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Magnetars: a short review and some sparse considerations

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arxiv 1803.05716 v1 pith:4HR3HT74 submitted 2018-03-15 astro-ph.HE

P. Esposito , N. Rea , G. L. Israel This is my paper · ORCID
classification astro-ph.HE
keywords magnetarsburstsisolatedneutronsomesourcesstarsthey
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We currently know about 30 magnetars: seemingly isolated neutron stars whose properties can be (in part) comprehended only acknowledging that they are endowed with magnetic fields of complex morphology and exceptional intensity-at least in some components of the field structure. Although magnetars represent only a small percentage of the known isolated neutron stars, there are almost certainly many more of them, since most magnetars were discovered in transitory phases called outbursts, during which they are particularly noticeable. In outburst, in fact, a magnetar can be brighter in X-rays by orders of magnitude and usually emit powerful bursts of hard-X/soft-gamma-ray photons that can be detected almost everywhere in the Galaxy with all-sky monitors such as those on board the Fermi satellite or the Neil Gehrels Swift Observatory. Magnetars command great attention because the large progress that has been made in their understanding is proving fundamental to fathom the whole population of isolated neutron stars, and because, due to their extreme properties, they are relevant for a vast range of different astrophysical topics, from the study of gamma-ray bursts and superluminous supernovae, to ultraluminous X-ray sources, fast radio bursts, and even to sources of gravitational waves. Several excellent reviews with different focuses were published on magnetars in the last few years: among others, Israel and Dall'Osso (2011); Rea and Esposito (2011); Turolla and Esposito (2013); Mereghetti et al. (2015); Turolla et al. (2015); Kaspi and Beloborodov (2017). Here, we quickly recall the history of these sources and travel through the main observational facts, trying to touch some recent and sometimes little-discussed ramifications of magnetars.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Upgraded antennas for pulsar observations in the Argentine Institute of Radio astronomy

    astro-ph.IM 2019-08 conditional novelty 6.0 of 10

    IAR's upgraded 30 m antennas achieve sub-microsecond pulsar timing on J0437-4715 and detected the 2019 Vela glitch, establishing a new southern-hemisphere daily pulsar monitoring capability.

  2. Gamma Rays from ALP-Photon Conversion and Inverse Compton Reprocessing in Neutron Star Magnetospheres

    astro-ph.HE 2026-08 conditional novelty 5.0 of 10

    ALP-to-photon conversion near four pulsars produces mostly sub-MeV emission: Fermi-LAT is insensitive to the channel, COMPTEL data already exclude new parameter space at high ALP mass, and COSI could probe much more.

  3. Multiwavelength study of non-thermal emission in the Swift J1834.9-0846/W41 region

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    Modeling favors a lepto-hadronic supernova remnant for the extended TeV emission from HESS J1834-087 plus a leptonic magnetar wind nebula for the central point-like source, with an implied magnetar birth spin period b...

  4. On Ultra-long Period (53.8 min) Pulsar ASKAP J1935+2148: Coherent Radio Emission Triggered by Local Superstrong Magnetic Reconnection

    astro-ph.HE 2025-08 conditional novelty 5.0 of 10

    Ultra-long period pulsars may be Crab-like pulsars spun down by particle winds, with their radio emission powered by local magnetic reconnection instead of rotation.

  5. Non-thermal emission from the vicinity of the magnetar CXOU J171405.7-381031

    astro-ph.HE 2026-07 conditional novelty 4.0 of 10

    Both leptonic and lepto-hadronic models fit the CTB 37B gamma-ray spectrum; neutral-pion decay matches above ~10 TeV but needs ~10^51 erg in protons unless the remnant hits dense gas.

  6. Search for transient gamma-ray emission from magnetar flares using Fermi-LAT

    astro-ph.HE 2024-12 conditional novelty 4.0 of 10

    A Fermi-LAT search around 15 magnetar flares yields mostly null results, with one 4.4-sigma candidate from 1E 1048.1-5937 that may be galactic diffuse contamination.

  7. Rapid Response Triggering for Radio Transients with the SKA Observatory

    astro-ph.IM 2026-07 accept novelty 3.0 of 10

    SKA-Low and SKA-Mid should implement automated rapid-response triggering on external and internal alerts to enable early radio observations of diverse transients.

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