Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/30267
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Torres, Diego F. | en_US |
dc.contributor.author | Ji, Long | en_US |
dc.contributor.author | Li, Jian | en_US |
dc.contributor.author | PAPITTO, ALESSANDRO | en_US |
dc.contributor.author | Rea, Nanda | en_US |
dc.contributor.author | de Oña Wilhelmi, Emma | en_US |
dc.contributor.author | Zhang, Shu | en_US |
dc.date.accessioned | 2021-02-10T10:18:29Z | - |
dc.date.available | 2021-02-10T10:18:29Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/30267 | - |
dc.description.abstract | Considering about seven years of Fermi-Large Area Telescope (LAT) data, we present a systematic search for variability that is possibly related to transitions between states in redbacks and black widow systems. The transitions are characterized by sudden and significant changes in the gamma-ray flux that persist on a timescale that is much larger than the orbital period. This phenomenology was already detected in the case of two redback systems, PSR J1023+0038 and PSR J1227-4853, which we present here. We show the existence of only one transition for each of these systems over the past seven years. We determine their spectra, establishing high-energy cutoffs at a few GeV for the high gamma-ray state of PSR J1023+0038, and for both states of PSR J1227-4853. The surveying capability of the Fermi-LAT allows further study of whether similar phenomenology has occurred in other sources. Although we have not found any evidence of a state transition for most of the studied pulsars, we note two black-widow systems, PSR J2234+0944 and PSR J1446-4701, whose apparent variabilities are reminiscent of the transitions in PSR J1023+0038 and PSR J1227-4853. For the other systems, we set limits on potential transitions in their measured gamma-ray light curves. | en_US |
dc.language.iso | eng | en_US |
dc.title | A Search for Transitions between States in Redbacks and Black Widows Using Seven Years of Fermi-LAT Observations | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/836/1/68 | en_US |
dc.identifier.scopus | 2-s2.0-85014382403 | en_US |
dc.identifier.isi | 000397304500020 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/836/1/68 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 836 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 68 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2017ApJ...836...68T | en_US |
dc.relation.fund | H2020 | en_US |
dc.relation.project | TMSP (Mass accretion and ejection in transitional millisecond pulsars) | 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. Roma | - |
crisitem.author.orcid | 0000-0001-6289-7413 | - |
crisitem.project.grantno | 660657 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Torres_2017_ApJ_836_68.pdf | Pdf editoriale | 1.29 MB | Adobe PDF | View/Open |
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