SNe 2019vxm and 2020tlf: two luminous type II Supernovae with signatures of circumstellar interaction

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astronomische Nachrichten Pub Date : 2024-02-24 DOI:10.1002/asna.20230166

Dmitry Yu Tsvetkov, Nickolay N. Pavlyuk, Alexandr V. Dodin, Nickolay I. Shatsky, Sergey A. Potanin, Nataliya P. Ikonnikova, Marina A. Burlak, Aleksandr A. Belinskii, Igor M. Volkov, Vsevolod A. Echeistov

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引用次数: 0

Abstract

We present optical spectroscopic and photometric observations of type II SNe 2019vxm and 2020tlf. The photometric monitoring of SN 2019vxm continued for 592 days, two spectra were collected. SN 2020tlf was observed for 163 days and we obtained one spectra. The maximum luminosity of both SNe is high: $M_{V} = - 20.0, - 18.33$ mag for SN 2019vxm and SN 2020tlf, respectively. SN 2019vxm displays typical for most of SNe IIn photometric evolution: long rise to the maximum and slow brightness decline with several changes of the decline rate. The light curve of SN 2020tlf shows it may be considered as an intermediate object between classes II-P and II-L. The spectral evolution of SN 2019vxm was typical for SNe IIn, while for SN 2020tlf only weak signs of circumstellar interaction were observed at maximum light.

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SNe 2019vxm 和 2020tlf：两颗具有星周相互作用特征的高能 II 型超新星

我们展示了对II型SNe 2019vxm和2020tlf的光学光谱和测光观测结果。对SN 2019vxm的光度监测持续了592天，收集到两张光谱。对 SN 2020tlf 的观测持续了 163 天，我们获得了一张光谱。两个SNe的最大光度都很高：SN 2019vxm和SN 2020tlf的最大光度分别为mag。SN 2019vxm的光度演化与大多数SNe IIn的光度演化一样典型：亮度上升到最大值的时间较长，而亮度下降的速度较慢，且下降速率有多次变化。从SN 2020tlf的光变曲线来看，它可以被视为介于II-P级和II-L级之间的天体。SN 2019vxm的光谱演化是典型的SNe IIn，而SN 2020tlf在最大亮度时仅观察到微弱的星周相互作用迹象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Astronomische Nachrichten 地学天文-天文与天体物理

CiteScore

1.80

自引率

11.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Astronomische Nachrichten, founded in 1821 by H. C. Schumacher, is the oldest astronomical journal worldwide still being published. Famous astronomical discoveries and important papers on astronomy and astrophysics published in more than 300 volumes of the journal give an outstanding representation of the progress of astronomical research over the last 180 years. Today, Astronomical Notes/ Astronomische Nachrichten publishes articles in the field of observational and theoretical astrophysics and related topics in solar-system and solar physics. Additional, papers on astronomical instrumentation ground-based and space-based as well as papers about numerical astrophysical techniques and supercomputer modelling are covered. Papers can be completed by short video sequences in the electronic version. Astronomical Notes/ Astronomische Nachrichten also publishes special issues of meeting proceedings.