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19 April 2024 |
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ALMA Band 3 polarimetric follow-up of a complete sample of faint PACO sources | | Vincenzo Galluzzi
; Giuseppe Puglisi
; Sandra Burkutean
; Elisabetta Liuzzo
; Matteo Bonato
; Marcella Massardi
; Rosita Paladino
; Loretta Gregorini
; Roberto Ricci
; Tiziana Trombetti
; Luigi Toffolatti
; Carlo Burigana
; Anna Bonaldi
; Laura Bonavera
; Viviana Casasola
; Gianfranco De Zotti
; Ronald David Ekers
; Sperello di Serego Alighieri
; Marcos López-Caniego
; Marco Tucci
; | | Date: |
30 Jun 2019 | | Abstract: | We present Atacama Large Millimeter/submillimiter Array (ALMA) high
sensitivity ($sigma_P simeq 0.4,$mJy) polarimetric observations at
$97.5,$GHz (Band 3) of a complete sample of $32$ extragalactic radio sources
drawn from the faint Planck-ATCA Co-eval Observations (PACO) sample
($b<-75^circ$, compact sources brighter than $200,$mJy at $20,$GHz). We
achieved a detection rate of $~97\%$ at $3,sigma$ (only $1$ non-detection).
We complement these observations with new Australia Telescope Compact Array
(ATCA) data between $2.1$ and $35,$GHz obtained within a few months and with
data published in earlier papers from our collaboration. Adding the co-eval
GaLactic and Extragalactic All-sky Murchison widefield array (GLEAM) survey
detections between $70,$ and $230,$MHz for our sources, we present spectra
over more than $3$ decades in frequency in total intensity and over about $1.7$
decades in polarization. The spectra of our sources are smooth over the whole
frequency range, with no sign of dust emission from the host galaxy at mm
wavelengths nor of a sharp high frequency decline due, for example, to electron
ageing. We do however find indications of multiple emitting components and
present a classification based on the number of detected components. We analyze
the polarization fraction behaviour and distributions up to $97,$GHz for
different source classes. Source counts in polarization are presented at
$95,$GHz. | | Source: | arXiv, 1907.0299 | | Services: | Forum | Review | PDF | Favorites | |
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