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Forbidden hugs in pandemic times: IV. Panchromatic evolution of three luminous red novae

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Forbidden hugs in pandemic times: IV. Panchromatic evolution of three luminous red novae. / Pastorello, Andrea; Valerin, G.; Fraser, M. et al.
In: Astronomy and Astrophysics, Vol. 671, A158, 01.03.2023.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Pastorello, A, Valerin, G, Fraser, M, Reguitti, A, Elias-Rosa, N, Filippenko, AV, Rojas-Bravo, C, Tartaglia, L, Reynolds, TM, Valenti, S, Andrews, JE, Ashall, C, Bostroem, KA, Brink, TG, Burke, J, Cai, Y-Z, Cappellaro, E, Coulter, DA, Dastidar, R, Davis, KW, Dimitriadis, G, Fiore, A, Foley, RJ, Fugazza, D, Galbany, L, Gangopadhyay, A, Geier, S, Gutiérrez, CP, Haislip, J, Hiramatsu, D, Holmbo, S, Howell, DA, Hsiao, EY, Hung, T, Jha, SW, Kankare, E, Karamehmetoglu, E, Kilpatrick, CD, Kotak, R, Kouprianov, V, Kravtsov, T, Kumar, S, Li, Z-T, Lundquist, MJ, Lundqvist, P, Matilainen, K, Mazzali, PA, McCully, C, Misra, K, Morales-Garoffolo, A, Moran, S, Morrell, N, Newsome, M, Gonzalez, EP, Pan, Y-C, Pellegrino, C, Phillips, MM, Pignata, G, Piro, AL, Reichart, DE, Rest, A, Salmaso, I, Sand, DJ, Siebert, MR, Smartt, SJ, Smith, KW, Srivastav, S, Stritzinger, MD, Taggart, K, Tinyanont, S, Yan, S-Y, Wang, L, Wang, X-F, Williams, SC, Wyatt, S, Zhang, T-M, de Boer, T, Chambers, K, Gao, H & Magnier, E 2023, 'Forbidden hugs in pandemic times: IV. Panchromatic evolution of three luminous red novae', Astronomy and Astrophysics, vol. 671, A158. https://doi.org/10.1051/0004-6361/202244684

APA

Pastorello, A., Valerin, G., Fraser, M., Reguitti, A., Elias-Rosa, N., Filippenko, A. V., Rojas-Bravo, C., Tartaglia, L., Reynolds, T. M., Valenti, S., Andrews, J. E., Ashall, C., Bostroem, K. A., Brink, T. G., Burke, J., Cai, Y.-Z., Cappellaro, E., Coulter, D. A., Dastidar, R., ... Magnier, E. (2023). Forbidden hugs in pandemic times: IV. Panchromatic evolution of three luminous red novae. Astronomy and Astrophysics, 671, Article A158. https://doi.org/10.1051/0004-6361/202244684

Vancouver

Pastorello A, Valerin G, Fraser M, Reguitti A, Elias-Rosa N, Filippenko AV et al. Forbidden hugs in pandemic times: IV. Panchromatic evolution of three luminous red novae. Astronomy and Astrophysics. 2023 Mar 1;671:A158. doi: 10.1051/0004-6361/202244684

Author

Pastorello, Andrea ; Valerin, G. ; Fraser, M. et al. / Forbidden hugs in pandemic times : IV. Panchromatic evolution of three luminous red novae. In: Astronomy and Astrophysics. 2023 ; Vol. 671.

Bibtex

@article{7945a46e9b7547d390c6fbdb3fc898ee,
title = "Forbidden hugs in pandemic times: IV. Panchromatic evolution of three luminous red novae",
abstract = "We present photometric and spectroscopic data on three extragalactic luminous red novae (LRNe): AT 2018bwo, AT 2021afy, and AT 2021blu. AT 2018bwo was discovered in NGC 45 (at about 6.8 Mpc) a few weeks after the outburst onset. During the monitoring period, the transient reached a peak luminosity of 1040 erg s1. AT 2021afy, hosted by UGC 10043 (49.2 Mpc), showed a double-peaked light curve, with the two peaks reaching a similar luminosity of 2.1(±0.6) - 1041 erg s1. Finally, for AT 2021blu in UGC 5829 (∼8.6 Mpc), the pre-outburst phase was well-monitored by several photometric surveys, and the object showed a slow luminosity rise before the outburst. The light curve of AT 2021blu was sampled with an unprecedented cadence until the object disappeared behind the Sun, and it was then recovered at late phases. The light curve of LRN AT 2021blu shows a double peak, with a prominent early maximum reaching a luminosity of 6.5 - 1040 erg s1, which is half of that of AT 2021afy. The spectra of AT 2021afy and AT 2021blu display the expected evolution for LRNe: a blue continuum dominated by prominent Balmer lines in emission during the first peak, and a redder continuum consistent with that of a K-type star with narrow absorption metal lines during the second, broad maximum. The spectra of AT 2018bwo are markedly different, with a very red continuum dominated by broad molecular features in absorption. As these spectra closely resemble those of LRNe after the second peak, AT 2018bwo was probably discovered at the very late evolutionary stages. This would explain its fast evolution and the spectral properties compatible with that of an M-type star. From the analysis of deep frames of the LRN sites years before the outburst, and considerations of the light curves, the quiescent progenitor systems of the three LRNe were likely massive, with primaries ranging from about 13 M for AT 2018bwo, to 141+4 M⊙ for AT 2021blu, and over 40 M for AT 2021afy.",
keywords = "Binaries: close, Stars: individual: AT 2018bwo, Stars: individual: AT 2021afy, Stars: individual: AT 2021blu, Stars: winds, outflows",
author = "Andrea Pastorello and G. Valerin and M. Fraser and A. Reguitti and N. Elias-Rosa and Filippenko, {A. V.} and C. Rojas-Bravo and L. Tartaglia and Reynolds, {T. M.} and S. Valenti and Andrews, {J. E.} and C. Ashall and Bostroem, {K. A.} and Brink, {T. G.} and J. Burke and Y.-Z. Cai and E. Cappellaro and Coulter, {D. A.} and R. Dastidar and Davis, {K. W.} and G. Dimitriadis and A. Fiore and Foley, {R. J.} and D. Fugazza and L. Galbany and A. Gangopadhyay and S. Geier and Guti{\'e}rrez, {C. P.} and J. Haislip and D. Hiramatsu and S. Holmbo and Howell, {D. A.} and Hsiao, {E. Y.} and T. Hung and Jha, {S. W.} and E. Kankare and E. Karamehmetoglu and Kilpatrick, {C. D.} and R. Kotak and V. Kouprianov and T. Kravtsov and S. Kumar and Z.-T. Li and Lundquist, {M. J.} and P. Lundqvist and K. Matilainen and Mazzali, {P. A.} and C. McCully and K. Misra and A. Morales-Garoffolo and S. Moran and N. Morrell and M. Newsome and Gonzalez, {E. Padilla} and Y.-C. Pan and C. Pellegrino and Phillips, {M. M.} and G. Pignata and Piro, {A. L.} and Reichart, {D. E.} and A. Rest and I. Salmaso and Sand, {D. J.} and Siebert, {M. R.} and Smartt, {S. J.} and Smith, {K. W.} and S. Srivastav and Stritzinger, {M. D.} and K. Taggart and S. Tinyanont and S.-Y. Yan and L. Wang and X.-F. Wang and Williams, {S. C.} and S. Wyatt and T.-M. Zhang and {de Boer}, T. and K. Chambers and H. Gao and E. Magnier",
year = "2023",
month = mar,
day = "1",
doi = "10.1051/0004-6361/202244684",
language = "English",
volume = "671",
journal = "Astronomy and Astrophysics",
issn = "1432-0746",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - Forbidden hugs in pandemic times

T2 - IV. Panchromatic evolution of three luminous red novae

AU - Pastorello, Andrea

AU - Valerin, G.

AU - Fraser, M.

AU - Reguitti, A.

AU - Elias-Rosa, N.

AU - Filippenko, A. V.

AU - Rojas-Bravo, C.

AU - Tartaglia, L.

AU - Reynolds, T. M.

AU - Valenti, S.

AU - Andrews, J. E.

AU - Ashall, C.

AU - Bostroem, K. A.

AU - Brink, T. G.

AU - Burke, J.

AU - Cai, Y.-Z.

AU - Cappellaro, E.

AU - Coulter, D. A.

AU - Dastidar, R.

AU - Davis, K. W.

AU - Dimitriadis, G.

AU - Fiore, A.

AU - Foley, R. J.

AU - Fugazza, D.

AU - Galbany, L.

AU - Gangopadhyay, A.

AU - Geier, S.

AU - Gutiérrez, C. P.

AU - Haislip, J.

AU - Hiramatsu, D.

AU - Holmbo, S.

AU - Howell, D. A.

AU - Hsiao, E. Y.

AU - Hung, T.

AU - Jha, S. W.

AU - Kankare, E.

AU - Karamehmetoglu, E.

AU - Kilpatrick, C. D.

AU - Kotak, R.

AU - Kouprianov, V.

AU - Kravtsov, T.

AU - Kumar, S.

AU - Li, Z.-T.

AU - Lundquist, M. J.

AU - Lundqvist, P.

AU - Matilainen, K.

AU - Mazzali, P. A.

AU - McCully, C.

AU - Misra, K.

AU - Morales-Garoffolo, A.

AU - Moran, S.

AU - Morrell, N.

AU - Newsome, M.

AU - Gonzalez, E. Padilla

AU - Pan, Y.-C.

AU - Pellegrino, C.

AU - Phillips, M. M.

AU - Pignata, G.

AU - Piro, A. L.

AU - Reichart, D. E.

AU - Rest, A.

AU - Salmaso, I.

AU - Sand, D. J.

AU - Siebert, M. R.

AU - Smartt, S. J.

AU - Smith, K. W.

AU - Srivastav, S.

AU - Stritzinger, M. D.

AU - Taggart, K.

AU - Tinyanont, S.

AU - Yan, S.-Y.

AU - Wang, L.

AU - Wang, X.-F.

AU - Williams, S. C.

AU - Wyatt, S.

AU - Zhang, T.-M.

AU - de Boer, T.

AU - Chambers, K.

AU - Gao, H.

AU - Magnier, E.

PY - 2023/3/1

Y1 - 2023/3/1

N2 - We present photometric and spectroscopic data on three extragalactic luminous red novae (LRNe): AT 2018bwo, AT 2021afy, and AT 2021blu. AT 2018bwo was discovered in NGC 45 (at about 6.8 Mpc) a few weeks after the outburst onset. During the monitoring period, the transient reached a peak luminosity of 1040 erg s1. AT 2021afy, hosted by UGC 10043 (49.2 Mpc), showed a double-peaked light curve, with the two peaks reaching a similar luminosity of 2.1(±0.6) - 1041 erg s1. Finally, for AT 2021blu in UGC 5829 (∼8.6 Mpc), the pre-outburst phase was well-monitored by several photometric surveys, and the object showed a slow luminosity rise before the outburst. The light curve of AT 2021blu was sampled with an unprecedented cadence until the object disappeared behind the Sun, and it was then recovered at late phases. The light curve of LRN AT 2021blu shows a double peak, with a prominent early maximum reaching a luminosity of 6.5 - 1040 erg s1, which is half of that of AT 2021afy. The spectra of AT 2021afy and AT 2021blu display the expected evolution for LRNe: a blue continuum dominated by prominent Balmer lines in emission during the first peak, and a redder continuum consistent with that of a K-type star with narrow absorption metal lines during the second, broad maximum. The spectra of AT 2018bwo are markedly different, with a very red continuum dominated by broad molecular features in absorption. As these spectra closely resemble those of LRNe after the second peak, AT 2018bwo was probably discovered at the very late evolutionary stages. This would explain its fast evolution and the spectral properties compatible with that of an M-type star. From the analysis of deep frames of the LRN sites years before the outburst, and considerations of the light curves, the quiescent progenitor systems of the three LRNe were likely massive, with primaries ranging from about 13 M for AT 2018bwo, to 141+4 M⊙ for AT 2021blu, and over 40 M for AT 2021afy.

AB - We present photometric and spectroscopic data on three extragalactic luminous red novae (LRNe): AT 2018bwo, AT 2021afy, and AT 2021blu. AT 2018bwo was discovered in NGC 45 (at about 6.8 Mpc) a few weeks after the outburst onset. During the monitoring period, the transient reached a peak luminosity of 1040 erg s1. AT 2021afy, hosted by UGC 10043 (49.2 Mpc), showed a double-peaked light curve, with the two peaks reaching a similar luminosity of 2.1(±0.6) - 1041 erg s1. Finally, for AT 2021blu in UGC 5829 (∼8.6 Mpc), the pre-outburst phase was well-monitored by several photometric surveys, and the object showed a slow luminosity rise before the outburst. The light curve of AT 2021blu was sampled with an unprecedented cadence until the object disappeared behind the Sun, and it was then recovered at late phases. The light curve of LRN AT 2021blu shows a double peak, with a prominent early maximum reaching a luminosity of 6.5 - 1040 erg s1, which is half of that of AT 2021afy. The spectra of AT 2021afy and AT 2021blu display the expected evolution for LRNe: a blue continuum dominated by prominent Balmer lines in emission during the first peak, and a redder continuum consistent with that of a K-type star with narrow absorption metal lines during the second, broad maximum. The spectra of AT 2018bwo are markedly different, with a very red continuum dominated by broad molecular features in absorption. As these spectra closely resemble those of LRNe after the second peak, AT 2018bwo was probably discovered at the very late evolutionary stages. This would explain its fast evolution and the spectral properties compatible with that of an M-type star. From the analysis of deep frames of the LRN sites years before the outburst, and considerations of the light curves, the quiescent progenitor systems of the three LRNe were likely massive, with primaries ranging from about 13 M for AT 2018bwo, to 141+4 M⊙ for AT 2021blu, and over 40 M for AT 2021afy.

KW - Binaries: close

KW - Stars: individual: AT 2018bwo

KW - Stars: individual: AT 2021afy

KW - Stars: individual: AT 2021blu

KW - Stars: winds, outflows

U2 - 10.1051/0004-6361/202244684

DO - 10.1051/0004-6361/202244684

M3 - Journal article

VL - 671

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 1432-0746

M1 - A158

ER -