English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Archeops is a balloon-borne experiment, mainly designed to measure the CosmicMicrowave Background (CMB) temperature anisotropies at high angular resolution(~ 12 arcminutes). By-products of the mission are shallow sensitivity maps overa large fraction of the sky (about 30 %) in the millimetre and submillimetrerange at 143, 217, 353 and 545 GHz. From these maps, we produce a catalog ofbright submillimetre point sources. We present in this paper the processing andanalysis of the Archeops point sources. Redundancy across detectors is the keyfactor allowing to sort out glitches from genuine point sources in the 20independent maps. We look at the properties of the most reliable point sources,totalling 304. Fluxes range from 1 to 10,000 Jy (at the frequencies covering143 to 545 GHz). All sources are either planets (2) or of galactic origin.Longitude range is from 75 to 198 degrees. Some of the sources are associatedwith well-known Lynds Nebulae and HII compact regions in the galactic plane. Alarge fraction of the sources have an IRAS counterpart. Except for Jupiter,Saturn, the Crab and Cas A, all sources show a dust-emission-like modifiedblackbody emission spectrum. Temperatures cover a range from 7 to 27 K. For thecoldest sources (T<10 K), a steep nu^beta emissivity law is found with asurprising beta ~ 3 to 4. An inverse relationship between T and beta isobserved. The number density of sources at 353 GHz with flux brighter than 100Jy is of the order of 1 per degree of Galactic longitude. These sources willprovide a strong check for the calibration of the Planck HFI focal planegeometry as a complement to planets. These very cold sources observed byArcheops should be prime targets for mapping observations by the Akari andHerschel space missions and ground--based observatories.

Submillimetre point sources from the Archeops experiment: Very Cold Clumps in the Galactic Plane