FINGERPRINTS OF GALACTIC LOOP I ON THE COSMIC MICROWAVE BACKGROUND
We investigate possible imprints of galactic foreground structures such as the "radio loops" in the derived maps of the cosmic microwave background. Surprisingly, there is evidence for these not only at radio frequencies through their synchrotron radiation, but also at microwave frequencie...
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| Veröffentlicht in: | Astrophysical journal. Letters 2014-07, Vol.789 (2), p.1-5 |
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| container_title | Astrophysical journal. Letters |
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| creator | Liu, Hao Mertsch, Philipp Sarkar, Subir |
| description | We investigate possible imprints of galactic foreground structures such as the "radio loops" in the derived maps of the cosmic microwave background. Surprisingly, there is evidence for these not only at radio frequencies through their synchrotron radiation, but also at microwave frequencies where emission by dust dominates. This suggests the mechanism is magnetic dipole radiation from dust grains enriched by metallic iron or ferrimagnetic molecules. This new foreground we have identified is present at high galactic latitudes, and potentially dominates over the expected B-mode polarization signal due to primordial gravitational waves from inflation. |
| doi_str_mv | 10.1088/2041-8205/789/2/L29 |
| format | Article |
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Surprisingly, there is evidence for these not only at radio frequencies through their synchrotron radiation, but also at microwave frequencies where emission by dust dominates. This suggests the mechanism is magnetic dipole radiation from dust grains enriched by metallic iron or ferrimagnetic molecules. This new foreground we have identified is present at high galactic latitudes, and potentially dominates over the expected B-mode polarization signal due to primordial gravitational waves from inflation.</description><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.1088/2041-8205/789/2/L29</identifier><language>eng</language><publisher>United States</publisher><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; BACKGROUND RADIATION ; COSMIC DUST ; Cosmic microwave background ; COSMOLOGY ; Dust ; Enrichment ; Fingerprints ; GRAVITATIONAL WAVES ; INFLATIONARY UNIVERSE ; IRON ; MAGNETIC DIPOLES ; PHOTON EMISSION ; POLARIZATION ; POTENTIALS ; RADIOWAVE RADIATION ; RELICT RADIATION ; SYNCHROTRON RADIATION</subject><ispartof>Astrophysical journal. 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Surprisingly, there is evidence for these not only at radio frequencies through their synchrotron radiation, but also at microwave frequencies where emission by dust dominates. This suggests the mechanism is magnetic dipole radiation from dust grains enriched by metallic iron or ferrimagnetic molecules. This new foreground we have identified is present at high galactic latitudes, and potentially dominates over the expected B-mode polarization signal due to primordial gravitational waves from inflation.</description><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>BACKGROUND RADIATION</subject><subject>COSMIC DUST</subject><subject>Cosmic microwave background</subject><subject>COSMOLOGY</subject><subject>Dust</subject><subject>Enrichment</subject><subject>Fingerprints</subject><subject>GRAVITATIONAL WAVES</subject><subject>INFLATIONARY UNIVERSE</subject><subject>IRON</subject><subject>MAGNETIC DIPOLES</subject><subject>PHOTON EMISSION</subject><subject>POLARIZATION</subject><subject>POTENTIALS</subject><subject>RADIOWAVE RADIATION</subject><subject>RELICT RADIATION</subject><subject>SYNCHROTRON RADIATION</subject><issn>2041-8205</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqNkE1Pg0AQhjdGE2v1F3jZxIsXZHcW9uNIESgR2YZSPZKWXWJNLerS_y-mjWcPk3fy5MlM8iJ0S8kDJVL6QALqSSChL6TywS9AnaHJiVJ2_reT8BJdOfdOCBBO5QTN0rzMkmpR5WW9xDrFWVREcZ3HuNB6gXOsS1zPExzr5fMIx6n0a_SS4FkUP2WVXpWP1-iiW--cvTnlFK3SpI7nXqGzPI4Kr4dADZ40ayKVYtJyShRQaqzpQIBQQgYdA-i4IZsQhA1kZznrArMJKcjW2I4ZBWyK7o53ezdsG9duB9u-tf1-b9uhAWA8FESM1v3R-vzuvw7WDc3H1rV2t1vvbX9wDeVcKRoSFf5HDX5rGn__AE1nYOU</recordid><startdate>20140710</startdate><enddate>20140710</enddate><creator>Liu, Hao</creator><creator>Mertsch, Philipp</creator><creator>Sarkar, Subir</creator><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20140710</creationdate><title>FINGERPRINTS OF GALACTIC LOOP I ON THE COSMIC MICROWAVE BACKGROUND</title><author>Liu, Hao ; Mertsch, Philipp ; Sarkar, Subir</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-o249t-8da089938e6109211dedf27279784f322f6d0b527e48fe63f4db5128cdef3d923</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>BACKGROUND RADIATION</topic><topic>COSMIC DUST</topic><topic>Cosmic microwave background</topic><topic>COSMOLOGY</topic><topic>Dust</topic><topic>Enrichment</topic><topic>Fingerprints</topic><topic>GRAVITATIONAL WAVES</topic><topic>INFLATIONARY UNIVERSE</topic><topic>IRON</topic><topic>MAGNETIC DIPOLES</topic><topic>PHOTON EMISSION</topic><topic>POLARIZATION</topic><topic>POTENTIALS</topic><topic>RADIOWAVE RADIATION</topic><topic>RELICT RADIATION</topic><topic>SYNCHROTRON RADIATION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Liu, Hao</creatorcontrib><creatorcontrib>Mertsch, Philipp</creatorcontrib><creatorcontrib>Sarkar, Subir</creatorcontrib><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Astrophysical journal. Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Liu, Hao</au><au>Mertsch, Philipp</au><au>Sarkar, Subir</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>FINGERPRINTS OF GALACTIC LOOP I ON THE COSMIC MICROWAVE BACKGROUND</atitle><jtitle>Astrophysical journal. Letters</jtitle><date>2014-07-10</date><risdate>2014</risdate><volume>789</volume><issue>2</issue><spage>1</spage><epage>5</epage><pages>1-5</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>We investigate possible imprints of galactic foreground structures such as the "radio loops" in the derived maps of the cosmic microwave background. Surprisingly, there is evidence for these not only at radio frequencies through their synchrotron radiation, but also at microwave frequencies where emission by dust dominates. This suggests the mechanism is magnetic dipole radiation from dust grains enriched by metallic iron or ferrimagnetic molecules. This new foreground we have identified is present at high galactic latitudes, and potentially dominates over the expected B-mode polarization signal due to primordial gravitational waves from inflation.</abstract><cop>United States</cop><doi>10.1088/2041-8205/789/2/L29</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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| source | IOP Publishing Free Content; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; IOPscience extra; Alma/SFX Local Collection |
| subjects | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BACKGROUND RADIATION COSMIC DUST Cosmic microwave background COSMOLOGY Dust Enrichment Fingerprints GRAVITATIONAL WAVES INFLATIONARY UNIVERSE IRON MAGNETIC DIPOLES PHOTON EMISSION POLARIZATION POTENTIALS RADIOWAVE RADIATION RELICT RADIATION SYNCHROTRON RADIATION |
| title | FINGERPRINTS OF GALACTIC LOOP I ON THE COSMIC MICROWAVE BACKGROUND |
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