Faint warm debris disks around nearby bright stars explored by AKARI and IRSF

<!DOCTYPE html>     <html class="no-js" lang="en">  <head> <title>Faint warm debris disks around nearby bright stars explored by AKARI and IRSF - NASA/ADS</title>  <link rel="apple-touch-icon" sizes="180x180" href="//styles/favicon/apple-touch-icon.png" /> <link rel="icon" type="image/png" sizes="32x32" href="//styles/favicon/favicon-32x32.png" /> <link rel="icon" type="image/png" sizes="16x16" href="//styles/favicon/favicon-16x16.png" /> <link rel="manifest" href="//styles/favicon/site.webmanifest" /> <link rel="mask-icon" href="//styles/favicon/safari-pinned-tab.svg" color="#5bbad5" /> <meta name="apple-mobile-web-app-title" content="NASA ADS" /> <meta name="application-name" content="NASA ADS" /> <meta name="msapplication-TileColor" content="#ffc40d" /> <meta name="theme-color" content="#ffffff" />  <link rel="stylesheet" href="/styles/css/styles.css"> <meta name="robots" content="noarchive"> <link rel="canonical" href="http://ui.adsabs.harvard.edu/abs/2017A&A...601A..72I/abstract"/> <meta name="description" content="Context. Debris disks are important observational clues for understanding planetary-system formation process. In particular, faint warm debris disks may be related to late planet formation near 1 au. A systematic search of faint warm debris disks is necessary to reveal terrestrial planet formation. <BR /> Aims: Faint warm debris disks show excess emission that peaks at mid-IR wavelengths. Thus we explore debris disks using the AKARI mid-IR all-sky point source catalog (PSC), a product of the second generation unbiased IR all-sky survey. <BR /> Methods: We investigate IR excess emission for 678 isolated main-sequence stars for which there are 18 渭m detections in the AKARI mid-IR all-sky catalog by comparing their fluxes with the predicted fluxes of the photospheres based on optical to near-IR fluxes and model spectra. The near-IR fluxes are first taken from the 2MASS PSC. However, 286 stars with Ks &lt; 4.5 in our sample have large flux errors in the 2MASS photometry due to saturation. Thus we have measured accurate J, H, and Ks band fluxes, applying neutral density (ND) filters for Simultaneous InfraRed Imager for Unbiased Survey (SIRIUS) on IRSF, the 蠁1.4 m near-IR telescope in South Africa, and improved the flux accuracy from 14% to 1.8% on average. <BR /> Results: We identified 53 debris-disk candidates including eight new detections from our sample of 678 main-sequence stars. The detection rate of debris disks for this work is 8%, which is comparable with those in previous works by Spitzer and Herschel. <BR /> Conclusions: The importance of this study is the detection of faint warm debris disks around nearby field stars. At least nine objects have a large amount of dust for their ages, which cannot be explained by the conventional steady-state collisional cascade model. <P />The full version of Table 2 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/601/A72">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/601/A72</A>">  <meta property="og:type" content="article"> <meta property="og:title" content="Faint warm debris disks around nearby bright stars explored by AKARI and IRSF"> <meta property="og:site_name" content="NASA/ADS"> <meta property="og:description" content="Context. Debris disks are important observational clues for understanding planetary-system formation process. In particular, faint warm debris disks may be related to late planet formation near 1 au. A systematic search of faint warm debris disks is necessary to reveal terrestrial planet formation. <BR /> Aims: Faint warm debris disks show excess emission that peaks at mid-IR wavelengths. Thus we explore debris disks using the AKARI mid-IR all-sky point source catalog (PSC), a product of the second generation unbiased IR all-sky survey. <BR /> Methods: We investigate IR excess emission for 678 isolated main-sequence stars for which there are 18 渭m detections in the AKARI mid-IR all-sky catalog by comparing their fluxes with the predicted fluxes of the photospheres based on optical to near-IR fluxes and model spectra. The near-IR fluxes are first taken from the 2MASS PSC. However, 286 stars with Ks &lt; 4.5 in our sample have large flux errors in the 2MASS photometry due to saturation. Thus we have measured accurate J, H, and Ks band fluxes, applying neutral density (ND) filters for Simultaneous InfraRed Imager for Unbiased Survey (SIRIUS) on IRSF, the 蠁1.4 m near-IR telescope in South Africa, and improved the flux accuracy from 14% to 1.8% on average. <BR /> Results: We identified 53 debris-disk candidates including eight new detections from our sample of 678 main-sequence stars. The detection rate of debris disks for this work is 8%, which is comparable with those in previous works by Spitzer and Herschel. <BR /> Conclusions: The importance of this study is the detection of faint warm debris disks around nearby field stars. At least nine objects have a large amount of dust for their ages, which cannot be explained by the conventional steady-state collisional cascade model. <P />The full version of Table 2 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/601/A72">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/601/A72</A>"> <meta property="og:url" content="https://ui.adsabs.harvard.edu/abs/2017A&A...601A..72I/abstract"> <meta property="og:image" content="https://ui.adsabs.harvard.edu/styles/img/transparent_logo.svg"> <meta property="article:published_time" content="05/2017"> <meta property="article:author" content="Ishihara, Daisuke"> <meta property="article:author" content="Takeuchi, Nami"> <meta property="article:author" content="Kobayashi, Hiroshi"> <meta property="article:author" content="Nagayama, Takahiro"> <meta property="article:author" content="Kaneda, Hidehiro"> <meta property="article:author" content="Inutsuka, Shu-ichiro"> <meta property="article:author" content="Fujiwara, Hideaki"> <meta property="article:author" content="Onaka, Takashi">  <meta name="citation_journal_title" content="Astronomy and Astrophysics"> <meta name="citation_authors" content="Ishihara, Daisuke;Takeuchi, Nami;Kobayashi, Hiroshi;Nagayama, Takahiro;Kaneda, Hidehiro;Inutsuka, Shu-ichiro;Fujiwara, Hideaki;Onaka, Takashi"> <meta name="citation_title" content="Faint warm debris disks around nearby bright stars explored by AKARI and IRSF"> <meta name="citation_date" content="05/2017"> <meta name="citation_volume" content="601"> <meta name="citation_firstpage" content="A72"> <meta name="citation_doi" content="10.1051/0004-6361/201526215"> <meta name="citation_issn" content="0004-6361"> <meta name="citation_language" content="en"> <meta name="citation_keywords" content="circumstellar matter"> <meta name="citation_keywords" content="zodiacal dust"> <meta name="citation_keywords" content="infrared: stars"> <meta name="citation_keywords" content="Astrophysics - Solar and Stellar Astrophysics"> <meta name="citation_keywords" content="Astrophysics - Earth and Planetary Astrophysics"> <meta name="citation_abstract_html_url" content="https://ui.adsabs.harvard.edu/abs/2017A&A...601A..72I/abstract"> <meta name="citation_publication_date" content="05/2017"> <meta name="citation_pdf_url" content="https://ui.adsabs.harvard.edu/link_gateway/2017A&A...601A..72I/PUB_PDF"> <meta name="citation_arxiv_id" content="arXiv:1608.04480" /> <link title="schema(PRISM)" rel="schema.prism" href="http://prismstandard.org/namespaces/1.2/basic/" /> <meta name="prism.publicationDate" content="05/2017" /> <meta name="prism.publicationName" content="A&A" /> <meta name="prism.issn" content="0004-6361" /> <meta name="prism.volume" content="601" /> <meta name="prism.startingPage" content="A72" /> <link title="schema(DC)" rel="schema.dc" href="http://purl.org/dc/elements/1.1/" /> <meta name="dc.identifier" content="doi:10.1051/0004-6361/201526215" /> <meta name="dc.date" content="05/2017" /> <meta name="dc.source" content="A&A" /> <meta name="dc.title" content="Faint warm debris disks around nearby bright stars explored by AKARI and IRSF" /> <meta name="dc.creator" content="Ishihara, Daisuke"> <meta name="dc.creator" content="Takeuchi, Nami"> <meta name="dc.creator" content="Kobayashi, Hiroshi"> <meta name="dc.creator" content="Nagayama, Takahiro"> <meta name="dc.creator" content="Kaneda, Hidehiro"> <meta name="dc.creator" content="Inutsuka, Shu-ichiro"> <meta name="dc.creator" content="Fujiwara, Hideaki"> <meta name="dc.creator" content="Onaka, Takashi">  <meta name="twitter:card" content="summary_large_image"/> <meta name="twitter:description" content="Context. Debris disks are important observational clues for understanding planetary-system formation process. In particular, faint warm debris disks may be related to late planet formation near 1 au. A systematic search of faint warm debris disks is necessary to reveal terrestrial planet formation. <BR /> Aims: Faint warm debris disks show excess emission that peaks at mid-IR wavelengths. Thus we explore debris disks using the AKARI mid-IR all-sky point source catalog (PSC), a product of the second generation unbiased IR all-sky survey. <BR /> Methods: We investigate IR excess emission for 678 isolated main-sequence stars for which there are 18 渭m detections in the AKARI mid-IR all-sky catalog by comparing their fluxes with the predicted fluxes of the photospheres based on optical to near-IR fluxes and model spectra. The near-IR fluxes are first taken from the 2MASS PSC. However, 286 stars with Ks &lt; 4.5 in our sample have large flux errors in the 2MASS photometry due to saturation. Thus we have measured accurate J, H, and Ks band fluxes, applying neutral density (ND) filters for Simultaneous InfraRed Imager for Unbiased Survey (SIRIUS) on IRSF, the 蠁1.4 m near-IR telescope in South Africa, and improved the flux accuracy from 14% to 1.8% on average. <BR /> Results: We identified 53 debris-disk candidates including eight new detections from our sample of 678 main-sequence stars. The detection rate of debris disks for this work is 8%, which is comparable with those in previous works by Spitzer and Herschel. <BR /> Conclusions: The importance of this study is the detection of faint warm debris disks around nearby field stars. At least nine objects have a large amount of dust for their ages, which cannot be explained by the conventional steady-state collisional cascade model. <P />The full version of Table 2 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/601/A72">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/601/A72</A>"/> <meta name="twitter:title" content="Faint warm debris disks around nearby bright stars explored by AKARI and IRSF"/> <meta name="twitter:site" content="@adsabs"/> <meta name="twitter:domain" content="NASA/ADS"/> <meta name="twitter:image:src" content="https://ui.adsabs.harvard.edu/styles/img/transparent_logo.svg"/> <meta name="twitter:creator" content="@adsabs"/> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <base href="/"> <style> .btn-full-ads { color: #fff !important; 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<li class="author"><a href="/search/?q=author%3A%22Takeuchi%2C+Nami%22">Takeuchi, Nami</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Kobayashi%2C+Hiroshi%22">Kobayashi, Hiroshi</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Nagayama%2C+Takahiro%22">Nagayama, Takahiro</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Kaneda%2C+Hidehiro%22">Kaneda, Hidehiro</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Inutsuka%2C+Shu-ichiro%22">Inutsuka, Shu-ichiro</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Fujiwara%2C+Hideaki%22">Fujiwara, Hideaki</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Onaka%2C+Takashi%22">Onaka, Takashi</a> </li> </ul> </div> <div class="s-abstract-text"> <h4 class="sr-only">Abstract</h4> <p> Context. Debris disks are important observational clues for understanding planetary-system formation process. In particular, faint warm debris disks may be related to late planet formation near 1 au. A systematic search of faint warm debris disks is necessary to reveal terrestrial planet formation. <BR /> Aims: Faint warm debris disks show excess emission that peaks at mid-IR wavelengths. Thus we explore debris disks using the AKARI mid-IR all-sky point source catalog (PSC), a product of the second generation unbiased IR all-sky survey. <BR /> Methods: We investigate IR excess emission for 678 isolated main-sequence stars for which there are 18 渭m detections in the AKARI mid-IR all-sky catalog by comparing their fluxes with the predicted fluxes of the photospheres based on optical to near-IR fluxes and model spectra. The near-IR fluxes are first taken from the 2MASS PSC. However, 286 stars with Ks < 4.5 in our sample have large flux errors in the 2MASS photometry due to saturation. Thus we have measured accurate J, H, and Ks band fluxes, applying neutral density (ND) filters for Simultaneous InfraRed Imager for Unbiased Survey (SIRIUS) on IRSF, the 蠁1.4 m near-IR telescope in South Africa, and improved the flux accuracy from 14% to 1.8% on average. <BR /> Results: We identified 53 debris-disk candidates including eight new detections from our sample of 678 main-sequence stars. The detection rate of debris disks for this work is 8%, which is comparable with those in previous works by Spitzer and Herschel. <BR /> Conclusions: The importance of this study is the detection of faint warm debris disks around nearby field stars. At least nine objects have a large amount of dust for their ages, which cannot be explained by the conventional steady-state collisional cascade model. <P />The full version of Table 2 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/601/A72">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/601/A72</A> </p> </div> <br> <dl class="s-abstract-dl-horizontal"> <dt>Publication:</dt> <dd> <div id="article-publication">Astronomy and Astrophysics</div> </dd> <dt>Pub Date:</dt> <dd>May 2017</dd> <dt>DOI:</dt> <dd> <span> <a href="/link_gateway/2017A&A...601A..72I/doi:10.1051/0004-6361/201526215" target="_blank" rel="noopener">10.1051/0004-6361/201526215</a> <i class="fa fa-external-link"></i> </span> </dd> <dt>arXiv:</dt> <dd> <span> <a href="/link_gateway/2017A&A...601A..72I/arXiv:1608.04480" target="_blank" rel="noopener">arXiv:1608.04480</a> <i class="fa fa-external-link"></i> </span> </dd> <dt>Bibcode:</dt> <dd> <a href="/abs/2017A%26A...601A..72I/abstract"> 2017A&A...601A..72I </a> <i class="icon-help" title="The bibcode is assigned by the ADS as a unique identifier for the paper."></i> </dd> <dt>Keywords:</dt> <dd> <ul class="list-inline"> <li>circumstellar matter;</li> <li>zodiacal dust;</li> <li>infrared: stars;</li> <li>Astrophysics - Solar and Stellar Astrophysics;</li> <li>Astrophysics - Earth and Planetary Astrophysics</li> </ul> </dd> <dt>E-Print:</dt> <dd> 17 pages, 21 figures, accepted for publication in Astronomy and Astrophysics </dd> </dl> </article> </div> <div data-widget="ShowCitations"></div> <div data-widget="ShowReferences"></div> <div data-widget="ShowCoreads"></div> <div data-widget="ShowSimilar"></div> <div data-widget="ShowTableofcontents"></div> <div data-widget="ShowGraphics"></div> <div data-widget="ShowExportcitation" data-origin="abstract"></div> <div 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Faint warm debris disks around nearby bright stars explored by AKARI and IRSF - NASA/ADS