Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/32115
DC Field | Value | Language |
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dc.contributor.author | Pike, Sean N. | en_US |
dc.contributor.author | Negoro, Hitoshi | en_US |
dc.contributor.author | Tomsick, John A. | en_US |
dc.contributor.author | BACHETTI, Matteo | en_US |
dc.contributor.author | Brumback, McKinley | en_US |
dc.contributor.author | Connors, Riley M.T. | en_US |
dc.contributor.author | García, Javier A. | en_US |
dc.contributor.author | Grefenstette, Brian | en_US |
dc.contributor.author | Hare, Jeremy | en_US |
dc.contributor.author | Harrison, Fiona A. | en_US |
dc.contributor.author | Jaodand, Amruta | en_US |
dc.contributor.author | Ludlam, R. M. | en_US |
dc.contributor.author | MASTROSERIO, Guglielmo | en_US |
dc.contributor.author | Mihara, Tatehiro | en_US |
dc.contributor.author | Shidatsu, Megumi | en_US |
dc.contributor.author | Sugizaki, Mutsumi | en_US |
dc.contributor.author | Takagi, Ryohei | en_US |
dc.date.accessioned | 2022-05-30T14:57:24Z | - |
dc.date.available | 2022-05-30T14:57:24Z | - |
dc.date.issued | 2022 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32115 | - |
dc.description.abstract | We present the results of Monitor of All-sky X-ray Image (MAXI) monitoring and two Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the recently discovered faint X-ray transient MAXI J1848015. Analysis of the MAXI light curve shows that the source underwent a rapid flux increase beginning on 2020 December 20, followed by a rapid decrease in flux after only ∼5 days. NuSTAR observations reveal that the source transitioned from a bright soft state with unabsorbed, bolometric (0.1-100 keV) flux F = 6.9 ± 0.1 × 10-10 erg cm-2 s-1, to a low hard state with flux F = 2.85 ± 0.04 × 10-10 erg cm-2 s-1. Given a distance of 3.3 kpc, inferred via association of the source with the GLIMPSE-C01 cluster, these fluxes correspond to an Eddington fraction of the order of 10-3 for an accreting neutron star (NS) of mass M = 1.4M ⊙, or even lower for a more massive accretor. However, the source spectra exhibit strong relativistic reflection features, indicating the presence of an accretion disk that extends close to the accretor, for which we measure a high spin, a = 0.967 ± 0.013. In addition to a change in flux and spectral shape, we find evidence for other changes between the soft and hard states, including moderate disk truncation with the inner disk radius increasing from R in ≈ 3 R g to R in ≈ 8 R g, narrow Fe emission whose centroid decreases from 6.8 ± 0.1 keV to 6.3 ± 0.1 keV, and an increase in low-frequency (10-3-10-1 Hz) variability. Due to the high spin, we conclude that the source is likely to be a black hole rather than an NS, and we discuss physical interpretations of the low apparent luminosity as well as the narrow Fe emission. | en_US |
dc.language.iso | eng | en_US |
dc.title | MAXI and NuSTAR Observations of the Faint X-Ray Transient MAXI J1848-015 in the GLIMPSE-C01 Cluster | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/ac5258 | en_US |
dc.identifier.scopus | 2-s2.0-85126672845 | en_US |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85126672845 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/ac5258 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 927 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 190 | 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 | JPN | 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.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 | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Pike et al. - 2022 - MAXI and NuSTAR Observations of the Faint X-Ray Tr.pdf | Pdf editoriale | 1.97 MB | Adobe PDF | View/Open |
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