Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28236
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Brumback, McKinley C. | en_US |
dc.contributor.author | Hickox, Ryan C. | en_US |
dc.contributor.author | BACHETTI, Matteo | en_US |
dc.contributor.author | Ballhausen, Ralf | en_US |
dc.contributor.author | Fürst, Felix S. | en_US |
dc.contributor.author | Pike, Sean | en_US |
dc.contributor.author | Pottschmidt, Katja | en_US |
dc.contributor.author | Tomsick, John A. | en_US |
dc.contributor.author | Wilms, Jörn | en_US |
dc.date.accessioned | 2020-11-09T16:03:04Z | - |
dc.date.available | 2020-11-09T16:03:04Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 2041-8205 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28236 | - |
dc.description.abstract | Two Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the luminous X-ray pulsar LMC X-4 in 2015 October and November captured several bright accretion flares from this source, which has a long history of stable pulse and superorbital behavior. We present a timing analysis of these data in which we detect a rapid pulse “turn-on” in association with the accretion flares, during which the source reaches super-Eddington luminosities. Pulsations, which are normally seen from this source, are found to only occur for approximately one hour before and during the bright flares. Beyond one hour before and after the flares, we find pulsations to be weak or nonexistent, with fractional rms amplitudes of less than 0.05. At the onset of the flare, the pulse profiles exhibit a phase shift of 0.25 cycles that could be associated with a change in the emission geometry. This increase in pulse strength occurring well before the flare cannot be explained by the propeller effect, and potentially offers a connection between the magnetic properties of pulsars that accrete close to their Eddington limits and ultra-luminous X-ray pulsars. | en_US |
dc.language.iso | eng | en_US |
dc.title | Discovery of Pulsation Dropout and Turn-on during the High State of the Accreting X-Ray Pulsar LMC X-4 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/2041-8213/aacd13 | en_US |
dc.identifier.scopus | 2-s2.0-85049989667 | en_US |
dc.identifier.isi | 000436808400003 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/2041-8213/aacd13 | en_US |
dc.identifier.url | https://ui.adsabs.harvard.edu/link_gateway/2018ApJ...861L...7B/EPRINT_PDF | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 861 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | L7 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | DEU | en_US |
dc.contributor.country | ESP | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL LETTERS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018ApJ...861L...7B | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_10 High energy and particle astronomy – X-rays, cosmic rays, gamma rays, neutrinos | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Cagliari | - |
crisitem.author.orcid | 0000-0002-4576-9337 | - |
crisitem.journal.journalissn | 2041-8205 | - |
crisitem.journal.ance | E196528 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Brumback_2018_ApJL_861_L7.pdf | Pdf editoriale | 654.47 kB | Adobe PDF | View/Open |
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