Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29421
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Capellupo, Daniel M. | en_US |
dc.contributor.author | Haggard, Daryl | en_US |
dc.contributor.author | Choux, Nicolas | en_US |
dc.contributor.author | Baganoff, Fred | en_US |
dc.contributor.author | Bower, Geoffrey C. | en_US |
dc.contributor.author | Cotton, Bill | en_US |
dc.contributor.author | Degenaar, Nathalie | en_US |
dc.contributor.author | Dexter, Jason | en_US |
dc.contributor.author | Falcke, Heino | en_US |
dc.contributor.author | Fragile, P. Chris | en_US |
dc.contributor.author | Heinke, Craig O. | en_US |
dc.contributor.author | Law, Casey J. | en_US |
dc.contributor.author | Markoff, Sera | en_US |
dc.contributor.author | Neilsen, Joey | en_US |
dc.contributor.author | PONTI, GABRIELE | en_US |
dc.contributor.author | Rea, Nanda | en_US |
dc.contributor.author | Yusef-Zadeh, Farhad | en_US |
dc.date.accessioned | 2021-01-04T10:56:26Z | - |
dc.date.available | 2021-01-04T10:56:26Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29421 | - |
dc.description.abstract | Monitoring of Sagittarius A* from X-ray to radio wavelengths has revealed structured variability—including X-ray flares—but it is challenging to establish correlations between them. Most studies have focused on variability in the X-ray and infrared, where variations are often simultaneous, and because long time series at submillimeter and radio wavelengths are limited. Previous work on submillimeter and radio variability hints at a lag between X-ray flares and their candidate submillimeter or radio counterparts, with the long wavelength data lagging the X-ray. However, there is only one published time lag between an X-ray flare and a possible radio counterpart. Here we report nine contemporaneous X-ray and radio observations of Sgr A*. We detect significant radio variability peaking ≳ 176 minutes after the brightest X-ray flare ever detected from Sgr A*. We also report other potentially associated X-ray and radio variability, with the radio peaks appearing ≲ 80 minutes after these weaker X-ray flares. Taken at face value, these results suggest that stronger X-ray flares lead to longer time lags in the radio. However, we also test the possibility that the variability at X-ray and radio wavelengths is not temporally correlated. We cross-correlate data from mismatched X-ray and radio epochs and obtain comparable correlations to the matched data. Hence, we find no overall statistical evidence that X-ray flares and radio variability are correlated, underscoring a need for more simultaneous, long duration X-ray-radio monitoring of Sgr A*. | en_US |
dc.language.iso | eng | en_US |
dc.title | Simultaneous Monitoring of X-Ray and Radio Variability in Sagittarius A* | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/aa7da6 | en_US |
dc.identifier.scopus | 2-s2.0-85029233312 | en_US |
dc.identifier.isi | 000407329800014 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 845 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 35 | en_US |
dc.type.referee | REF_1 | 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...845...35C | 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.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.orcid | 0000-0003-0293-3608 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1707.01937.pdf | postprint | 1.04 MB | Adobe PDF | View/Open |
Capellupo_2017_ApJ_845_35.pdf | Pdf editoriale | 3.08 MB | Adobe PDF | View/Open |
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