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Multiwavelength Evidence for a New Flare-mode Transitional Millisecond Pulsar
| dc.abstract.en | We report the discovery of a new low-mass X-ray binary near the center of the unassociated Fermi GeV γ-ray source 4FGL J0540.0-7552. The source shows the persistent presence of an optical accretion disk and exhibits extreme X-ray and optical variability. It also has an X-ray spectrum well-fit by a hard power law with Γ = 1.8 and a high ratio of X-ray to γ-ray flux. Together, these properties are consistent with the classification of the binary as a transitional millisecond pulsar (tMSP) in the subluminous disk state. Uniquely among the candidate tMSPs, 4FGL J0540.0-7552 shows consistent optical, X-ray, and γ-ray evidence for having undergone a state change, becoming substantially brighter in the optical and X-rays and fainter in GeV γ-rays sometime in mid-2013. In its current subluminous disk state, and like one other candidate tMSP in the Galactic field, 4FGL J0540.0-7552 appears to always be in an X-ray flare mode, indicating that this could be common phenomenology for tMSPs. |
| dc.affiliation | Uniwersytet Warszawski |
| dc.contributor.author | Strader, Jay |
| dc.contributor.author | Swihart, Samuel J. |
| dc.contributor.author | Urquhart, Ryan |
| dc.contributor.author | Chomiuk, Laura |
| dc.contributor.author | Aydi, Elias |
| dc.contributor.author | Bahramian, Arash |
| dc.contributor.author | Kawash, Adam |
| dc.contributor.author | Sokolovsky, Kirill V. |
| dc.contributor.author | Tremou, Evangelia |
| dc.contributor.author | Udalski, Andrzej |
| dc.date.accessioned | 2024-01-25T13:17:44Z |
| dc.date.available | 2024-01-25T13:17:44Z |
| dc.date.copyright | 2021-06-14 |
| dc.date.issued | 2021 |
| dc.description.accesstime | BEFORE_PUBLICATION |
| dc.description.finance | Publikacja bezkosztowa |
| dc.description.number | 2 |
| dc.description.version | ORIGINAL_AUTHOR |
| dc.description.volume | 917 |
| dc.identifier.doi | 10.3847/1538-4357/AC0B47 |
| dc.identifier.issn | 0004-637X |
| dc.identifier.uri | https://repozytorium.uw.edu.pl//handle/item/113152 |
| dc.identifier.weblink | http://adsabs.harvard.edu/abs/2021ApJ...917...69S |
| dc.language | eng |
| dc.pbn.affiliation | astronomy |
| dc.relation.ispartof | Astrophysical Journal |
| dc.relation.pages | 69 |
| dc.rights | Other |
| dc.sciencecloud | nosend |
| dc.title | Multiwavelength Evidence for a New Flare-mode Transitional Millisecond Pulsar |
| dc.type | JournalArticle |
| dspace.entity.type | Publication |