AKARI/IRC 18 μm survey of warm debris disks

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dc.contributor.author Fujiwara, Hideaki
dc.contributor.author Ishihara, Daisuke
dc.contributor.author Onaka, Takashi
dc.contributor.author Takita, Satoshi
dc.contributor.author Kataza, Hirokazu Zu
dc.contributor.author Yamashita, Takuya
dc.contributor.author Fukagawa, Misato
dc.contributor.author Ootsubo, Takafumi
dc.contributor.author Hirao, Takanori
dc.contributor.author Enya, Keigo
dc.contributor.author Marshall, Jonathan P.
dc.contributor.author White, Glenn J.
dc.contributor.author Nakagawa, Takao
dc.contributor.author Murakami, Hiroshi
dc.contributor.other UAM. Departamento de Física Teórica es_ES
dc.date.accessioned 2014-10-06T12:47:38Z
dc.date.available 2014-10-06T12:47:38Z
dc.date.issued 2013-01-31
dc.identifier.citation Astronomy and Astrophysics 550 (2013): A45 en_US
dc.identifier.issn 0004-6361 (print) es_ES
dc.identifier.issn 1432-0746 (online) es_ES
dc.identifier.uri http://hdl.handle.net/10486/662075
dc.description Astronomy and Astrophysics 550 (2013): A45 reproduced with permission from Astronomy & Astrophysics en_US
dc.description.abstract Little is known about the properties of the warm (Tdust≥150 K) debris disk material located close to the central star, which has a more direct link to the formation of terrestrial planets than does the low-temperature debris dust that has been detected to date. Aims. To discover new warm debris disk candidates that show large 18 μm excess and estimate the fraction of stars with excess based on the AKARI/IRC Mid-Infrared All-Sky Survey data. Methods. We searched for point sources detected in the AKARI/IRC All-Sky Survey, which show a positional match with A-M dwarf stars in the Tycho-2 Spectral Type Catalogue and exhibit excess emission at 18 μm compared to what is expected from the KS magnitude in the 2MASS catalogue. Results. We find 24 warm debris candidates including 8 new candidates among A-K stars. The apparent debris disk frequency is estimated to be 2.8 ± 0.6%. We also find that A stars and solar-type FGK stars have different characteristics of the inner component of the identified debris disk candidates. While debris disks around A stars are cooler and consistent with steady-state evolutionary model of debris disks, those around FGK stars tend to be warmer and cannot be explained by the steady-state model en_US
dc.description.sponsorship H.F. and S.T. was financially supported by the Japan Society for the Promotion of Science (JSPS).This work was supported by KAKENHI (07J02823 and 23103002) and by the JSPS Institutional Program for Young Researcher Overseas Visits. en_US
dc.format.extent 15 pag. es_ES
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher ESO en_US
dc.relation.ispartof Astronomy and Astrophysics en_US
dc.rights © 2013 ESO en_US
dc.subject.other Circumstellar matter en_US
dc.subject.other Infrared: stars en_US
dc.subject.other Zodiacal dust en_US
dc.title AKARI/IRC 18 μm survey of warm debris disks en_US
dc.type article en
dc.subject.eciencia Física es_ES
dc.relation.publisherversion http://dx.doi.org/10.1051/0004-6361/201219841 es_ES
dc.identifier.doi 10.1051/0004-6361/201219841 es_ES
dc.identifier.publicationfirstpage A45 es_ES
dc.identifier.publicationvolume 550 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.rights.accessRights openAccess en
dc.authorUAM Marshall , Jonathan (264573)

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