Diagnosing aerosols in extrasolar giant planets with cross-correlation function of water bands
Transmission spectroscopy with ground-based, high-resolution instruments provides key insight into the composition of exoplanetary atmospheres. Molecules such as water and carbon monoxide have been unambiguously identified in hot gas giants through cross-correlation techniques. A maximum in the cros...
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Veröffentlicht in: | Astronomy and astrophysics (Berlin) 2018-11, Vol.619, p.A3 |
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creator | Pino, Lorenzo Ehrenreich, David Allart, Romain Lovis, Christophe Brogi, Matteo Malik, Matej Nascimbeni, Valerio Pepe, Francesco Piotto, Giampaolo |
description | Transmission spectroscopy with ground-based, high-resolution instruments provides key insight into the composition of exoplanetary atmospheres. Molecules such as water and carbon monoxide have been unambiguously identified in hot gas giants through cross-correlation techniques. A maximum in the cross-correlation function (CCF) is found when the molecular absorption lines in a binary mask or model template match those contained in the planet. Here, we demonstrate how the CCF method can be used to diagnose broadband spectroscopic features such as scattering by aerosols in high-resolution transit spectra. The idea consists in exploiting the presence of multiple water bands from the optical to the near-infrared. We have produced a set of models of a typical hot Jupiter spanning various conditions of temperature and aerosol coverage. We demonstrate that comparing the CCFs of individual water bands for the models constrains the presence and the properties of the aerosol layers. The contrast difference between the CCFs of two bands can reach ~100 ppm, which could be readily detectable with current or upcoming high-resolution stabilized spectrographs spanning a wide spectral range, such as ESPRESSO, CARMENES, HARPS-N+GIANO, HARPS+NIRPS, SPIRou, or CRIRES+. |
doi_str_mv | 10.1051/0004-6361/201832986 |
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Molecules such as water and carbon monoxide have been unambiguously identified in hot gas giants through cross-correlation techniques. A maximum in the cross-correlation function (CCF) is found when the molecular absorption lines in a binary mask or model template match those contained in the planet. Here, we demonstrate how the CCF method can be used to diagnose broadband spectroscopic features such as scattering by aerosols in high-resolution transit spectra. The idea consists in exploiting the presence of multiple water bands from the optical to the near-infrared. We have produced a set of models of a typical hot Jupiter spanning various conditions of temperature and aerosol coverage. We demonstrate that comparing the CCFs of individual water bands for the models constrains the presence and the properties of the aerosol layers. The contrast difference between the CCFs of two bands can reach ~100 ppm, which could be readily detectable with current or upcoming high-resolution stabilized spectrographs spanning a wide spectral range, such as ESPRESSO, CARMENES, HARPS-N+GIANO, HARPS+NIRPS, SPIRou, or CRIRES+.</description><identifier>ISSN: 0004-6361</identifier><identifier>EISSN: 1432-0746</identifier><identifier>DOI: 10.1051/0004-6361/201832986</identifier><language>eng</language><publisher>Heidelberg: EDP Sciences</publisher><subject>Aerosols ; Broadband ; Carbon monoxide ; Cross correlation ; Extrasolar planets ; Gas giant planets ; High resolution ; Jupiter ; Molecular absorption ; planets and satellites: atmospheres ; planets and satellites: composition ; Spectrographs ; Spectrum analysis ; techniques: spectroscopic</subject><ispartof>Astronomy and astrophysics (Berlin), 2018-11, Vol.619, p.A3</ispartof><rights>Copyright EDP Sciences Nov 2018</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c360t-6bc2f6eff81bb3897823e414bbf2320de2ac57f197d67ec4505182f4b07008923</citedby><cites>FETCH-LOGICAL-c360t-6bc2f6eff81bb3897823e414bbf2320de2ac57f197d67ec4505182f4b07008923</cites><orcidid>0000-0002-1321-8856</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,3727,27924,27925</link.rule.ids></links><search><creatorcontrib>Pino, Lorenzo</creatorcontrib><creatorcontrib>Ehrenreich, David</creatorcontrib><creatorcontrib>Allart, Romain</creatorcontrib><creatorcontrib>Lovis, Christophe</creatorcontrib><creatorcontrib>Brogi, Matteo</creatorcontrib><creatorcontrib>Malik, Matej</creatorcontrib><creatorcontrib>Nascimbeni, Valerio</creatorcontrib><creatorcontrib>Pepe, Francesco</creatorcontrib><creatorcontrib>Piotto, Giampaolo</creatorcontrib><title>Diagnosing aerosols in extrasolar giant planets with cross-correlation function of water bands</title><title>Astronomy and astrophysics (Berlin)</title><description>Transmission spectroscopy with ground-based, high-resolution instruments provides key insight into the composition of exoplanetary atmospheres. Molecules such as water and carbon monoxide have been unambiguously identified in hot gas giants through cross-correlation techniques. A maximum in the cross-correlation function (CCF) is found when the molecular absorption lines in a binary mask or model template match those contained in the planet. Here, we demonstrate how the CCF method can be used to diagnose broadband spectroscopic features such as scattering by aerosols in high-resolution transit spectra. The idea consists in exploiting the presence of multiple water bands from the optical to the near-infrared. We have produced a set of models of a typical hot Jupiter spanning various conditions of temperature and aerosol coverage. We demonstrate that comparing the CCFs of individual water bands for the models constrains the presence and the properties of the aerosol layers. The contrast difference between the CCFs of two bands can reach ~100 ppm, which could be readily detectable with current or upcoming high-resolution stabilized spectrographs spanning a wide spectral range, such as ESPRESSO, CARMENES, HARPS-N+GIANO, HARPS+NIRPS, SPIRou, or CRIRES+.</description><subject>Aerosols</subject><subject>Broadband</subject><subject>Carbon monoxide</subject><subject>Cross correlation</subject><subject>Extrasolar planets</subject><subject>Gas giant planets</subject><subject>High resolution</subject><subject>Jupiter</subject><subject>Molecular absorption</subject><subject>planets and satellites: atmospheres</subject><subject>planets and satellites: composition</subject><subject>Spectrographs</subject><subject>Spectrum analysis</subject><subject>techniques: spectroscopic</subject><issn>0004-6361</issn><issn>1432-0746</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNo9kEtPAjEUhRujiYj-AjdNXI_0NW1naUDUiHGjkriw6QwtFscOtiXgv7eAYXXvSb5zHweAS4yuMSrxACHECk45HhCEJSWV5EeghxklBRKMH4PegTgFZzEusiQZ7IGPkdNz30Xn51Cb0MWujdB5aDYp6Cx0gHOnfYLLVnuTIly79AmbDMai6UIwrU6u89CufLNrOgvXOpkAa-1n8RycWN1Gc_Ff--B1fPsyvC8mz3cPw5tJ0VCOUsHrhlhurJW4rqmshCTUMMzq2hJK0MwQ3ZTC4krMuDANK_PTklhWI4GQrAjtg6v93GXoflYmJrXoVsHnlYpghlBVUsEyRffU7v5grFoG963Dr8JIbYNU25jUNiZ1CDK7ir3LxWQ2B4sOX4oLKkol0VSJx_fR0_htqsb0D_YsdZI</recordid><startdate>20181101</startdate><enddate>20181101</enddate><creator>Pino, Lorenzo</creator><creator>Ehrenreich, David</creator><creator>Allart, Romain</creator><creator>Lovis, Christophe</creator><creator>Brogi, Matteo</creator><creator>Malik, Matej</creator><creator>Nascimbeni, Valerio</creator><creator>Pepe, Francesco</creator><creator>Piotto, Giampaolo</creator><general>EDP Sciences</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-1321-8856</orcidid></search><sort><creationdate>20181101</creationdate><title>Diagnosing aerosols in extrasolar giant planets with cross-correlation function of water bands</title><author>Pino, Lorenzo ; Ehrenreich, David ; Allart, Romain ; Lovis, Christophe ; Brogi, Matteo ; Malik, Matej ; Nascimbeni, Valerio ; Pepe, Francesco ; Piotto, Giampaolo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c360t-6bc2f6eff81bb3897823e414bbf2320de2ac57f197d67ec4505182f4b07008923</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Aerosols</topic><topic>Broadband</topic><topic>Carbon monoxide</topic><topic>Cross correlation</topic><topic>Extrasolar planets</topic><topic>Gas giant planets</topic><topic>High resolution</topic><topic>Jupiter</topic><topic>Molecular absorption</topic><topic>planets and satellites: atmospheres</topic><topic>planets and satellites: composition</topic><topic>Spectrographs</topic><topic>Spectrum analysis</topic><topic>techniques: spectroscopic</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pino, Lorenzo</creatorcontrib><creatorcontrib>Ehrenreich, David</creatorcontrib><creatorcontrib>Allart, Romain</creatorcontrib><creatorcontrib>Lovis, Christophe</creatorcontrib><creatorcontrib>Brogi, Matteo</creatorcontrib><creatorcontrib>Malik, Matej</creatorcontrib><creatorcontrib>Nascimbeni, Valerio</creatorcontrib><creatorcontrib>Pepe, Francesco</creatorcontrib><creatorcontrib>Piotto, Giampaolo</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Astronomy and astrophysics (Berlin)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pino, Lorenzo</au><au>Ehrenreich, David</au><au>Allart, Romain</au><au>Lovis, Christophe</au><au>Brogi, Matteo</au><au>Malik, Matej</au><au>Nascimbeni, Valerio</au><au>Pepe, Francesco</au><au>Piotto, Giampaolo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Diagnosing aerosols in extrasolar giant planets with cross-correlation function of water bands</atitle><jtitle>Astronomy and astrophysics (Berlin)</jtitle><date>2018-11-01</date><risdate>2018</risdate><volume>619</volume><spage>A3</spage><pages>A3-</pages><issn>0004-6361</issn><eissn>1432-0746</eissn><abstract>Transmission spectroscopy with ground-based, high-resolution instruments provides key insight into the composition of exoplanetary atmospheres. Molecules such as water and carbon monoxide have been unambiguously identified in hot gas giants through cross-correlation techniques. A maximum in the cross-correlation function (CCF) is found when the molecular absorption lines in a binary mask or model template match those contained in the planet. Here, we demonstrate how the CCF method can be used to diagnose broadband spectroscopic features such as scattering by aerosols in high-resolution transit spectra. The idea consists in exploiting the presence of multiple water bands from the optical to the near-infrared. We have produced a set of models of a typical hot Jupiter spanning various conditions of temperature and aerosol coverage. We demonstrate that comparing the CCFs of individual water bands for the models constrains the presence and the properties of the aerosol layers. The contrast difference between the CCFs of two bands can reach ~100 ppm, which could be readily detectable with current or upcoming high-resolution stabilized spectrographs spanning a wide spectral range, such as ESPRESSO, CARMENES, HARPS-N+GIANO, HARPS+NIRPS, SPIRou, or CRIRES+.</abstract><cop>Heidelberg</cop><pub>EDP Sciences</pub><doi>10.1051/0004-6361/201832986</doi><orcidid>https://orcid.org/0000-0002-1321-8856</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Aerosols Broadband Carbon monoxide Cross correlation Extrasolar planets Gas giant planets High resolution Jupiter Molecular absorption planets and satellites: atmospheres planets and satellites: composition Spectrographs Spectrum analysis techniques: spectroscopic |
title | Diagnosing aerosols in extrasolar giant planets with cross-correlation function of water bands |
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