Related papers: Evolution of A Peculiar Type Ibn Supernova SN 2019…

Flash ionization signatures in the type Ibn supernova SN 2019uo

We present photometric and spectroscopic observations of the type Ibn supernova (SN) 2019uo, the second ever SN Ibn with flash ionization (He II, C III, N III) features in its early spectra. SN 2019uo displays a rapid post-peak luminosity…

High Energy Astrophysical Phenomena · Physics 2020-02-12 Anjasha Gangopadhyay , Kuntal Misra , Daichi Hiramatsu , Shan-Qin Wang , Griffin Hosseinzadeh , Xiaofeng Wang , Stefano Valenti , Jujia Zhang , D. Andrew Howell , Iair Arcavi , G. C. Anupama , Jamison Burke , Raya Dastidar , Koichi Itagaki , Brajesh Kumar , Brijesh Kumar , Long Li , Curtis McCully , Jun Mo , Shashi Bhushan Pandey , Craig Pellegrino , Hanna Sai , D. K. Sahu , Pankaj Sanwal , Avinash Singh , Mridweeka Singh , Jicheng Zhang , Tianmeng Zhang , Xinhan Zhang

SN 2024abvb: a Type Ibn/Icn supernova with evidence of helium and an extreme offset from its host galaxy

We present spectroscopic and photometric observations and analysis of SN 2024abvb, a peculiar transitional Type Ibn/Icn supernova located at an unusually large projected distance from its host galaxy (21.5 kpc). SN 2024abvb displays an…

Solar and Stellar Astrophysics · Physics 2026-02-25 Callum Aster , Cosimo Inserra , Andrea Pastorello , Joseph P Anderson , Franz Erik Bauer , K. Azalee Bostroem , Kenneth C. Chambers , Ting-Wan Chen , Joseph R. Farah , Morgan Fraser , Dino Pierluigi Fugazza , Mariusz Gromadzki , Claudia P. Gutiérrez , D. Andrew Howell , Erkki Kankare , Tom L. Killestein , Niilo Koivisto , Giorgos Leloudas , J. D. Lyman , Kyle Medler , Shane Moran , Tomás E. Müller-Bravo , Giuliano Pignata , Miika Pursiainen , Fabio Ragosta , Andrea Reguitti , Jesper Sollerman , Giorgio Valerin , Ben Warwick , David R. Young

SN 2023emq: a flash-ionised Ibn supernova with possible CIII emissio

SN 2023emq is a fast-evolving transient initially classified as a rare Type Icn supernova (SN), interacting with a H- and He-free circumstellar medium (CSM) around maximum light. Subsequent spectroscopy revealed the unambiguous emergence of…

High Energy Astrophysical Phenomena · Physics 2023-11-28 M. Pursiainen , G. Leloudas , S. Schulze , P. Charalampopoulos , C. R. Angus , J. P. Anderson , F. Bauer , T. -W. Chen , L. Galbany , M. Gromadzki , C. P. Gutiérrez , C. Inserra , J. Lyman , T. E. Müller-Bravo , M. Nicholl , S. J. Smartt , L. Tartaglia , P. Wiseman , D. R. Young

The luminous and rapidly evolving SN 2018bcc: Clues toward the origin of Type Ibn SNe from the Zwicky Transient Facility

Supernovae (SNe) Type Ibn are rapidly evolving and bright (M$_\text{R,peak}$ $\sim-19$) transients interacting with He-rich circumstellar material (CSM). SN 2018bcc, detected by the ZTF shortly after explosion, provides the best constraints…

High Energy Astrophysical Phenomena · Physics 2021-06-09 E. Karamehmetoglu , C. Fransson , J. Sollerman , L. Tartaglia , F. Taddia , K. De , C. Fremling , A. Bagdasaryan , C. Barbarino , E. C. Bellm , R. Dekany , A. M. Dugas , M. Giomi , A. Goobar , M. Graham , A. Ho , R. R. Laher , F. J. Masci , J. D. Neill , D. Perley , R. Riddle , B. Rusholme , M. T. Soumagnac

Massive stars exploding in a He-rich circumstellar medium. XI. Diverse evolution of five Ibn SNe 2020nxt, 2020taz, 2021bbv, 2023utc and 2024aej

We present the photometric and spectroscopic analysis of five Type Ibn supernovae (SNe): SN 2020nxt, SN 2020taz, SN 2021bbv, SN 2023utc, and SN 2024aej. These events share key observational features and belong to a family of objects similar…

High Energy Astrophysical Phenomena · Physics 2025-08-27 Z. -Y. Wang , A. Pastorello , Y. -Z. Cai , M. Fraser , A. Reguitti , W. -L. Lin , L. Tartaglia , D. Andrew Howell , S. Benetti , E. Cappellaro , Z. -H. Chen , N. Elias-Rosa , J. Farah , A. Fiore , D. Hiramatsu , E. Kankare , Z. -T. Li , P. Lundqvist , P. A. Mazzali , C. McCully , J. Mo , S. Moran , M. Newsome , E. Padilla Gonzalez , C. Pellegrino , Z. -H. Peng , S. J. Smartt , S. Srivastav , M. D. Stritzinger , G. Terreran , L. Tomasella , G. Valerin , G. -J. Wang , X. -F. Wang , T. de Boer , K. C. Chambers , H. Gao , F. -Z. Guo , C. P. Guti'errez , T. Kangas , E. Karamehmetoglu , G. -C. Li , C. -C. Lin , T. B. Lowe , X. -R. Ma , E. A. Magnier , P. Minguez , S. -P. Pei , T. M. Reynolds , R. J. Wainscoat , B. Wang , S. Williams , C. -Y. Wu , J. -J. Zhang , X. -H. Zhang , X. -J. Zhu

Massive stars exploding in a He-rich circumstellar medium $-$ X. Flash spectral features in the Type Ibn SN 2019cj and observations of SN 2018jmt

We present optical and near-infrared observations of two Type Ibn supernovae (SNe), SN 2018jmt and SN 2019cj. Their light curves have rise times of about 10 days, reaching an absolute peak magnitude of $M_g$(SN 2018jmt) = $-$19.07 $\pm$…

High Energy Astrophysical Phenomena · Physics 2024-11-13 Z. -Y. Wang , A. Pastorello , K. Maeda , A. Reguitti , Y. -Z. Cai , D. Andrew Howell , S. Benetti , D. Buckley , E. Cappellaro , R. Carini , R. Cartier , T. -W. Chen , N. Elias-Rosa , Q. -L. Fang , A. Gal-Yam , A. Gangopadhyay , M. Gromadzki , W. -P. Gan , D. Hiramatsu , M. -K. Hu , C. Inserra , C. McCully , M. Nicholl , F. E. Olivares , G. Pignata , J. Pineda-Garc'ia , M. Pursiainen , F. Ragosta , A. Rau , R. Roy , J. Sollerman , L. Tartaglia , G. Terreran , G. Valerin , Q. Wang , S. -Q. Wang , D. R. Young , A. Aryan , M. Bronikowski , E. Concepcion , L. Galbany , H. Lin , A. Melandri , T. Petrushevska , M. Ramirez , D. -D Shi , B. Warwick , J. -J. Zhang , B. Wang , X. -F. Wang , X. -J. Zhu

Characterization of type Ibn SNe

Type Ibn supernovae (SNe) are characterized by narrow helium (He I) lines from photons produced by the unshocked circumstellar material (CSM). About 80 SNe Ibn have been discovered to date, and only a handful have extensive observational…

High Energy Astrophysical Phenomena · Physics 2026-04-15 D. Farias , C. Gall , V. A. Villar , K. Auchettl , K. M. de Soto , A. Gagliano , W. B. Hoogendam , G. Narayan , A. Sedgewick , S. K. Yadavalli , Y. Zenati , C. R. Angus , K. W. Davis , J. Hjorth , W. V. Jacobson-Galán , D. O. Jones , C. D. Kilpatrick , M. J. Bustamante Rosell , D. A. Coulter , G. Dimitriadis , R. J. Foley , A. Gangopadhyay , H. Gao , M. E. Huber , L. Izzo , J. L. Johnson , A. L. Piro , A. Rest , C. Rojas-Bravo , M. R. Siebert , K. Taggart , S. Tinyanont

Massive stars exploding in a He-rich circumstellar medium - VII. The metamorphosis of ASASSN-15ed from a narrow line Type Ibn to a normal Type Ib Supernova

We present the results of the spectroscopic and photometric monitoring campaign of ASASSN-15ed. The transient was discovered quite young by the All Sky Automated Survey for SuperNovae (ASAS-SN). Amateur astronomers allowed us to sample the…

Solar and Stellar Astrophysics · Physics 2015-10-01 A. Pastorello , J. L. Prieto , N. Elias-Rosa , D. Bersier , G. Hosseinzadeh , A. Morales-Garoffolo , U. M. Noebauer , S. Taubenberger , L. Tomasella , C. S. Kochanek , E. Falco , U. Basu , J. F. Beacom , S. Benetti , J. Brimacombe , E. Cappellaro , A. B. Danilet , Subo Dong , J. M. Fernandez , N. Goss , V. Granata , A. Harutyunyan , T. W. -S. Holoien , E. E. O. Ishida , S. Kiyota , G. Krannich , B. Nicholls , P. Ochner , G. Pojmanski , B. J. Shappee , G. V. Simonian , K. Z. Stanek , S. Starrfield , D. Szczygiel , L. Tartaglia , G. Terreran , T. A. Thompson , M. Turatto , R. M. Wagner , W. S. Wiethoff , A. Wilber , P. R. Wozniak

SN 2020bqj: a Type Ibn supernova with a long lasting peak plateau

Context: Type Ibn supernovae are a rare class of stripped envelope supernovae interacting with a helium-rich CSM. The majority of the SNe Ibn reported display a surprising homogeneity in their fast lightcurves and starforming hosts. Aims:…

High Energy Astrophysical Phenomena · Physics 2021-08-25 E. C. Kool , E. Karamehmetoglu , J. Sollerman , S. Schulze , R. Lunnan , T. M. Reynolds , C. Barbarino , E. C. Bellm , K. De , D. A. Duev , C. Fremling , V. Z. Golkhou , M. L. Graham , D. A. Green , A. Horesh , S. Kaye , Y. -L. Kim , R. R. Laher , F. J. Masci , J. Nordin , D. A. Perley , E. S. Phinney , M. Porter , D. Reiley , H. Rodriguez , J. van Roestel , B. Rusholme , Y. Sharma , I. Sfaradi , M. T. Soumagnac , K. Taggart , L. Tartaglia , D. R. A. Williams , L. Yan

SN 2011hw: Helium-Rich Circumstellar Gas and the Luminous Blue Variable to Wolf-Rayet Transition in Supernova Progenitors

We present optical photometry and spectroscopy of the peculiar Type IIn/Ibn supernova SN2011hw. Its light curve exhibits a slower decline rate than normal SNeIbc, with a peak absolute magnitude of -19.5 (unfiltered) and a secondary peak of…

Solar and Stellar Astrophysics · Physics 2015-06-04 Nathan Smith , Jon C. Mauerhan , Jeffrey M. Silverman , Mohan Ganeshalingam , Alexei V. Filippenko , S. Bradley Cenko , Kelsey I. Clubb , Michael Kandrashoff

A global look into the world of interacting supernovae

Interacting supernovae (SNe) IIn and Ibn show narrow emission lines and have always been a mysterious and unsolved genre in SNe physics. We present a comprehensive analysis of the temporal and spectroscopic behaviour of a group of…

High Energy Astrophysical Phenomena · Physics 2022-08-31 Anjasha Gangopadhyay , Kuntal Misra , Koji Kawabata , Raya Dastidar , Mridweeka Singh

Type Ibn Supernovae Show Photometric Homogeneity and Spectral Diversity at Maximum Light

Type Ibn supernovae (SNe) are a small yet intriguing class of explosions whose spectra are characterized by low-velocity helium emission lines with little to no evidence for hydrogen. The prevailing theory has been that these are the…

High Energy Astrophysical Phenomena · Physics 2019-01-24 Griffin Hosseinzadeh , Iair Arcavi , Stefano Valenti , Curtis McCully , D. Andrew Howell , Joel Johansson , Jesper Sollerman , Andrea Pastorello , Stefano Benetti , Yi Cao , S. Bradley Cenko , Kelsey Clubb , Alessandra Corsi , Gina Duggan , Nancy Elias-Rosa , Alexei V. Filippenko , Ori D. Fox , Christoffer Fremling , Assaf Horesh , Emir Karamehmetoglu , Mansi Kasliwal , G. H. Marion , Eran Ofek , David Sand , Francesco Taddia , WeiKang Zheng , Morgan Fraser , Avishay Gal-Yam , Cosimo Inserra , Russ Laher , Frank Masci , Umaa Rebbapragada , Stephen Smartt , Ken W. Smith , Mark Sullivan , Jason Surace , Przemek Woźniak

Massive stars exploding in a He-rich circumstellar medium. V. Observations of the slow-evolving SN Ibn OGLE-2012-SN-006

We present optical observations of the peculiar Type Ibn supernova (SN Ibn) OGLE-2012-SN-006, discovered and monitored by the OGLE-IV survey, and spectroscopically followed by PESSTO at late phases. Stringent pre-discovery limits constrain…

Solar and Stellar Astrophysics · Physics 2015-06-23 A. Pastorello , L. Wyrzykowski , S. Valenti , J. L. Prieto , S. Kozlowski , A. Udalski , N. Elias-Rosa , A. Morales-Garoffolo , J. P. Anderson , S. Benetti , M. Bersten , M. T. Botticella , E. Cappellaro , G. Fasano , M. Fraser , A. Gal-Yam , M. Gillone , M. L. Graham , J. Greiner , S. Hachinger , D. A. Howell , C. Inserra , J. Parrent , A. Rau , S. Schulze , S. J. Smartt , K. W. Smith , M. Turatto , O. Yaron , D. R. Young , M. Kubiak , M. K. Szymanski , G. Pietrzynski , I. Soszynski , K. Ulaczyk , R. Poleski , P. Pietrukowicz , J. Skowron , P. Mroz

SN 2021foa, a transitional event between a Type IIn (SN 2009ip-like) and a Type Ibn supernova

We present photometric and spectroscopic data of the unusual interacting supernova (SN) 2021foa. It rose to an absolute magnitude peak of $M_r=-18$ mag in 20 days. The initial light curve decline shows some luminosity fluctuations before a…

Solar and Stellar Astrophysics · Physics 2022-06-29 A. Reguitti , A. Pastorello , G. Pignata , M. Fraser , M. D. Stritzinger , S. J. Brennan , Y. -Z. Cai , N. Elias-Rosa , D. Fugazza , C. P. Gutierrez , E. Kankare , R. Kotak , P. Lundqvist , P. A. Mazzali , S. Moran , I. Salmaso , L. Tomasella , G. Valerin , H. Kuncarayakti

Massive stars exploding in a He-rich circumstellar medium. IV. Transitional Type Ibn Supernovae

We present ultraviolet, optical and near-infrared data of the Type Ibn supernovae (SNe) 2010al and 2011hw. SN 2010al reaches an absolute magnitude at peak of M(R) = -18.86 +- 0.21. Its early light curve shows similarities with normal SNe…

Solar and Stellar Astrophysics · Physics 2015-06-23 A. Pastorello , S. Benetti , P. J. Brown , D. Y. Tsvetkov , C. Inserra , S. Taubenberger , L. Tomasella , M. Fraser , D. J. Rich , M. T. Botticella , F. Bufano , E. Cappellaro , M. Ergon , E. S. Gorbovskoy , A. Harutyunyan , F. Huang , R. Kotak , V. M. Lipunov , L. Magill , M. Miluzio , N. Morrell , P. Ochner , S. J. Smartt , J. Sollerman , S. Spiro , M. D. Stritzinger , M. Turatto , S. Valenti , X. Wang , D. E. Wright , V. V. Yurkov , L. Zampieri , T. Zhang

Massive stars exploding in a He-rich circumstellar medium. VI. Observations of two distant Type Ibn supernova candidates discovered by La Silla-QUEST

We present optical observations of the peculiar stripped-envelope supernovae (SNe) LSQ12btw and LSQ13ccw discovered by the La Silla-QUEST survey. LSQ12btw reaches an absolute peak magnitude of M(g) = -19.3 +- 0.2, and shows an asymmetric…

Solar and Stellar Astrophysics · Physics 2015-06-23 A. Pastorello , E. Hadjiyska , D. Rabinowitz , S. Valenti , M. Turatto , G. Fasano , S. Benitez-Herrera , C. Baltay , S. Benetti , M. T. Botticella , E. Cappellaro , N. Elias-Rosa , N. Ellman , U. Feindt , A. V. Filippenko , M. Fraser , A. Gal-Yam , M. L. Graham , D. A. Howell , C. Inserra , P. L. Kelly , R. Kotak , M. Kowalski , R. McKinnon , A. Morales-Garoffolo , P. E. Nugent , S. J. Smartt , K. W. Smith , M. D. Stritzinger , M. Sullivan , S. Taubenberger , E. S. Walker , O. Yaron , D. R. Young

The transitional Type Ibn/IIn SN 2022pda, with pre-explosion outbursts and a double-peaked light curve

We report the results of a photometric and spectroscopic follow-up campaign of the unusual interacting supernova (SN) 2022pda. Precursor variability lasting $\sim 100$ days is observed before the explosion. The SN light curve has a double…

High Energy Astrophysical Phenomena · Physics 2026-05-26 Y. -Z. Cai , A. Pastorello , R. Chiba , T. J. Moriya , A. Reguitti , L. Tartaglia , S. Moran , S. Campana , Z. -Y. Wang , J. -W. Zhao , J. P. Anderson , S. Benetti , S. J. Brennan , E. Cappellaro , K. C. Chambers , T. -W. Chen , Z. -H. Chen , T. de Boer , Y. -Z. Dong , J. Duarte , N. Elias-Rosa , M. Fraser , W. -P. Gan , H. Gao , M. Gromadzki , G. Hosseinzadeh , D. A. Howell , C. Inserra , T. Kangas , E. Kankare , T. Kravtsov , L. -P. Li , C. -C. Lin , T. B. Lowe , P. Lundqvist , E. A. Magnier , K. Matilainen , P. A. Mazzali , C. McCully , P. Minguez , T. E. Müller-Bravo , M. Newsome , E. Padilla Gonzalez , C. Pellegrino , P. J. Pessi , T. Petrushevska , G. Pignata , R. P. Santos , S. Schulze , S. J. Smartt , I. A. Smith , K. W. Smith , J. Sollerman , S. Srivastav , M. D. Stritzinger , G. Terreran , G. Valerin , R. Wainscoat , S. -Q. Wang , D. R. Young , L. Galbany , Z. Li , I. Salmaso , S. Zha , J. -M. Bai , B. Wang , X. -F. Wang , J. -J. Zhang

The Type Ibn Supernova 2019kbj -- Indications for Diversity in Type Ibn Supernova Progenitors

Type Ibn supernovae (SNe) are a rare class of stellar explosions whose progenitor systems are not yet well determined. We present and analyze observations of the Type Ibn SN 2019kbj, and model its light curve in order to constrain its…

High Energy Astrophysical Phenomena · Physics 2023-03-29 Tom Ben-Ami , Iair Arcavi , Megan Newsome , Joseph Farah , Craig Pellegrino , Giacomo Terreran , Jamison Burke , Griffin Hosseinzadeh , Curtis McCully , Daichi Hiramatsu , Estefania Padilla Gonzalez , D. Andrew Howell

The Exotic Type Ic Broad-Lined Supernova SN 2018gep: Blurring the Line Between Supernovae and Fast Optical Transients

In the last decade a number of rapidly evolving transients have been discovered that are not easily explained by traditional supernovae models. We present optical and UV data on onee such object, SN 2018gep, that displayed a fast rise with…

High Energy Astrophysical Phenomena · Physics 2021-08-02 T. A. Pritchard , Katarzyna Bensch , Maryam Modjaz , Marc Williamson , Christina C. Thöne , J. Vinkó , Federica B. Bianco , K. Azalee Boestroem , Jamison Burke , Rubén García-Benito , L. Galbany , Daichi Hiramatsu , D. Andrew Howell , Luca Izzo , D. Alexander Kann , Curtis McCully , Craig Pellegrino , Antonio de Ugarte Postigo , Stefano Valenti , Xiaofeng Wang , J. C. Wheeler , Danfeng Xiang , K. Sárneczky , A. Bódi , B. Cseh , D. Tarczay-Nehéz , L. Kriskovics , A. Ordasi , A. Pál , R. Szakáts , K. Vida

OGLE-2014-SN-131: A long-rising Type Ibn supernova from a massive progenitor

Type Ibn supernovae (SNe Ibn) are thought to be the core-collapse explosions of massive stars whose ejecta interact with He-rich circumstellar material (CSM). We report the discovery of a SN Ibn, with the longest rise-time ever observed,…

High Energy Astrophysical Phenomena · Physics 2017-06-23 E. Karamehmetoglu , F. Taddia , J. Sollerman , Ł. Wyrzykowski , S. Schmidl , M. Fraser , C. Fremling , J. Greiner , C. Inserra , Z. Kostrzewa-Rutkowska , K. Maguire , S. Smartt , M. Sullivan , D. R. Young