A wavelet analysis of photometric variability in Kepler white dwarf stars
Abstract This work describes a wavelet analysis of 14 Kepler white dwarf stars, in order to confirm their photometric variability behaviour and to search for periodicities in these targets. From the observed Kepler light curves we obtained the wavelet local and global power spectra. Through this pro...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2019-04, Vol.484 (3), p.3935-3940 |
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| container_title | Monthly notices of the Royal Astronomical Society |
| container_volume | 484 |
| creator | de Lira, S R Bravo, J P Leão, I C da Costa, A D Canto Martins, B L de Freitas, D B De Medeiros, J R |
| description | Abstract
This work describes a wavelet analysis of 14 Kepler white dwarf stars, in order to confirm their photometric variability behaviour and to search for periodicities in these targets. From the observed Kepler light curves we obtained the wavelet local and global power spectra. Through this procedure, one can perform an analysis in the time–frequency domain rich in detail, and so obtain a new perspective on the time evolution of the periodicities present in these stars. We identified a photometric variability behaviour in 10 white dwarfs, corresponding to period variations of ∼2 h to 18 d: among these stars, three are new candidates and seven, earlier identified from other studies, are confirmed. |
| doi_str_mv | 10.1093/mnras/stz122 |
| format | Article |
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This work describes a wavelet analysis of 14 Kepler white dwarf stars, in order to confirm their photometric variability behaviour and to search for periodicities in these targets. From the observed Kepler light curves we obtained the wavelet local and global power spectra. Through this procedure, one can perform an analysis in the time–frequency domain rich in detail, and so obtain a new perspective on the time evolution of the periodicities present in these stars. We identified a photometric variability behaviour in 10 white dwarfs, corresponding to period variations of ∼2 h to 18 d: among these stars, three are new candidates and seven, earlier identified from other studies, are confirmed.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stz122</identifier><language>eng</language><publisher>Oxford University Press</publisher><ispartof>Monthly notices of the Royal Astronomical Society, 2019-04, Vol.484 (3), p.3935-3940</ispartof><rights>2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c305t-6b3334a82f350abb855584fbc34f78b92936c187818214143ce332520b051cfb3</citedby><cites>FETCH-LOGICAL-c305t-6b3334a82f350abb855584fbc34f78b92936c187818214143ce332520b051cfb3</cites><orcidid>0000-0002-2702-231X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1604,27924,27925</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stz122$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc></links><search><creatorcontrib>de Lira, S R</creatorcontrib><creatorcontrib>Bravo, J P</creatorcontrib><creatorcontrib>Leão, I C</creatorcontrib><creatorcontrib>da Costa, A D</creatorcontrib><creatorcontrib>Canto Martins, B L</creatorcontrib><creatorcontrib>de Freitas, D B</creatorcontrib><creatorcontrib>De Medeiros, J R</creatorcontrib><title>A wavelet analysis of photometric variability in Kepler white dwarf stars</title><title>Monthly notices of the Royal Astronomical Society</title><description>Abstract
This work describes a wavelet analysis of 14 Kepler white dwarf stars, in order to confirm their photometric variability behaviour and to search for periodicities in these targets. From the observed Kepler light curves we obtained the wavelet local and global power spectra. Through this procedure, one can perform an analysis in the time–frequency domain rich in detail, and so obtain a new perspective on the time evolution of the periodicities present in these stars. We identified a photometric variability behaviour in 10 white dwarfs, corresponding to period variations of ∼2 h to 18 d: among these stars, three are new candidates and seven, earlier identified from other studies, are confirmed.</description><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp90L1OwzAYhWELgUQobFyANxZCbX-244xVBaWiEgvMkW1s1ShNIts0ClfPT5iZzvLoDC9C15TcUVLD8tBFnZYpf1LGTlBBQYqS1VKeooIQEKWqKD1HFym9E0I4MFmg7QqP-uhal7HudDulkHDv8bDvc39wOQaLjzoGbUIb8oRDh5_c0LqIx33IDr-NOnqcso7pEp153SZ39bcL9Ppw_7J-LHfPm-16tSstEJFLaQCAa8U8CKKNUUIIxb2xwH2lTM1qkJaqSlHFKKccrANgghFDBLXewALdzr829ilF55shhoOOU0NJ85Oh-c3QzBm--c3M-4_hf_kFRuVfxg</recordid><startdate>20190411</startdate><enddate>20190411</enddate><creator>de Lira, S R</creator><creator>Bravo, J P</creator><creator>Leão, I C</creator><creator>da Costa, A D</creator><creator>Canto Martins, B L</creator><creator>de Freitas, D B</creator><creator>De Medeiros, J R</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-2702-231X</orcidid></search><sort><creationdate>20190411</creationdate><title>A wavelet analysis of photometric variability in Kepler white dwarf stars</title><author>de Lira, S R ; Bravo, J P ; Leão, I C ; da Costa, A D ; Canto Martins, B L ; de Freitas, D B ; De Medeiros, J R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c305t-6b3334a82f350abb855584fbc34f78b92936c187818214143ce332520b051cfb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>de Lira, S R</creatorcontrib><creatorcontrib>Bravo, J P</creatorcontrib><creatorcontrib>Leão, I C</creatorcontrib><creatorcontrib>da Costa, A D</creatorcontrib><creatorcontrib>Canto Martins, B L</creatorcontrib><creatorcontrib>de Freitas, D B</creatorcontrib><creatorcontrib>De Medeiros, J R</creatorcontrib><collection>CrossRef</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>de Lira, S R</au><au>Bravo, J P</au><au>Leão, I C</au><au>da Costa, A D</au><au>Canto Martins, B L</au><au>de Freitas, D B</au><au>De Medeiros, J R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A wavelet analysis of photometric variability in Kepler white dwarf stars</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2019-04-11</date><risdate>2019</risdate><volume>484</volume><issue>3</issue><spage>3935</spage><epage>3940</epage><pages>3935-3940</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>Abstract
This work describes a wavelet analysis of 14 Kepler white dwarf stars, in order to confirm their photometric variability behaviour and to search for periodicities in these targets. From the observed Kepler light curves we obtained the wavelet local and global power spectra. Through this procedure, one can perform an analysis in the time–frequency domain rich in detail, and so obtain a new perspective on the time evolution of the periodicities present in these stars. We identified a photometric variability behaviour in 10 white dwarfs, corresponding to period variations of ∼2 h to 18 d: among these stars, three are new candidates and seven, earlier identified from other studies, are confirmed.</abstract><pub>Oxford University Press</pub><doi>10.1093/mnras/stz122</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0002-2702-231X</orcidid><oa>free_for_read</oa></addata></record> |
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| title | A wavelet analysis of photometric variability in Kepler white dwarf stars |
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