Unprecedented Early Flux Excess in the Hybrid 02es-like Type Ia Supernova 2022ywc Indicates Interaction with Circumstellar Material

Autor: Shubham Srivastav, T. Moore, M. Nicholl, M. R. Magee, S. J. Smartt, M. D. Fulton, S. A. Sim, J. M. Pollin, L. Galbany, C. Inserra, A. Kozyreva, Takashi J. Moriya, F. P. Callan, X. Sheng, K. W. Smith, J. S. Sommer, J. P. Anderson, M. Deckers, M. Gromadzki, T. E. Müller-Bravo, G. Pignata, A. Rest, D. R. Young

Publikováno v: The Astrophysical Journal Letters, Vol 956, Iss 2, p L34 (2023)

We present optical photometric and spectroscopic observations of the 02es-like type Ia supernova (SN) 2022ywc. The transient occurred in the outskirts of an elliptical host galaxy and showed a striking double-peaked light curve with an early excess f

Externí odkaz: https://doaj.org/article/fc0161952c554de3a5563511b4151686

AT 2022aedm and a New Class of Luminous, Fast-cooling Transients in Elliptical Galaxies

Autor: M. Nicholl, S. Srivastav, M. D. Fulton, S. Gomez, M. E. Huber, S. R. Oates, P. Ramsden, L. Rhodes, S. J. Smartt, K. W. Smith, A. Aamer, J. P. Anderson, F. E. Bauer, E. Berger, T. de Boer, K. C. Chambers, P. Charalampopoulos, T.-W. Chen, R. P. Fender, M. Fraser, H. Gao, D. A. Green, L. Galbany, B. P. Gompertz, M. Gromadzki, C. P. Gutiérrez, D. A. Howell, C. Inserra, P. G. Jonker, M. Kopsacheili, T. B. Lowe, E. A. Magnier, C. McCully, S. L. McGee, T. Moore, T. E. Müller-Bravo, M. Newsome, E. Padilla Gonzalez, C. Pellegrino, T. Pessi, M. Pursiainen, A. Rest, E. J. Ridley, B. J. Shappee, X. Sheng, G. P. Smith, G. Terreran, M. A. Tucker, J. Vinkó, R. J. Wainscoat, P. Wiseman, D. R. Young

Publikováno v: The Astrophysical Journal Letters, Vol 954, Iss 1, p L28 (2023)

We present the discovery and extensive follow-up of a remarkable fast-evolving optical transient, AT 2022aedm, detected by the Asteroid Terrestrial impact Last Alert Survey (ATLAS). In the ATLAS o band, AT 2022aedm exhibited a rise time of 9 ± 1 day

Externí odkaz: https://doaj.org/article/9e536d8b3d6e4799b622d317b29c44e2

Photometric study of the late-time near-infrared plateau in Type Ia supernovae

Autor: M Deckers, O Graur, K Maguire, L Shingles, S J Brennan, J P Anderson, J Burke, T-W Chen, L Galbany, M J P Grayling, C P Gutiérrez, L Harvey, D Hiramatsu, D A Howell, C Inserra, T Killestein, C McCully, T E Müller-Bravo, M Nicholl, M Newsome, E Padilla Gonzalez, C Pellegrino, G Terreran, J H Terwel, M Toy, D R Young

Publikováno v: Deckers, M, Graur, O, Maguire, K, Shingles, L, Brennan, S J, Anderson, J P, Burke, J, Chen, T-W, Galbany, L, Grayling, M J P, Gutiérrez, C P, Harvey, L, Hiramatsu, D, Howell, D A, Inserra, C, Killestein, T, McCully, C, Müller-Bravo, T E, Nicholl, M, Newsome, M, Gonzalez, E P, Pellegrino, C, Terreran, G, Terwel, J H, Toy, M & Young, D R 2023, ' Photometric study of the late-time near-infrared plateau in Type Ia supernovae ', Monthly Notices of the Royal Astronomical Society, vol. 521, no. 3, pp. 4414–4430 . https://doi.org/10.1093/mnras/stad841

We present an in-depth study of the late-time near-infrared plateau in Type Ia supernovae (SNe Ia), which occurs between 70-500 d. We double the existing sample of SNe Ia observed during the late-time near-infrared plateau with new observations taken

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a98b23e22df9774ebb8541a918c016c5
http://arxiv.org/abs/2303.09548

Photometry and spectroscopy of the Type Icn supernova 2021ckj: The diverse properties of the ejecta and circumstellar matter of Type Icn SNe

Autor: T. Nagao, H. Kuncarayakti, K. Maeda, T. Moore, A. Pastorello, S. Mattila, K. Uno, S. J. Smartt, S. A. Sim, L. Ferrari, L. Tomasella, J. P. Anderson, T.-W. Chen, L. Galbany, H. Gao, M. Gromadzki, C. P. Gutiérrez, C. Inserra, E. Kankare, E. A. Magnier, T. E. Müller-Bravo, A. Reguitti, D. R. Young

We present photometric and spectroscopic observations of the Type Icn supernova (SN) 2021ckj. Spectral modeling of SN 2021ckj reveals that its composition is dominated by oxygen, carbon and iron group elements, and the photospheric velocity at peak i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48bcd7dd4abd6f1954a7c29ce31c1205

Progenitor, environment, and modelling of the interacting transient AT 2016jbu (Gaia16cfr)

Autor: S J Brennan, M Fraser, J Johansson, A Pastorello, R Kotak, H F Stevance, T -W Chen, J J Eldridge, S Bose, P J Brown, E Callis, R Cartier, M Dennefeld, Subo Dong, P Duffy, N Elias-Rosa, G Hosseinzadeh, E Hsiao, H Kuncarayakti, A Martin-Carrillo, B Monard, G Pignata, D Sand, B J Shappee, S J Smartt, B E Tucker, L Wyrzykowski, H Abbot, S Benetti, J Bento, S Blondin, Ping Chen, A Delgado, L Galbany, M Gromadzki, C P Gutiérrez, L Hanlon, D L Harrison, D Hiramatsu, S T Hodgkin, T W -S Holoien, D A Howell, C Inserra, E Kankare, S Kozłowski, T E Müller-Bravo, K Maguire, C McCully, P Meintjes, N Morrell, M Nicholl, D O’Neill, P Pietrukowicz, R Poleski, J L Prieto, A Rau, D E Reichart, T Schweyer, M Shahbandeh, J Skowron, J Sollerman, I Soszyński, M D Stritzinger, M Szymański, L Tartaglia, A Udalski, K Ulaczyk, D R Young, M van Leeuwen, B van Soelen

Publikováno v: Brennan, S J, Fraser, M, Johansson, J, Pastorello, A, Kotak, R, Stevance, H F, Chen, T-W, Eldridge, J J, Bose, S, Brown, P J, Callis, E, Cartier, R, Dennefeld, M, Dong, S, Duffy, P, Elias-Rosa, N, Hosseinzadeh, G, Hsiao, E, Kuncarayakti, H, Martin-Carrillo, A, Monard, B, Pignata, G, Sand, D, Shappee, B J, Smartt, S J, Tucker, B E, Wyrzykowski, L, Abbot, H, Benetti, S, Bento, J, Blondin, S, Chen, P, Delgado, A, Galbany, L, Gromadzki, M, Gutiérrez, C P, Hanlon, L, Harrison, D L, Hiramatsu, D, Hodgkin, S T, Holoien, T W-S, Howell, D A, Inserra, C, Kankare, E, Kozłowski, S, Müller-Bravo, T E, Maguire, K, McCully, C, Meintjes, P, Morrell, N, Nicholl, M, O’Neill, D, Pietrukowicz, P, Poleski, R, Prieto, J L, Rau, A, Reichart, D E, Schweyer, T, Shahbandeh, M, Skowron, J, Sollerman, J, Soszyński, I, Stritzinger, M D, Szymański, M, Tartaglia, L, Udalski, A, Ulaczyk, K, Young, D R, van Leeuwen, M & van Soelen, B 2022, ' Progenitor, environment, and modelling of the interacting transient AT 2016jbu (Gaia16cfr) ', Monthly Notices of the Royal Astronomical Society, vol. 513, no. 4, pp. 5666–5685 . https://doi.org/10.1093/mnras/stac1228
Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2022, 513 (4), pp.5666-5685. ⟨10.1093/mnras/stac1228⟩
Brennan, S J, Fraser, M, Johansson, J, Pastorello, A, Kotak, R, Stevance, H F, Chen, T W, Eldridge, J J, Bose, S, Brown, P J, Callis, E, Cartier, R, Dennefeld, M, Dong, S, Duffy, P, Elias-Rosa, N, Hosseinzadeh, G, Hsiao, E, Kuncarayakti, H, Martin-Carrillo, A, Monard, B, Pignata, G, Sand, D, Shappee, B J, Smartt, S J, Tucker, B E, Wyrzykowski, L, Abbot, H, Benetti, S, Bento, J, Blondin, S, Chen, P, Delgado, A, Galbany, L, Gromadzki, M, Gutierrez, C P, Hanlon, L, Harrison, D L, Hiramatsu, D, Hodgkin, S T, Holoien, T W S, Howell, D A, Inserra, C, Kankare, E, Kozłowski, S, Müller-Bravo, T E, Maguire, K, Mccully, C, Meintjes, P, Morrell, N, Nicholl, M, O'neill, D, Pietrukowicz, P, Poleski, R, Prieto, J L, Rau, A, Reichart, D E, Schweyer, T, Shahbandeh, M, Skowron, J, Sollerman, J, Soszyński, I, Stritzinger, M D, Szymański, M, Tartaglia, L, Udalski, A, Ulaczyk, K, Young, D R, Van Leeuwen, M & Van Soelen, B 2022, ' Progenitor, environment, and modelling of the interacting transient AT 2016jbu (Gaia16cfr) ', Monthly Notices of the Royal Astronomical Society, vol. 513, no. 4, pp. 5666-5685 . https://doi.org/10.1093/mnras/stac1228

S. J. Brennan et al.
We present the bolometric light curve, identification and analysis of the progenitor candidate, and preliminary modelling of AT 2016jbu (Gaia16cfr). We find a progenitor consistent with a ∼ 22–25 M⊙ yellow hypergiant s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3901cc98eacbacd0a318c26993821a2
https://orca.cardiff.ac.uk/id/eprint/152152/1/Published.pdf