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Start Over Author "Gutiérrez, Claudia" Journal monthly notices of the royal astronomical society
12 results on '"Gutiérrez, Claudia"'

1. A Precursor Plateau and Pre-Maximum [O II] Emission in the Superluminous SN2019szu: A Pulsational Pair-Instability Candidate

Author

Aamer, Aysha, primary, Nicholl, Matt, additional, Jerkstrand, Anders, additional, Gomez, Sebastian, additional, Oates, Samantha R, additional, Smartt, Stephen J, additional, Srivastav, Shubham, additional, Leloudas, Giorgos, additional, Anderson, Joseph P, additional, Berger, Edo, additional, de Boer, Thomas, additional, Chambers, Kenneth, additional, Chen, Ting-Wan, additional, Galbany, Lluís, additional, Gao, Hua, additional, Gompertz, Benjamin P, additional, González-Bañuelos, Maider, additional, Gromadzki, Mariusz, additional, Gutiérrez, Claudia P, additional, Inserra, Cosimo, additional, Lowe, Thomas B, additional, Magnier, Eugene A, additional, Mazzali, Paolo A, additional, Moore, Thomas, additional, Müller-Bravo, Tomás E, additional, Pursiainen, Miika, additional, Rest, Armin, additional, Schulze, Steve, additional, Smith, Ken W, additional, Terwel, Jacco H, additional, Wainscoat, Richard, additional, and Young, David R, additional

Published
2023
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2. Detailed spectrophotometric analysis of the superluminous and fast evolving SN 2019neq

Author

Fiore, Achille, primary, Benetti, Stefano, additional, Tartaglia, Leonardo, additional, Jerkstrand, Anders, additional, Salmaso, Irene, additional, Tomasella, Lina, additional, Morales-Garoffolo, Antonia, additional, Geier, Stefan, additional, Elias-Rosa, Nancy, additional, Cappellaro, Enrico, additional, Wang, Xiaofeng, additional, Mo, Jun, additional, Chen, Zhihao, additional, Yan, Shengyu, additional, Pastorello, Andrea, additional, Mazzali, Paolo A, additional, Ciolfi, Riccardo, additional, Cai, Yongzhi, additional, Fraser, Morgan, additional, Gutiérrez, Claudia P, additional, Karamehmetoglu, Emir, additional, Kuncarayakti, Hanindyo, additional, Moran, Shane, additional, Ochner, Paolo, additional, Reguitti, Andrea, additional, Reynolds, Thomas M, additional, and Valerin, Giorgio, additional

Published
2023
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3. A precursor plateau and pre-maximum [O ii] emission in the superluminous SN2019szu: a pulsational pair-instability candidate.

Author

Aamer, Aysha, Nicholl, Matt, Jerkstrand, Anders, Gomez, Sebastian, Oates, Samantha R, Smartt, Stephen J, Srivastav, Shubham, Leloudas, Giorgos, Anderson, Joseph P, Berger, Edo, de Boer, Thomas, Chambers, Kenneth, Chen, Ting-Wan, Galbany, Lluís, Gao, Hua, Gompertz, Benjamin P, González-Bañuelos, Maider, Gromadzki, Mariusz, Gutiérrez, Claudia P, and Inserra, Cosimo

Subjects
TYPE I supernovae, SUPERNOVAE
Abstract

We present a detailed study on SN2019szu, a Type I superluminous supernova at z  = 0.213 that displayed unique photometric and spectroscopic properties. Pan-STARRS and ZTF forced photometry show a pre-explosion plateau lasting ∼40 d. Unlike other SLSNe that show decreasing photospheric temperatures with time, the optical colours show an apparent temperature increase from ∼15 000 to ∼20 000 K over the first 70 d, likely caused by an additional pseudo-continuum in the spectrum. Remarkably, the spectrum displays a forbidden emission line (likely attributed to λλ7320,7330) visible 16 d before maximum light, inconsistent with an apparently compact photosphere. This identification is further strengthened by the appearances of [O  iii ] λλ4959, 5007, and [O  iii ] λ4363 seen in the spectrum. Comparing with nebular spectral models, we find that the oxygen line fluxes and ratios can be reproduced with ∼0.25 M⊙ of oxygen-rich material with a density of |$\sim 10^{-15}\, \rm {g\, cm}^{-3}$|⁠. The low density suggests a circumstellar origin, but the early onset of the emission lines requires that this material was ejected within the final months before the terminal explosion, consistent with the timing of the precursor plateau. Interaction with denser material closer to the explosion likely produced the pseudo-continuum bluewards of ∼5500 Å. We suggest that this event is one of the best candidates to date for a pulsational pair-instability ejection, with early pulses providing the low density material needed for the formation of the forbidden emission line, and collisions between the final shells of ejected material producing the pre-explosion plateau. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Detailed spectrophotometric analysis of the superluminous and fast evolving SN 2019neq.

Author

Fiore, Achille, Benetti, Stefano, Tartaglia, Leonardo, Jerkstrand, Anders, Salmaso, Irene, Tomasella, Lina, Morales-Garoffolo, Antonia, Geier, Stefan, Elias-Rosa, Nancy, Cappellaro, Enrico, Wang, Xiaofeng, Mo, Jun, Chen, Zhihao, Yan, Shengyu, Pastorello, Andrea, Mazzali, Paolo A, Ciolfi, Riccardo, Cai, Yongzhi, Fraser, Morgan, and Gutiérrez, Claudia P

Subjects
MAGNETARS, LIGHT curves, STAR formation, MAGNETIC fields, SUPERNOVAE, DATA analysis
Abstract

SN 2019neq was a very fast evolving superluminous supernova. At a redshift z  = 0.1059, its peak absolute magnitude was −21.5 ± 0.2 mag in g band. In this work, we present data and analysis from an extensive spectrophotometric follow-up campaign using multiple observational facilities. Thanks to a nebular spectrum of SN 2019neq, we investigated some of the properties of the host galaxy at the location of SN 2019neq and found that its metallicity and specific star formation rate are in a good agreement with those usually measured for SLSNe-I hosts. We then discuss the plausibility of the magnetar and the circumstellar interaction scenarios to explain the observed light curves, and interpret a nebular spectrum of SN 2019neq using published sumo radiative-transfer models. The results of our analysis suggest that the spin-down radiation of a millisecond magnetar with a magnetic field |$B\simeq 6\times 10^{14}\, \mathrm{G}$| could boost the luminosity of SN 2019neq. [ABSTRACT FROM AUTHOR]

Published
2024
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5. SN 2021zny: an early flux excess combined with late-time oxygen emission suggests a double white dwarf merger event

Author

Dimitriadis, Georgios, primary, Maguire, Kate, additional, Karambelkar, Viraj R, additional, Lebron, Ryan J, additional, Liu (刘 畅), Chang, additional, Kozyreva, Alexandra, additional, Miller, Adam A, additional, Ridden-Harper, Ryan, additional, Anderson, Joseph P, additional, Chen, Ting-Wan, additional, Coughlin, Michael, additional, Valle, Massimo Della, additional, Drake, Andrew, additional, Galbany, Lluís, additional, Gromadzki, Mariusz, additional, Groom, Steven L, additional, Gutiérrez, Claudia P, additional, Ihanec, Nada, additional, Inserra, Cosimo, additional, Johansson, Joel, additional, Müller-Bravo, Tomás E, additional, Nicholl, Matt, additional, Polin, Abigail, additional, Rusholme, Ben, additional, Schulze, Steve, additional, Sollerman, Jesper, additional, Srivastav, Shubham, additional, Taggart, Kirsty, additional, Wang, Qinan, additional, Yang (杨 轶), Yi, additional, and Young, David R, additional

Published
2023
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7. Real-time discovery of AT2020xnd: a fast, luminous ultraviolet transient with minimal radioactive ejecta

Author

Perley, Daniel A, primary, Ho, Anna Y Q, additional, Yao, Yuhan, additional, Fremling, Christoffer, additional, Anderson, Joseph P, additional, Schulze, Steve, additional, Kumar, Harsh, additional, Anupama, G C, additional, Barway, Sudhanshu, additional, Bellm, Eric C, additional, Bhalerao, Varun, additional, Chen, Ting-Wan, additional, Duev, Dmitry A, additional, Galbany, Lluís, additional, Graham, Matthew J, additional, Gromadzki, Mariusz, additional, Gutiérrez, Claudia P, additional, Ihanec, Nada, additional, Inserra, Cosimo, additional, Kasliwal, Mansi M, additional, Kool, Erik C, additional, Kulkarni, S R, additional, Laher, Russ R, additional, Masci, Frank J, additional, Neill, James D, additional, Nicholl, Matt, additional, Pursiainen, Miika, additional, van Roestel, Joannes, additional, Sharma, Yashvi, additional, Sollerman, Jesper, additional, Walters, Richard, additional, and Wiseman, Philip, additional

Published
2021
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8. SN 2019hcc: a Type II supernova displaying early O ii lines

Author

Parrag, Eleonora, primary, Inserra, Cosimo, additional, Schulze, Steve, additional, Anderson, Joseph, additional, Chen, Ting-Wan, additional, Leloudas, Giorgios, additional, Galbany, Lluis, additional, Gutiérrez, Claudia P, additional, Hiramatsu, Daichi, additional, Kankare, Erkki, additional, Müller-Bravo, Tomás E, additional, Nicholl, Matt, additional, Pignata, Giuliano, additional, Cartier, Regis, additional, Gromadzki, Mariusz, additional, Kozyreva, Alexandra, additional, Rau, Arne, additional, Burke, Jamison, additional, Howell, D Andrew, additional, McCully, Curtis, additional, and Pellegrino, Craig, additional

Published
2021
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9. PISCOLA: a data-driven transient light-curve fitter.

Author

Müller-Bravo, Tomás E, Sullivan, Mark, Smith, Mathew, Frohmaier, Chris, Gutiérrez, Claudia P, Wiseman, Philip, and Zontou, Zoe

Subjects
LIGHT curves, MATRIX decomposition, NONNEGATIVE matrices, GAUSSIAN processes, OBSERVATORIES
Abstract

Forthcoming time-domain surveys, such as the Rubin Observatory Legacy Survey of Space and Time, will vastly increase samples of supernovae (SNe) and other optical transients, requiring new data-driven techniques to analyse their photometric light curves. Here, we present the 'Python for Intelligent Supernova-COsmology Light-curve Analysis' (PISCOLA ), an open source data-driven light-curve fitter using Gaussian Processes that can estimate rest-frame light curves of transients without the need for an underlying light-curve template. We test PISCOLA  on large-scale simulations of type Ia SNe (SNe Ia) to validate its performance, and show it successfully retrieves rest-frame peak magnitudes for average survey cadences of up to 7 d. We also compare to the existing SN Ia light-curve fitter SALT2 on real data, and find only small (but significant) disagreements for different light-curve parameters. As a proof-of-concept of an application of PISCOLA , we decomposed and analysed the PISCOLA rest-frame light curves of SNe Ia from the Pantheon SN Ia sample with Non-Negative Matrix Factorization. Our new parametrization provides a similar performance to existing light-curve fitters such as SALT2. We further derived a SN Ia colour law from PISCOLA fits over ∼3500–7000 Å, and find agreement with the SALT2 colour law and with reddening laws with total-to-selective extinction ratio RV ≲ 3.1. [ABSTRACT FROM AUTHOR]

Published
2022
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10. The low-luminosity Type II SN 2016aqf: a well-monitored spectral evolution of the Ni/Fe abundance ratio

Author

Müller-Bravo, Tomás E, primary, Gutiérrez, Claudia P, additional, Sullivan, Mark, additional, Jerkstrand, Anders, additional, Anderson, Joseph P, additional, González-Gaitán, Santiago, additional, Sollerman, Jesper, additional, Arcavi, Iair, additional, Burke, Jamison, additional, Galbany, Lluís, additional, Gal-Yam, Avishay, additional, Gromadzki, Mariusz, additional, Hiramatsu, Daichi, additional, Hosseinzadeh, Griffin, additional, Howell, D Andrew, additional, Inserra, Cosimo, additional, Kankare, Erki, additional, Kozyreva, Alexandra, additional, McCully, Curtis, additional, Nicholl, Matt, additional, Smartt, Stephen, additional, Valenti, Stefano, additional, and Young, Dave R, additional

Published
2020
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11. Signatures of circumstellar interaction in the Type IIL supernova ASASSN-15oz

Author

Bostroem, K Azalee, primary, Valenti, Stefano, additional, Horesh, Assaf, additional, Morozova, Viktoriya, additional, Kuin, N Paul M, additional, Wyatt, Samuel, additional, Jerkstrand, Anders, additional, Sand, David J, additional, Lundquist, Michael, additional, Smith, Mathew, additional, Sullivan, Mark, additional, Hosseinzadeh, Griffin, additional, Arcavi, Iair, additional, Callis, Emma, additional, Cartier, Régis, additional, Gal-Yam, Avishay, additional, Galbany, Lluís, additional, Gutiérrez, Claudia, additional, Howell, D Andrew, additional, Inserra, Cosimo, additional, Kankare, Erkki, additional, López, Kristhell Marisol, additional, McCully, Curtis, additional, Pignata, Giuliano, additional, Piro, Anthony L, additional, Rodríguez, Ósmar, additional, Smartt, Stephen J, additional, Smith, Kenneth W, additional, Yaron, Ofer, additional, and Young, David R, additional

Published
2019
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12. SN 2016esw: a luminous Type II supernova observed within the first day after the explosion

Author

de Jaeger, Thomas, primary, Galbany, Lluís, additional, Gutiérrez, Claudia P, additional, Filippenko, Alexei V, additional, Zheng, WeiKang, additional, Brink, Thomas G, additional, Foley, Ryan J, additional, Sánchez, Sebastian F, additional, Channa, Sanyum, additional, de Kouchkovsky, Maxime, additional, Halevi, Goni, additional, Kilpatrick, Charles D, additional, Kumar, Sahana, additional, Molloy, Jeffrey, additional, Pan, Yen-Chen, additional, Ross, Timothy W, additional, Shivvers, Isaac, additional, Siebert, Matthew R, additional, Stahl, Benjamin, additional, Stegman, Samantha, additional, and Yunus, Sameen, additional

Published
2018
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