Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/34605
DC Field | Value | Language |
---|---|---|
dc.contributor.author | BRACCO, Andrea | en_US |
dc.contributor.author | PADOVANI, Marco | en_US |
dc.contributor.author | Juan D. Soler | en_US |
dc.date.accessioned | 2024-01-24T14:36:27Z | - |
dc.date.available | 2024-01-24T14:36:27Z | - |
dc.date.issued | 2023 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/34605 | - |
dc.description.abstract | Large-scale synchrotron loops are recognized as the main source of diffuse radio-continuum emission in the Galaxy at intermediate and high Galactic latitudes. Their origin, however, remains rather unexplained. Using a combination of multi-frequency data in the radio band of total and polarized intensities, for the first time in this letter, we associate one arc -- hereafter, the Orion-Taurus ridge -- with the wall of the most prominent stellar-feedback blown shell in the Solar neighborhood, namely the Orion-Eridanus superbubble. We traced the Orion-Taurus ridge using 3D maps of interstellar dust extinction and column-density maps of molecular gas, $N_{\rm H_2}$. We found the Orion-Taurus ridge at a distance of 400\,pc, with a plane-of-the-sky extent of $180$\,pc. Its median $N_{\rm H_2}$ value is $(1.4^{+2.6}_{-0.6})\times 10^{21}$ cm$^{-2}$. Thanks to the broadband observations below 100 MHz of the Long Wavelength Array, we also computed the low-frequency spectral-index map of synchrotron emissivity, $\beta$, in the Orion-Taurus ridge. We found a flat distribution of $\beta$ with a median value of $-2.24^{+0.03}_{-0.02}$ that we interpreted in terms of depletion of low-energy ($<$ GeV) cosmic-ray electrons in recent supernova remnants ($10^5$ - $10^6$ yrs). Our results are consistent with plane-of-the-sky magnetic-field strengths in the Orion-Taurus ridge larger than a few tens of $\mu$G ($> 30 - 40 \,\mu$G). We report the first detection of diffuse synchrotron emission from cold-neutral, partly molecular, gas in the surroundings of the Orion-Eridanus superbubble. This observation opens a new perspective to study the multiphase and magnetized interstellar medium with the advent of future high-sensitivity radio facilities, such as the C-Band All-Sky Survey and the Square Kilometre Array. | en_US |
dc.language.iso | eng | en_US |
dc.title | The Orion-Taurus ridge: a synchrotron radio loop at the edge of the Orion-Eridanus superbubble | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/202347283 | en_US |
dc.identifier.scopus | 2-s2.0-85172362922 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2023/09/aa47283-23/aa47283-23.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 677 | en_US |
dc.relation.firstpage | L11 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
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. Arcetri | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0003-0932-3140 | - |
crisitem.author.orcid | 0000-0003-2303-0096 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
aa47283-23-1.pdf | PDF editoriale | 1.79 MB | Adobe PDF | View/Open |
2308.16663-min.pdf | postprint | 752.37 kB | Adobe PDF | View/Open |
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