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The First Ultraviolet Detection of the Large Magellanic Cloud Pulsar PSR B0540–69 and Its Multi-wavelength Properties

dc.contributor.authorMIGNANI, R.P.
dc.contributor.authorSHEARER, A.
dc.contributor.authorDE LUCA, A.
dc.contributor.authorMARSHALL, F.E.
hal.structure.identifierLaboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
dc.contributor.authorGUILLEMOT, L.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorSMITH, D.A.
dc.contributor.authorRUDAK, B.
dc.contributor.authorZAMPIERI, L.
dc.contributor.authorBARBIERI, C.
dc.contributor.authorNALETTO, G.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorGOUIFFES, C.
dc.contributor.authorKANBACH, G.
dc.date.issued2019
dc.description.abstractEnWe observed the young (~1700 yr) pulsar PSR B0540−69 in the ultraviolet for the first time with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope. Imaging observations with the NUV-MAMA and ultraviolet FUV-MAMA detectors in TIME-TAG mode allowed us to clearly detect the pulsar in two bands around 2350 and 1590 Å, with magnitudes m NUV = 21.45 ± 0.02 and m FUV = 21.83 ± 0.10. We also detected the pulsar wind nebula in the NUV-MAMA image, with a morphology similar to that observed in the optical and near-infrared (IR). The extinction-corrected NUV and FUV pulsar fluxes are compatible with a very steep power-law spectrum with spectral index α UV ~ 3, and incompatible with a Rayleigh–Jeans spectrum, indicating a non-thermal origin of the emission. The comparison with the optical/near-IR power-law spectrum (spectral index α O,nIR ~ 0.7), indicates an abrupt turnover at wavelengths below 2500 Å, not yet observed in other pulsars. We detected pulsations in both the NUV and FUV data at the 50 ms pulsar period. In both cases, the folded light curve features a broad pulse with two peaks closely spaced in phase, as observed in the optical and X-ray light curves. The NUV/FUV peaks are also aligned in phase with those observed in the radio (1.4 GHz), optical, X-ray, and γ-ray light curves, as in the Crab pulsar, implying a similar beaming geometry across all wavelengths. PSR B0540−69 is now the fifth isolated pulsar, together with Crab, Vela, PSR B0656+14, and the radio-quiet Geminga, detected in the optical, UV, near-IR, X-rays, and γ-rays, and seen to pulsate in at least four of these energy bands.
dc.language.isoen
dc.subject.enpulsars: general
dc.subject.enpulsars: individual
dc.subject.en(PSR B0540–69)
dc.title.enThe First Ultraviolet Detection of the Large Magellanic Cloud Pulsar PSR B0540–69 and Its Multi-wavelength Properties
dc.typeArticle de revue
dc.identifier.doi10.3847/1538-4357/aafb04
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.subject.halPlanète et Univers [physics]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv1809.10805
bordeaux.journalAstrophys.J.
bordeaux.page246
bordeaux.volume871
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-01909181
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01909181v1
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