Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631

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Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631. / Cai, Y-Z; Pastorello, A.; Fraser, M.; Wang, X-F; Filippenko, A.; Reguitti, A.; Patra, K. C.; Goranskij, V. P.; Barsukova, E. A.; Brink, T. G.; Elias-Rosa, N.; Stevance, H. F.; Zheng, W.; Yang, Y.; Atapin, K. E.; Benetti, S.; de Boer, T. J. L.; Bose, S.; Burke, J.; Byrne, R.; Cappellaro, E.; Chambers, K. C.; Chen, W-L; Emami, N.; Gao, H.; Hiramatsu, D.; Howell, D. A.; Huber, M. E.; Kankare, E.; Kelly, P. L.; Kotak, R.; Kravtsov, T.; Lander, V. Yu; Li, Z-T; Lin, C-C; Lundqvist, P.; Magnier, E. A.; Malygin, E. A.; Maslennikova, N. A.; Matilainen, K.; Mazzali, P. A.; McCully, C.; Mo, J.; Moran, S.; Newsome, M.; Oparin, D.; Gonzalez, E. Padilla; Reynolds, T. M.; Shatsky, N.; Smartt, S. J.; Smith, K. W.; Stritzinger, M. D.; Tatarnikov, A. M.; Terreran, G.; Uklein, R.; Valerin, G.; Vallely, P. J.; Vozyakova, O. V.; Wainscoat, R.; Yan, S-Y; Zhang, J-J; Zhang, T-M; Zheltoukhov, S. G.; Dastidar, R.; Fulton, M.; Galbany, L.; Gangopadhyay, A.; Ge, H-W; Gutierrez, C. P.; Lin, H.; Misra, K.; Ou, Z-W; Salmaso, Nico; Tartaglia, L.; Xiao, L.; Zhang, X-H.

In: Astronomy & Astrophysics, Vol. 667, A4, 28.10.2022.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Cai, Y-Z, Pastorello, A, Fraser, M, Wang, X-F, Filippenko, A, Reguitti, A, Patra, KC, Goranskij, VP, Barsukova, EA, Brink, TG, Elias-Rosa, N, Stevance, HF, Zheng, W, Yang, Y, Atapin, KE, Benetti, S, de Boer, TJL, Bose, S, Burke, J, Byrne, R, Cappellaro, E, Chambers, KC, Chen, W-L, Emami, N, Gao, H, Hiramatsu, D, Howell, DA, Huber, ME, Kankare, E, Kelly, PL, Kotak, R, Kravtsov, T, Lander, VY, Li, Z-T, Lin, C-C, Lundqvist, P, Magnier, EA, Malygin, EA, Maslennikova, NA, Matilainen, K, Mazzali, PA, McCully, C, Mo, J, Moran, S, Newsome, M, Oparin, D, Gonzalez, EP, Reynolds, TM, Shatsky, N, Smartt, SJ, Smith, KW, Stritzinger, MD, Tatarnikov, AM, Terreran, G, Uklein, R, Valerin, G, Vallely, PJ, Vozyakova, OV, Wainscoat, R, Yan, S-Y, Zhang, J-J, Zhang, T-M, Zheltoukhov, SG, Dastidar, R, Fulton, M, Galbany, L, Gangopadhyay, A, Ge, H-W, Gutierrez, CP, Lin, H, Misra, K, Ou, Z-W, Salmaso, N, Tartaglia, L, Xiao, L & Zhang, X-H 2022, 'Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631', Astronomy & Astrophysics, vol. 667, A4. https://doi.org/10.1051/0004-6361/202244393

APA

Cai, Y-Z., Pastorello, A., Fraser, M., Wang, X-F., Filippenko, A., Reguitti, A., Patra, K. C., Goranskij, V. P., Barsukova, E. A., Brink, T. G., Elias-Rosa, N., Stevance, H. F., Zheng, W., Yang, Y., Atapin, K. E., Benetti, S., de Boer, T. J. L., Bose, S., Burke, J., ... Zhang, X-H. (2022). Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631. Astronomy & Astrophysics, 667, [A4]. https://doi.org/10.1051/0004-6361/202244393

Vancouver

Cai Y-Z, Pastorello A, Fraser M, Wang X-F, Filippenko A, Reguitti A et al. Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631. Astronomy & Astrophysics. 2022 Oct 28;667. A4. https://doi.org/10.1051/0004-6361/202244393

Author

Cai, Y-Z ; Pastorello, A. ; Fraser, M. ; Wang, X-F ; Filippenko, A. ; Reguitti, A. ; Patra, K. C. ; Goranskij, V. P. ; Barsukova, E. A. ; Brink, T. G. ; Elias-Rosa, N. ; Stevance, H. F. ; Zheng, W. ; Yang, Y. ; Atapin, K. E. ; Benetti, S. ; de Boer, T. J. L. ; Bose, S. ; Burke, J. ; Byrne, R. ; Cappellaro, E. ; Chambers, K. C. ; Chen, W-L ; Emami, N. ; Gao, H. ; Hiramatsu, D. ; Howell, D. A. ; Huber, M. E. ; Kankare, E. ; Kelly, P. L. ; Kotak, R. ; Kravtsov, T. ; Lander, V. Yu ; Li, Z-T ; Lin, C-C ; Lundqvist, P. ; Magnier, E. A. ; Malygin, E. A. ; Maslennikova, N. A. ; Matilainen, K. ; Mazzali, P. A. ; McCully, C. ; Mo, J. ; Moran, S. ; Newsome, M. ; Oparin, D. ; Gonzalez, E. Padilla ; Reynolds, T. M. ; Shatsky, N. ; Smartt, S. J. ; Smith, K. W. ; Stritzinger, M. D. ; Tatarnikov, A. M. ; Terreran, G. ; Uklein, R. ; Valerin, G. ; Vallely, P. J. ; Vozyakova, O. V. ; Wainscoat, R. ; Yan, S-Y ; Zhang, J-J ; Zhang, T-M ; Zheltoukhov, S. G. ; Dastidar, R. ; Fulton, M. ; Galbany, L. ; Gangopadhyay, A. ; Ge, H-W ; Gutierrez, C. P. ; Lin, H. ; Misra, K. ; Ou, Z-W ; Salmaso, Nico ; Tartaglia, L. ; Xiao, L. ; Zhang, X-H. / Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631. In: Astronomy & Astrophysics. 2022 ; Vol. 667.

Bibtex

@article{18ea49c20c304c7398ab84f4ba576acb,
title = "Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631",
abstract = "We present an observational study of the luminous red nova (LRN) AT 2021biy in the nearby galaxy NGC 4631. The field of the object was routinely imaged during the pre-eruptive stage by synoptic surveys, but the transient was detected only at a few epochs from similar to 231 days before maximum brightness. The LRN outburst was monitored with unprecedented cadence both photometrically and spectroscopically. AT 2021biy shows a short-duration blue peak, with a bolometric luminosity of similar to 1.6 x 10(41) erg s(-1), followed by the longest plateau among LRNe to date, with a duration of 210 days. A late-time hump in the light curve was also observed, possibly produced by a shell-shell collision. AT 2021biy exhibits the typical spectral evolution of LRNe. Early-time spectra are characterised by a blue continuum and prominent H emission lines. Then, the continuum becomes redder, resembling that of a K-type star with a forest of metal absorption lines during the plateau phase. Finally, late-time spectra show a very red continuum (T-BB approximate to 2050 K) with molecular features (e.g., TiO) resembling those of M-type stars. Spectropolarimetric analysis indicates that AT 2021biy has local dust properties similar to those of V838 Mon in the Milky Way Galaxy. Inspection of archival Hubble Space Telescope data taken on 2003 August 3 reveals a similar to 20 M-circle dot progenitor candidate with log (L/L-circle dot)= 5.0 dex and T-eff = 5900 K at solar metallicity. The above luminosity and colour match those of a luminous yellow supergiant. Most likely, this source is a close binary, with a 17-24 M(circle dot)( )primary component.",
keywords = "binaries: close, stars: winds, outflows, stars: individual: AT 2021biy, ELECTRON-CAPTURE SUPERNOVAE, RICH CIRCUMSTELLAR MEDIUM, SN HUNT 248, STELLAR MERGERS, V838 MONOCEROTIS, V4332 SAGITTARII, DUSTY AFTERMATH, DATA RELEASE, EVOLUTION, TRANSIENT",
author = "Y-Z Cai and A. Pastorello and M. Fraser and X-F Wang and A. Filippenko and A. Reguitti and Patra, {K. C.} and Goranskij, {V. P.} and Barsukova, {E. A.} and Brink, {T. G.} and N. Elias-Rosa and Stevance, {H. F.} and W. Zheng and Y. Yang and Atapin, {K. E.} and S. Benetti and {de Boer}, {T. J. L.} and S. Bose and J. Burke and R. Byrne and E. Cappellaro and Chambers, {K. C.} and W-L Chen and N. Emami and H. Gao and D. Hiramatsu and Howell, {D. A.} and Huber, {M. E.} and E. Kankare and Kelly, {P. L.} and R. Kotak and T. Kravtsov and Lander, {V. Yu} and Z-T Li and C-C Lin and P. Lundqvist and Magnier, {E. A.} and Malygin, {E. A.} and Maslennikova, {N. A.} and K. Matilainen and Mazzali, {P. A.} and C. McCully and J. Mo and S. Moran and M. Newsome and D. Oparin and Gonzalez, {E. Padilla} and Reynolds, {T. M.} and N. Shatsky and Smartt, {S. J.} and Smith, {K. W.} and Stritzinger, {M. D.} and Tatarnikov, {A. M.} and G. Terreran and R. Uklein and G. Valerin and Vallely, {P. J.} and Vozyakova, {O. V.} and R. Wainscoat and S-Y Yan and J-J Zhang and T-M Zhang and Zheltoukhov, {S. G.} and R. Dastidar and M. Fulton and L. Galbany and A. Gangopadhyay and H-W Ge and Gutierrez, {C. P.} and H. Lin and K. Misra and Z-W Ou and Nico Salmaso and L. Tartaglia and L. Xiao and X-H Zhang",
year = "2022",
month = oct,
day = "28",
doi = "10.1051/0004-6361/202244393",
language = "English",
volume = "667",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "E D P Sciences",

}

RIS

TY - JOUR

T1 - Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631

AU - Cai, Y-Z

AU - Pastorello, A.

AU - Fraser, M.

AU - Wang, X-F

AU - Filippenko, A.

AU - Reguitti, A.

AU - Patra, K. C.

AU - Goranskij, V. P.

AU - Barsukova, E. A.

AU - Brink, T. G.

AU - Elias-Rosa, N.

AU - Stevance, H. F.

AU - Zheng, W.

AU - Yang, Y.

AU - Atapin, K. E.

AU - Benetti, S.

AU - de Boer, T. J. L.

AU - Bose, S.

AU - Burke, J.

AU - Byrne, R.

AU - Cappellaro, E.

AU - Chambers, K. C.

AU - Chen, W-L

AU - Emami, N.

AU - Gao, H.

AU - Hiramatsu, D.

AU - Howell, D. A.

AU - Huber, M. E.

AU - Kankare, E.

AU - Kelly, P. L.

AU - Kotak, R.

AU - Kravtsov, T.

AU - Lander, V. Yu

AU - Li, Z-T

AU - Lin, C-C

AU - Lundqvist, P.

AU - Magnier, E. A.

AU - Malygin, E. A.

AU - Maslennikova, N. A.

AU - Matilainen, K.

AU - Mazzali, P. A.

AU - McCully, C.

AU - Mo, J.

AU - Moran, S.

AU - Newsome, M.

AU - Oparin, D.

AU - Gonzalez, E. Padilla

AU - Reynolds, T. M.

AU - Shatsky, N.

AU - Smartt, S. J.

AU - Smith, K. W.

AU - Stritzinger, M. D.

AU - Tatarnikov, A. M.

AU - Terreran, G.

AU - Uklein, R.

AU - Valerin, G.

AU - Vallely, P. J.

AU - Vozyakova, O. V.

AU - Wainscoat, R.

AU - Yan, S-Y

AU - Zhang, J-J

AU - Zhang, T-M

AU - Zheltoukhov, S. G.

AU - Dastidar, R.

AU - Fulton, M.

AU - Galbany, L.

AU - Gangopadhyay, A.

AU - Ge, H-W

AU - Gutierrez, C. P.

AU - Lin, H.

AU - Misra, K.

AU - Ou, Z-W

AU - Salmaso, Nico

AU - Tartaglia, L.

AU - Xiao, L.

AU - Zhang, X-H

PY - 2022/10/28

Y1 - 2022/10/28

N2 - We present an observational study of the luminous red nova (LRN) AT 2021biy in the nearby galaxy NGC 4631. The field of the object was routinely imaged during the pre-eruptive stage by synoptic surveys, but the transient was detected only at a few epochs from similar to 231 days before maximum brightness. The LRN outburst was monitored with unprecedented cadence both photometrically and spectroscopically. AT 2021biy shows a short-duration blue peak, with a bolometric luminosity of similar to 1.6 x 10(41) erg s(-1), followed by the longest plateau among LRNe to date, with a duration of 210 days. A late-time hump in the light curve was also observed, possibly produced by a shell-shell collision. AT 2021biy exhibits the typical spectral evolution of LRNe. Early-time spectra are characterised by a blue continuum and prominent H emission lines. Then, the continuum becomes redder, resembling that of a K-type star with a forest of metal absorption lines during the plateau phase. Finally, late-time spectra show a very red continuum (T-BB approximate to 2050 K) with molecular features (e.g., TiO) resembling those of M-type stars. Spectropolarimetric analysis indicates that AT 2021biy has local dust properties similar to those of V838 Mon in the Milky Way Galaxy. Inspection of archival Hubble Space Telescope data taken on 2003 August 3 reveals a similar to 20 M-circle dot progenitor candidate with log (L/L-circle dot)= 5.0 dex and T-eff = 5900 K at solar metallicity. The above luminosity and colour match those of a luminous yellow supergiant. Most likely, this source is a close binary, with a 17-24 M(circle dot)( )primary component.

AB - We present an observational study of the luminous red nova (LRN) AT 2021biy in the nearby galaxy NGC 4631. The field of the object was routinely imaged during the pre-eruptive stage by synoptic surveys, but the transient was detected only at a few epochs from similar to 231 days before maximum brightness. The LRN outburst was monitored with unprecedented cadence both photometrically and spectroscopically. AT 2021biy shows a short-duration blue peak, with a bolometric luminosity of similar to 1.6 x 10(41) erg s(-1), followed by the longest plateau among LRNe to date, with a duration of 210 days. A late-time hump in the light curve was also observed, possibly produced by a shell-shell collision. AT 2021biy exhibits the typical spectral evolution of LRNe. Early-time spectra are characterised by a blue continuum and prominent H emission lines. Then, the continuum becomes redder, resembling that of a K-type star with a forest of metal absorption lines during the plateau phase. Finally, late-time spectra show a very red continuum (T-BB approximate to 2050 K) with molecular features (e.g., TiO) resembling those of M-type stars. Spectropolarimetric analysis indicates that AT 2021biy has local dust properties similar to those of V838 Mon in the Milky Way Galaxy. Inspection of archival Hubble Space Telescope data taken on 2003 August 3 reveals a similar to 20 M-circle dot progenitor candidate with log (L/L-circle dot)= 5.0 dex and T-eff = 5900 K at solar metallicity. The above luminosity and colour match those of a luminous yellow supergiant. Most likely, this source is a close binary, with a 17-24 M(circle dot)( )primary component.

KW - binaries: close

KW - stars: winds, outflows

KW - stars: individual: AT 2021biy

KW - ELECTRON-CAPTURE SUPERNOVAE

KW - RICH CIRCUMSTELLAR MEDIUM

KW - SN HUNT 248

KW - STELLAR MERGERS

KW - V838 MONOCEROTIS

KW - V4332 SAGITTARII

KW - DUSTY AFTERMATH

KW - DATA RELEASE

KW - EVOLUTION

KW - TRANSIENT

U2 - 10.1051/0004-6361/202244393

DO - 10.1051/0004-6361/202244393

M3 - Journal article

VL - 667

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - A4

ER -

ID: 326352645