Discovery and Rapid Follow-up Observations of the Unusual Type II SN 2018ivc in NGC 1068
Discovery and Rapid Follow-up Observations of the Unusual Type II SN 2018ivc in NGC 1068
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NGC 1068 中不寻常的 II 型 SN 2018ivc 的发现和快速后续观测
DOI：
10.3847/1538-4357/ab8945
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发表时间：
2019-09
影响因子：
4.9
通讯作者：
K. A. et al.
中科院分区：
文献类型：
--
作者：
Bostroem;K. A. et al.
我们提出了SN 2018ivc的发现和高节奏的后续观测，这是一个不寻常的SNe II，在NGC 1068（D = 10.1 Mpc）中爆炸。SN 2018ivc的光变曲线呈分段线性下降，斜率变化频繁，在演化的前30天内有四次明显的斜率变化。这种快速变化的光变曲线表明，星周物质和喷出物之间的相互作用在演化中起着重要作用。星周相互作用进一步得到了强X射线探测的支持。光谱迅速演变，主要由氢，氦和钙发射线。我们发现了一个罕见的高速发射线特征，蓝移到7800（在Hα，Hβ，Pβ，Pγ，He i和Ca ii中），从第18天到至少第78天都可以看到，这可能是不对称的祖先或爆炸的证据。根据SN 2018ivc和SN 1996al之间的整体相似性，其母恒星H ii区域的Hα等效宽度，以及爆炸前存档的哈勃太空望远镜图像的限制，我们发现SN 2018ivc的前身质量可能为52，但更可能小于12。SN 2018ivc证明了早期发现和快速跟踪观测附近超新星的重要性，以研究这些宇宙爆炸的物理和祖先。
We present the discovery and high-cadence follow-up observations of SN 2018ivc, an unusual SNe II that exploded in NGC 1068 (D = 10.1 Mpc). The light curve of SN 2018ivc declines piecewise-linearly, changing slope frequently, with four clear slope changes in the first 30 days of evolution. This rapidly changing light curve indicates that interaction between the circumstellar material and ejecta plays a significant role in the evolution. Circumstellar interaction is further supported by a strong X-ray detection. The spectra are rapidly evolving and dominated by hydrogen, helium, and calcium emission lines. We identify a rare high-velocity emission-line feature blueshifted at ∼7800 (in Hα, Hβ, Pβ, Pγ, He i, and Ca ii), which is visible from day 18 until at least day 78 and could be evidence of an asymmetric progenitor or explosion. From the overall similarity between SN 2018ivc and SN 1996al, the Hα equivalent width of its parent H ii region, and constraints from pre-explosion archival Hubble Space Telescope images, we find that the progenitor of SN 2018ivc could be as massive as 52 but is more likely <12 . SN 2018ivc demonstrates the importance of the early discovery and rapid follow-up observations of nearby supernovae to study the physics and progenitors of these cosmic explosions.
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影响因子：
3.5
作者：
G. de Vaucouleurs;A. de Vaucouleurs;R. Buta;H. Ables;A. Hewitt
通讯作者：
G. de Vaucouleurs;A. de Vaucouleurs;R. Buta;H. Ables;A. Hewitt
DOI：
10.1086/498014
发表时间：
2005-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
R. Quimby;P. Hoeflich;S. Kannappan;E. Rykoff;W. Rujopakarn;C. Akerlof;C. Gerardy;J. C. W. U. O. Texas;U. Michigan;I. College
通讯作者：
R. Quimby;P. Hoeflich;S. Kannappan;E. Rykoff;W. Rujopakarn;C. Akerlof;C. Gerardy;J. C. W. U. O. Texas;U. Michigan;I. College
影响因子：
4.8
作者：
C. Kochanek;M. Fraser;S. Adams;T. Sukhbold;J. Prieto;T. Muller;G. Bock;J. Brown;S. Dong
通讯作者：
C. Kochanek;M. Fraser;S. Adams;T. Sukhbold;J. Prieto;T. Muller;G. Bock;J. Brown;S. Dong
DOI：
10.3847/1538-4357/aaa014
发表时间：
2017-11
期刊：
The Astrophysical Journal
影响因子：
--
作者：
L. Tartaglia;L. Tartaglia;D. Sand;S. Valenti;S. Wyatt;Joseph P. Anderson;I. Arcavi;I. Arcavi;C. Ashall;M. Botticella;R. Cartier;T. W. Chen;A. Cikota;D. Coulter;M. Valle;R. Foley;A. Gal-yam;L. Galbany;C. Gall;J. Haislip;J. Harmanen;G. Hosseinzadeh;G. Hosseinzadeh;D. Howell;D. Howell;E. Hsiao;C. Inserra;S. Jha;E. Kankare;C. Kilpatrick;V. Kouprianov;H. Kuncarayakti;T. Maccarone;K. Maguire;S. Mattila;P. Mazzali;C. McCully;C. McCully;A. Melandri;N. Morrell;M. Phillips;G. Pignata;A. Piro;S. Prentice;D. Reichart;C. Rojas-Bravo;S. Smartt;K. Smith;J. Sollerman;M. Stritzinger;M. Sullivan;F. Taddia;D. Young
通讯作者：
L. Tartaglia;L. Tartaglia;D. Sand;S. Valenti;S. Wyatt;Joseph P. Anderson;I. Arcavi;I. Arcavi;C. Ashall;M. Botticella;R. Cartier;T. W. Chen;A. Cikota;D. Coulter;M. Valle;R. Foley;A. Gal-yam;L. Galbany;C. Gall;J. Haislip;J. Harmanen;G. Hosseinzadeh;G. Hosseinzadeh;D. Howell;D. Howell;E. Hsiao;C. Inserra;S. Jha;E. Kankare;C. Kilpatrick;V. Kouprianov;H. Kuncarayakti;T. Maccarone;K. Maguire;S. Mattila;P. Mazzali;C. McCully;C. McCully;A. Melandri;N. Morrell;M. Phillips;G. Pignata;A. Piro;S. Prentice;D. Reichart;C. Rojas-Bravo;S. Smartt;K. Smith;J. Sollerman;M. Stritzinger;M. Sullivan;F. Taddia;D. Young
DOI：
10.3847/1538-4357/aa6251
发表时间：
2016-10
期刊：
The Astrophysical Journal
影响因子：
--
作者：
V. Morozova;A. Piro;S. Valenti
通讯作者：
V. Morozova;A. Piro;S. Valenti