Analysis of the IW And star ASAS J071404+7004.3
We made a time-resolved photometric campaign of the bright cataclysmic variable ASAS J071404+7004.3 in 2020. Inight et al. (2022, arXiv/2109.14514) recently published time-resolved optical spectroscopy, X-ray observations and long- and short-term optical variations. Although their results were corre...
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creator | Kato, Taichi Kasai, Kiyoshi Pavlenko, Elena P Pit, Nikolaj V Sosnovskij, Aleksei A Itoh, Hiroshi Akazawa, Hidehiko Brincat, Stephen M Keir, Leonid E Udovichenko, Sergei N Tampo, Yusuke Kojiguchi, Naoto Shibata, Masaaki Wakamatsu, Yasuyuki Tordai, Tamas Vanmunster, Tonny Galdies, Charles |
description | We made a time-resolved photometric campaign of the bright cataclysmic variable ASAS J071404+7004.3 in 2020. Inight et al. (2022, arXiv/2109.14514) recently published time-resolved optical spectroscopy, X-ray observations and long- and short-term optical variations. Although their results were correct in many parts, they classified ASAS J071404+7004.3 as a VY Scl-type novalike object. By comparing the ASAS-SN data of this object and the IW And-type object HO Pup, we showed that their type classification was incorrect. ASAS J071404+7004.3 showed outbursts from a standstill followed by shallow dips, which is the defining characteristic of an IW And star. This object predominantly showed states with low-amplitude dwarf nova-type oscillations, some of which could be identified as the "heartbeat"-type state as a variety of the IW And-type phenomenon. The low state described by Inight et al. (2022) was not a true low state of a VY Scl star, but a dwarf nova-type state with increased outburst amplitudes. Both ground-based (our campaign) and TESS observations detected orbital variations whose periods [0.136589(5) d by the ground-based campaign and 0.1366476(3) d by the TESS data] are in very good agreement with the one obtained by radial-velocity studies by Inight et al. (2022). The standstill in 2019-2020 in ASAS J071404+7004.3 was not brighter than its dwarf nova-type states. The brightest moment of this object occurred when the amplitudes of dwarf nova-type variations were large, which challenges the widely accepted interpretation that standstills in Z Cam stars occur when the mass-transfer rates are high. |
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Inight et al. (2022, arXiv/2109.14514) recently published time-resolved optical spectroscopy, X-ray observations and long- and short-term optical variations. Although their results were correct in many parts, they classified ASAS J071404+7004.3 as a VY Scl-type novalike object. By comparing the ASAS-SN data of this object and the IW And-type object HO Pup, we showed that their type classification was incorrect. ASAS J071404+7004.3 showed outbursts from a standstill followed by shallow dips, which is the defining characteristic of an IW And star. This object predominantly showed states with low-amplitude dwarf nova-type oscillations, some of which could be identified as the "heartbeat"-type state as a variety of the IW And-type phenomenon. The low state described by Inight et al. (2022) was not a true low state of a VY Scl star, but a dwarf nova-type state with increased outburst amplitudes. Both ground-based (our campaign) and TESS observations detected orbital variations whose periods [0.136589(5) d by the ground-based campaign and 0.1366476(3) d by the TESS data] are in very good agreement with the one obtained by radial-velocity studies by Inight et al. (2022). The standstill in 2019-2020 in ASAS J071404+7004.3 was not brighter than its dwarf nova-type states. The brightest moment of this object occurred when the amplitudes of dwarf nova-type variations were large, which challenges the widely accepted interpretation that standstills in Z Cam stars occur when the mass-transfer rates are high.</description><identifier>EISSN: 2331-8422</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Amplitudes ; Cataclysmic variables ; Dwarf novae ; Mass transfer ; Outbursts ; X-ray astronomy</subject><ispartof>arXiv.org, 2022-02</ispartof><rights>2022. This work is published under http://creativecommons.org/licenses/by-nc-sa/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>780,784</link.rule.ids></links><search><creatorcontrib>Kato, Taichi</creatorcontrib><creatorcontrib>Kasai, Kiyoshi</creatorcontrib><creatorcontrib>Pavlenko, Elena P</creatorcontrib><creatorcontrib>Pit, Nikolaj V</creatorcontrib><creatorcontrib>Sosnovskij, Aleksei A</creatorcontrib><creatorcontrib>Itoh, Hiroshi</creatorcontrib><creatorcontrib>Akazawa, Hidehiko</creatorcontrib><creatorcontrib>Brincat, Stephen M</creatorcontrib><creatorcontrib>Keir, Leonid E</creatorcontrib><creatorcontrib>Udovichenko, Sergei N</creatorcontrib><creatorcontrib>Tampo, Yusuke</creatorcontrib><creatorcontrib>Kojiguchi, Naoto</creatorcontrib><creatorcontrib>Shibata, Masaaki</creatorcontrib><creatorcontrib>Wakamatsu, Yasuyuki</creatorcontrib><creatorcontrib>Tordai, Tamas</creatorcontrib><creatorcontrib>Vanmunster, Tonny</creatorcontrib><creatorcontrib>Galdies, Charles</creatorcontrib><title>Analysis of the IW And star ASAS J071404+7004.3</title><title>arXiv.org</title><description>We made a time-resolved photometric campaign of the bright cataclysmic variable ASAS J071404+7004.3 in 2020. Inight et al. (2022, arXiv/2109.14514) recently published time-resolved optical spectroscopy, X-ray observations and long- and short-term optical variations. Although their results were correct in many parts, they classified ASAS J071404+7004.3 as a VY Scl-type novalike object. By comparing the ASAS-SN data of this object and the IW And-type object HO Pup, we showed that their type classification was incorrect. ASAS J071404+7004.3 showed outbursts from a standstill followed by shallow dips, which is the defining characteristic of an IW And star. This object predominantly showed states with low-amplitude dwarf nova-type oscillations, some of which could be identified as the "heartbeat"-type state as a variety of the IW And-type phenomenon. The low state described by Inight et al. (2022) was not a true low state of a VY Scl star, but a dwarf nova-type state with increased outburst amplitudes. Both ground-based (our campaign) and TESS observations detected orbital variations whose periods [0.136589(5) d by the ground-based campaign and 0.1366476(3) d by the TESS data] are in very good agreement with the one obtained by radial-velocity studies by Inight et al. (2022). The standstill in 2019-2020 in ASAS J071404+7004.3 was not brighter than its dwarf nova-type states. The brightest moment of this object occurred when the amplitudes of dwarf nova-type variations were large, which challenges the widely accepted interpretation that standstills in Z Cam stars occur when the mass-transfer rates are high.</description><subject>Amplitudes</subject><subject>Cataclysmic variables</subject><subject>Dwarf novae</subject><subject>Mass transfer</subject><subject>Outbursts</subject><subject>X-ray astronomy</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpjYuA0MjY21LUwMTLiYOAtLs4yMDAwMjM3MjU15mTQd8xLzKkszixWyE9TKMlIVfAMV3DMS1EoLkksUnAMdgxW8DIwNzQxMNE2NzAw0TPmYWBNS8wpTuWF0twMym6uIc4eugVF-YWlqcUl8Vn5pUVAM4vjjcyA1hoamZmaGBOnCgCBKS6W</recordid><startdate>20220223</startdate><enddate>20220223</enddate><creator>Kato, Taichi</creator><creator>Kasai, Kiyoshi</creator><creator>Pavlenko, Elena P</creator><creator>Pit, Nikolaj V</creator><creator>Sosnovskij, Aleksei A</creator><creator>Itoh, Hiroshi</creator><creator>Akazawa, Hidehiko</creator><creator>Brincat, Stephen M</creator><creator>Keir, Leonid E</creator><creator>Udovichenko, Sergei N</creator><creator>Tampo, Yusuke</creator><creator>Kojiguchi, Naoto</creator><creator>Shibata, Masaaki</creator><creator>Wakamatsu, Yasuyuki</creator><creator>Tordai, Tamas</creator><creator>Vanmunster, Tonny</creator><creator>Galdies, Charles</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20220223</creationdate><title>Analysis of the IW And star ASAS J071404+7004.3</title><author>Kato, Taichi ; Kasai, Kiyoshi ; Pavlenko, Elena P ; Pit, Nikolaj V ; Sosnovskij, Aleksei A ; Itoh, Hiroshi ; Akazawa, Hidehiko ; Brincat, Stephen M ; Keir, Leonid E ; Udovichenko, Sergei N ; Tampo, Yusuke ; Kojiguchi, Naoto ; Shibata, Masaaki ; Wakamatsu, Yasuyuki ; Tordai, Tamas ; Vanmunster, Tonny ; Galdies, Charles</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_26331126543</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Amplitudes</topic><topic>Cataclysmic variables</topic><topic>Dwarf novae</topic><topic>Mass transfer</topic><topic>Outbursts</topic><topic>X-ray astronomy</topic><toplevel>online_resources</toplevel><creatorcontrib>Kato, Taichi</creatorcontrib><creatorcontrib>Kasai, Kiyoshi</creatorcontrib><creatorcontrib>Pavlenko, Elena P</creatorcontrib><creatorcontrib>Pit, Nikolaj V</creatorcontrib><creatorcontrib>Sosnovskij, Aleksei A</creatorcontrib><creatorcontrib>Itoh, Hiroshi</creatorcontrib><creatorcontrib>Akazawa, Hidehiko</creatorcontrib><creatorcontrib>Brincat, Stephen M</creatorcontrib><creatorcontrib>Keir, Leonid E</creatorcontrib><creatorcontrib>Udovichenko, Sergei N</creatorcontrib><creatorcontrib>Tampo, Yusuke</creatorcontrib><creatorcontrib>Kojiguchi, Naoto</creatorcontrib><creatorcontrib>Shibata, Masaaki</creatorcontrib><creatorcontrib>Wakamatsu, Yasuyuki</creatorcontrib><creatorcontrib>Tordai, Tamas</creatorcontrib><creatorcontrib>Vanmunster, Tonny</creatorcontrib><creatorcontrib>Galdies, Charles</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kato, Taichi</au><au>Kasai, Kiyoshi</au><au>Pavlenko, Elena P</au><au>Pit, Nikolaj V</au><au>Sosnovskij, Aleksei A</au><au>Itoh, Hiroshi</au><au>Akazawa, Hidehiko</au><au>Brincat, Stephen M</au><au>Keir, Leonid E</au><au>Udovichenko, Sergei N</au><au>Tampo, Yusuke</au><au>Kojiguchi, Naoto</au><au>Shibata, Masaaki</au><au>Wakamatsu, Yasuyuki</au><au>Tordai, Tamas</au><au>Vanmunster, Tonny</au><au>Galdies, Charles</au><format>book</format><genre>document</genre><ristype>GEN</ristype><atitle>Analysis of the IW And star ASAS J071404+7004.3</atitle><jtitle>arXiv.org</jtitle><date>2022-02-23</date><risdate>2022</risdate><eissn>2331-8422</eissn><abstract>We made a time-resolved photometric campaign of the bright cataclysmic variable ASAS J071404+7004.3 in 2020. Inight et al. (2022, arXiv/2109.14514) recently published time-resolved optical spectroscopy, X-ray observations and long- and short-term optical variations. Although their results were correct in many parts, they classified ASAS J071404+7004.3 as a VY Scl-type novalike object. By comparing the ASAS-SN data of this object and the IW And-type object HO Pup, we showed that their type classification was incorrect. ASAS J071404+7004.3 showed outbursts from a standstill followed by shallow dips, which is the defining characteristic of an IW And star. This object predominantly showed states with low-amplitude dwarf nova-type oscillations, some of which could be identified as the "heartbeat"-type state as a variety of the IW And-type phenomenon. The low state described by Inight et al. (2022) was not a true low state of a VY Scl star, but a dwarf nova-type state with increased outburst amplitudes. Both ground-based (our campaign) and TESS observations detected orbital variations whose periods [0.136589(5) d by the ground-based campaign and 0.1366476(3) d by the TESS data] are in very good agreement with the one obtained by radial-velocity studies by Inight et al. (2022). The standstill in 2019-2020 in ASAS J071404+7004.3 was not brighter than its dwarf nova-type states. The brightest moment of this object occurred when the amplitudes of dwarf nova-type variations were large, which challenges the widely accepted interpretation that standstills in Z Cam stars occur when the mass-transfer rates are high.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><oa>free_for_read</oa></addata></record> |
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subjects | Amplitudes Cataclysmic variables Dwarf novae Mass transfer Outbursts X-ray astronomy |
title | Analysis of the IW And star ASAS J071404+7004.3 |
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