary with magnetic field [2][3][4] . These models are then compared with astrophysical spectra.…”

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confidence: 99%

Si:P as a laboratory analogue for hydrogen on high magnetic field white dwarf stars

Murdin

Pang

et al. 2013

Nat Commun

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Laboratory spectroscopy of atomic hydrogen in a magnetic flux density of 10 5 T (1 gigagauss), the maximum observed on high-field magnetic white dwarfs, is impossible because practically available fields are about a thousand times less. In this regime, the cyclotron and binding energies become equal. Here we demonstrate Lyman series spectra for phosphorus impurities in silicon up to the equivalent field, which is scaled to 32.8 T by the effective mass and dielectric constant. The spectra reproduce the high-field theory for free hydrogen, with quadratic Zeeman splitting and strong mixing of spherical harmonics. They show the way for experiments on He and H 2 analogues, and for investigation of He 2 , a bound molecule predicted under extreme field conditions.

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Atoms in Strong Magnetic Fields

Cited by 261 publications

References 0 publications

The X-Ray Spectrum of the Vela Pulsar Resolved with the [ITAL]Chandra X-Ray Observatory[/ITAL]

The X-Ray Spectrum of the Vela Pulsar Resolved with the [ITAL]Chandra X-Ray Observatory[/ITAL]

Discovery of Absorption Features in the X-Ray Spectrum of an Isolated Neutron Star

Si:P as a laboratory analogue for hydrogen on high magnetic field white dwarf stars

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