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Authordc.contributor.authorAnglada, Guillem 
Authordc.contributor.authorAmado, Pedro J. 
Authordc.contributor.authorOrtiz, Jose L. 
Authordc.contributor.authorBerdinas, Zaira M. 
Authordc.contributor.authorJenkins, James Stewart 
Cita de ítemdc.identifier.citationAstrophysical Journal Letters Vol 850 (1): L6es_ES
Abstractdc.description.abstractProxima Centauri, the star closest to our Sun, is known to host at least one terrestrial planet candidate in a temperate orbit. Here we report the Atacama Large Millimeter/submillimeter Array (ALMA) detection of the star at 1.3 mm wavelength and the discovery of a belt of dust orbiting around it at distances ranging between 1 and 4 au, approximately. Given the low luminosity of the Proxima Centauri star, we estimate a characteristic temperature of about 40 K for this dust, which might constitute the dust component of a small-scale analog to our solar system's Kuiper Belt. The estimated total mass, including dust and bodies up to 50 km in size, is of the order of 0.01 Earth masses, which is similar to that of the solar Kuiper Belt. Our data also show a hint of warmer dust closer to the star. We also find signs of two additional features that might be associated with the Proxima Centauri system that still require further observations to be confirmed: an outer extremely cold (about 10 K) belt around the star at about 30 au, with an orbital plane that is tilted about 45 degrees with respect to the plane of the sky; additionally, we marginally detect a compact 1.3 mm emission source at a projected distance of about 1.2 arcsec from the star, the nature of which is still unknown.es_ES
Patrocinadordc.description.sponsorshipMINECO (Spain) AYA-2014-56637-C2-1-P AYA2014-57369-C3-3-P AYA2015-63939-C2-1-P AYA2016-79425-C3-3P AYA2016-80889-P ESP2014-54032-R ESP2014-54362-P ESP2016-76076-R FEDER funds STFC ST/L004801 Fondecyt 1161218 CATA-Basal (CONICYT) PB06 ALMA-CONICYT FUNDes_ES
Publisherdc.publisherIOP Publishing Ltd.es_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Sourcedc.sourceAstrophysical Journal Letterses_ES
Keywordsdc.subjectCircumstellar matteres_ES
Keywordsdc.subjectPlanetary systemses_ES
Keywordsdc.subjectRadio continuum planetary systemses_ES
Keywordsdc.subjectStars individual (Proxima Centauri)es_ES
Títulodc.titleALMA discovery of dust belts around proxima centauries_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES

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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile