Related papers: Massive stars exploding in a He-rich circumstellar…

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

Massive stars exploding in a He-rich circumstellar medium - IX. SN 2014av, and characterization of Type Ibn SNe

We present spectroscopic and photometric data of the Type Ibn supernova (SN) 2014av, discovered by the Xingming Observatory Sky Survey. Stringent pre-discovery detection limits indicate that the object was detected for the first time about…

Solar and Stellar Astrophysics · Physics 2015-12-23 A. Pastorello , X. -F. Wang , F. Ciabattari , D. Bersier , P. A. Mazzali , X. Gao , Z. Xu , J. -J. Zhang , S. Tokuoka , S. Benetti , E. Cappellaro , N. Elias-Rosa , A. Harutyunyan , F. Huang , M. Miluzio , J. Mo , P. Ochner , L. Tartaglia , G. Terreran , L. Tomasella , M. Turatto

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

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

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

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

Helium stars exploding in circumstellar material and the origin of Type Ibn supernovae

Type Ibn supernovae (SNe) are a mysterious class of transients whose spectra exhibit persistently narrow HeI lines, and whose bolometric light curves are typically fast evolving and overluminous at peak relative to standard Type Ibc SNe. We…

Solar and Stellar Astrophysics · Physics 2022-03-14 Luc Dessart , John Hillier , Hanindyo Kuncarayakti

Massive stars exploding in a He-rich circumstellar medium XII. SN 2024acyl: A fast, linearly declining Type Ibn supernova with early flash-ionisation features

We present a photometric and spectroscopic analysis of the Type Ibn supernova (SN) 2024acyl. It rises to an absolute magnitude peak of about -17.58 mag in 10.6 days, and displays a rapid linear post-peak light-curve decline in all bands,…

Solar and Stellar Astrophysics · Physics 2026-03-04 Y. -Z. Cai , A. Pastorello , K. Maeda , J. -W. Zhao , Z. -Y. Wang , Z. -H. Peng , A. Reguitti , L. Tartaglia , A. V. Filippenko , Y. Pan , G. Valerin , B. Kumar , Z. Wang , M. Fraser , J. P. Anderson , S. Benetti , S. Bose , T. G. Brink , E. Cappellaro , T. -W. Chen , X. -L. Chen , N. Elias-Rosa , A. Esamdin , A. Gal-Yam , M. González-Bañuelos , M. Gromadzki , C. P. Gutiérrez , A. Iskandar , C. Inserra , T. Kangas , E. Kankare , T. Kravtsov , H. Kuncarayakti , L. -P. Li , C. -X. Liu , X. -K. Liu , P. Lundqvist , K. Matilainen , S. Mattila , S. Moran , T. E. Müller-Bravo , T. Nagao , T. Petrushevska , G. Pignata , I. Salmaso , S. J. Smartt , J. Sollerman , M. D. Stritzinger , S. Srivastav , L. -T. Wang , S. -Y. Yan , Y. Yang , Y. -P. Yang , W. Zheng , X. -Z. Zou , L. -Y. Chen , X. -L. Du , Q. -L. Fang , A. Fiore , F. Ragosta , S. Zha , J. -J. Zhang , X. -W. Liu , J. -M. Bai , B. Wang , X. -F. Wang

Massive stars exploding in a He-rich circumstellar medium. I. Type Ibn (SN 2006jc-like) events

We present new spectroscopic and photometric data of the type Ibn supernovae 2006jc, 2000er and 2002ao. We discuss the general properties of this recently proposed supernova family, which also includes SN 1999cq. The early-time monitoring…

Astrophysics · Physics 2009-11-13 A. Pastorello , S. Mattila , L. Zampieri , M. Della Valle , S. J. Smartt , S. Valenti , I. Agnoletto , S. Benetti , C. R. Benn , D. Branch , E. Cappellaro , M. Dennefeld , J. J. Eldridge , A. Gal-Yam , A. Harutyunyan , I. Hunter , H. Kjeldsen , Y. Lipkin , P. A. Mazzali , P. Milne , H. Navasardyan , E. O. Ofek , E. Pian , O. Shemmer , S. Spiro , R. A. Stathakis , S. Taubenberger , M. Turatto , H. Yamaoka

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

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

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

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

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

Origins of Type Ibn SNe 2006jc/2015G in interacting binaries and implications for pre-SN eruptions

Type Ibn supernovae (SNe Ibn) are intriguing stellar explosions whose spectra exhibit narrow helium lines with little hydrogen. They trace the presence of circumstellar material (CSM) formed via pre-SN eruptions of their stripped-envelope…

Solar and Stellar Astrophysics · Physics 2020-01-08 Ning-Chen Sun , Jusytn R. Maund , Ryosuke Hirai , Paul A. Crowther , Philipp Podsiadlowski

ASASSN-14ms:the Most Energetic Known Explosion of a Type Ibn Supernova and its Physical Origin

ASASSN-14ms may represent the most luminous Type Ibn supernova (SN~Ibn) ever detected, with an absolute U-band magnitude brighter than -22.0 mag and a total bolometric luminosity >1.0x10^{44} erg/s near maximum light. The early-time spectra…

High Energy Astrophysical Phenomena · Physics 2021-09-08 Xiaofeng Wang , Weili Lin , Jujia Zhang , Tianmeng Zhang , Yongzhi Cai , Kaicheng Zhang , Alexei V. Filippenko , Melissa Graham , Keiichi Maeda , Jun Mo , Danfeng Xiang , Gaobo Xi , Shengyu Yan , Lifan Wang , Lingjun Wang , Koji Kawabata , Qian Zhai

Massive stars exploding in a He-rich circumstellar medium - VIII. PSN J07285387+3349106, a highly reddened supernova Ibn

We present spectroscopic and photometric observations for the Type Ibn supernova (SN) dubbed PSN J07285387+3349106. Using data provided by amateur astronomers, we monitored the photometric rise of the SN to maximum light, occurred on 2015…

Solar and Stellar Astrophysics · Physics 2015-11-04 A. Pastorello , L. Tartaglia , N. Elias-Rosa , A. Morales-Garoffolo , G. Terreran , S. Taubenberger , U. M. Noebauer , S. Benetti , E. Cappellaro , F. Ciabattari , M. Dennefeld , A. Dimai , E. E. O. Ishida , A. Harutyunyan , S. Leonini , P. Ochner , J. Sollerman , F. Taddia , S. Zaggia

Spectrum formation in Superluminous Supernovae (Type I)

The near-maximum spectra of most superluminous supernovae that are not dominated by interaction with a H-rich CSM (SLSN-I) are characterised by a blue spectral peak and a series of absorption lines which have been identified as OII.…

High Energy Astrophysical Phenomena · Physics 2019-08-14 P. A. Mazzali , M. Sullivan , E. Pian , J. Greiner , D. A. Kann

SN 2006jc: A Wolf-Rayet Star Exploding in a Dense He-Rich Circumstellar Medium

We present optical photometry and spectra of the peculiar Type Ib supernova (SN) 2006jc. Strong and relatively narrow He I emission lines indicate the progenitor star exploded inside a dense circumstellar medium (CSM) rich in He. An…

Astrophysics · Physics 2009-01-19 Ryan J. Foley , Nathan Smith , Mohan Ganeshalingam , Weidong Li , Ryan Chornock , Alexei V. Filippenko

Evolution of A Peculiar Type Ibn Supernova SN 2019wep

We present a high-cadence short term photometric and spectroscopic monitoring campaign of a type Ibn SN 2019wep, which is one of the rare SN Ibn after SNe 2010al and 2019uo to display signatures of flash ionization (\ion{He}{2}, \ion{C}{3},…

High Energy Astrophysical Phenomena · Physics 2022-05-18 Anjasha Gangopadhyay , Kuntal Misra , Griffin Hosseinzadeh , Iair Arcavi , Craig Pellegrino , Xiaofeng Wang , D. Andrew Howell , Jamison Burke , Jujia Zhang , Koji Kawabata , Mridweeka Singh , Raya Dastidar , Daichi Hiramatsu , Curtis McCully , Jun Mo , Zhihao Chen , Danfeng Xiang