OTa€‰J075418.7+381225 and OTa€‰J230425.8+062546: Promising candidates for the period bouncer

Nakata Chikako; Kato Taichi; Nogami Daisaku; Pavlenko Elena P.; Ohshima Tomohito; de Miguel Enrique; Stein William; Siokawa Kazuhiko; Morelle Etienne; Itoh Hiroshi; Dubovsky Pavol A.; Kudzej Igor; Maehara Hiroyuki; Henden Arne; Goff William N.; Dvorak Shawn; Antonyuk Oksana I.; Muyllaert Eddy

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OTa€‰J075418.7+381225 and OTa€‰J230425.8+062546: Promising candidates for the period bouncer

机译：OTaJJ075418.7 + 381225和OTaJJ230425.8 + 062546：期间保镖的有希望的候选人

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Wereportonphotometricobservationsoftwodwarfnovae,OTa€‰J075418.7+381225andOTa€‰J230425.8+062546,whichshowedsuperoutburstsin2013(OTa€‰J075418)andin2011(OTa€‰J230425).Theirmeanperiodsofthesuperhumpwere0.0722403(26)a€‰d(OTa€‰J075418)and0.067317(35)a€‰d(OTa€‰J230425).Theseobjectsshowedaverylonggrowthstageofthesuperhump(stageA)andalargeperioddecreaseinthestageAa€“Btransition.ThelongstageAsuggestsslowevolutionofthesuperhumpduetotheverysmallmassratiooftheseobjects.ThedecliningratesduringtheplateauphaseinthesuperoutburstoftheseobjectswerelowerthanthoseofSUa€‰UMa-typedwarfnovae(DNe)withasimilarsuperhumpperiod.ThesepropertiesweresimilartothoseofSSSa€‰J122221.7a?’311523,themostlikelycandidatefortheperiodbouncer.Therefore,thesetwoDNeareregardedaslikelycandidatesfortheperiodbouncer.Weestimatedthenumberdensityofperiodbouncersroughlyfromourobservationsforthelastfiveyears.ThereisapossibilitythattheseWZa€‰Sge-typeDNewithunusualoutburstpropertiesmightaccountforthemissingpopulationoftheperiodbouncersuggestedbytheevolutionaryscenario.

机译：我们报告了光度观测软变暖新星，OTa J075418.7 + 381225和OTa J230425.8 + 062546，其中在2013年（OTaJ075418）和2011年（OTaJ230425）表现出超级爆发。其平均周期软度和超级驼峰分别为0.0722403（26）a和0722403（26）a 0.067317（35）一个€‰d（OTA€‰J230425）.Theseobjectsshowedaverylonggrowthstageofthesuperhump（STAGEA）andalargeperioddecreaseinthestageAa€“Btransition.ThelongstageAsuggestsslowevolutionofthesuperhumpduetotheverysmallmassratiooftheseobjects.ThedecliningratesduringtheplateauphaseinthesuperoutburstoftheseobjectswerelowerthanthoseofSUa€‰UMA-typedwarfnovae（DNE）withasimilarsuperhumpperiod.ThesepropertiesweresimilartothoseofSSSa€‰J122221.7a？311523，themostlikelycandidatefortheperiodbouncer。因此，这两个DN可能是periodbouncer的候选者。我们从最近五年的观察中大致估计了periodbouncer的密度。存在这样的可能性，即WZ属于Sge型DNe，其异常爆发的原因可能是由于缺少种群造成的。进化论情景

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《PASJ: Publications of the Astronomical Society of Japan》 |2014年第6期|共页
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Nakata Chikako; Kato Taichi; Nogami Daisaku; Pavlenko Elena P.; Ohshima Tomohito; de Miguel Enrique; Stein William; Siokawa Kazuhiko; Morelle Etienne; Itoh Hiroshi; Dubovsky Pavol A.; Kudzej Igor; Maehara Hiroyuki; Henden Arne; Goff William N.; Dvorak Shawn; Antonyuk Oksana I.; Muyllaert Eddy;
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1. OT J075418.7+381225 and OT J230425.8+062546: Promising candidates for the period bouncer [J] . Nakata Chikako, Kato Taichi, Nogami Daisaku, PASJ: Publications of the Astronomical Society of Japan . 2014,第6期

机译：OT J075418.7 + 381225和OT J230425.8 + 062546：期间保镖的有前途的候选人
2. ASASSN-16dt and ASASSN-16hg: Promising candidate period bouncers [J] . Kimura Mariko, Isogai Keisuke, Kato Taichi, PASJ: Publications of the Astronomical Society of Japan . 2018,第3期

机译：ASASSN-16dt和ASASSN-16hg：有前途的候选期保镖
3. ASASSN-16dt and ASASSN-16hg: Promising candidate period bouncers [J] . Kimura Mariko, Isogai Keisuke, Kato Taichi, PASJ: Publications of the Astronomical Society of Japan . 2018,第3期

机译：Asassn-16dt和asassn-16hg：有前途的候选期间击败
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7. OT J075418.7+381225 and OT J230425.8+062546: Promising Candidates for the Period Bouncer [O] . Nakata, Chikako, Kato, Taichi, Nogami, Daisaku, 2014

机译：OT J075418.7 + 381225和OT J230425.8 + 062546：有希望的候选人期间保镖

OTa€‰J075418.7+381225 and OTa€‰J230425.8+062546: Promising candidates for the period bouncer

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