BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant $ζ$ Puppis unveils the photospheric drivers of its small- and large-scale wind structures

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BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant $ζ$ Puppis unveils the photospheric drivers of its small- and large-scale wind structures. / Ramiaramanantsoa, Tahina; Moffat, Anthony F. J.; Harmon, Robert; Ignace, Richard; St-Louis, Nicole; Vanbeveren, Dany; Shenar, Tomer; Pablo, Herbert; Richardson, Noel D.; Howarth, Ian D.; Stevens, Ian R.; Piaulet, Caroline; St-Jean, Lucas; Eversberg, Thomas; Pigulski, Andrzej; Popowicz, Adam; Kuschnig, Rainer; Zocłońska, Elżbieta; Buysschaert, Bram; Handler, Gerald; Weiss, Werner W.; Wade, Gregg A.; Rucinski, Slavek M.; Zwintz, Konstanze; Luckas, Paul; Heathcote, Bernard; Cacella, Paulo; Powles, Jonathan; Locke, Malcolm; Bohlsen, Terry; Chené, André-Nicolas; Miszalski, Brent; Waldron, Wayne L.; Kotze, Marissa M.; Kotze, Enrico J.; Böhm, Torsten.

In: Royal Astronomical Society. Monthly Notices, Vol. 473, No. 4, 01.02.2018, p. 5532–5569.

Research output: Contribution to journalArticle

Harvard

Ramiaramanantsoa, T, Moffat, AFJ, Harmon, R, Ignace, R, St-Louis, N, Vanbeveren, D, Shenar, T, Pablo, H, Richardson, ND, Howarth, ID, Stevens, IR, Piaulet, C, St-Jean, L, Eversberg, T, Pigulski, A, Popowicz, A, Kuschnig, R, Zocłońska, E, Buysschaert, B, Handler, G, Weiss, WW, Wade, GA, Rucinski, SM, Zwintz, K, Luckas, P, Heathcote, B, Cacella, P, Powles, J, Locke, M, Bohlsen, T, Chené, A-N, Miszalski, B, Waldron, WL, Kotze, MM, Kotze, EJ & Böhm, T 2018, 'BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant $ζ$ Puppis unveils the photospheric drivers of its small- and large-scale wind structures', Royal Astronomical Society. Monthly Notices, vol. 473, no. 4, pp. 5532–5569. https://doi.org/10.1093/mnras/stx2671

APA

Ramiaramanantsoa, T., Moffat, A. F. J., Harmon, R., Ignace, R., St-Louis, N., Vanbeveren, D., Shenar, T., Pablo, H., Richardson, N. D., Howarth, I. D., Stevens, I. R., Piaulet, C., St-Jean, L., Eversberg, T., Pigulski, A., Popowicz, A., Kuschnig, R., Zocłońska, E., Buysschaert, B., ... Böhm, T. (2018). BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant $ζ$ Puppis unveils the photospheric drivers of its small- and large-scale wind structures. Royal Astronomical Society. Monthly Notices, 473(4), 5532–5569. https://doi.org/10.1093/mnras/stx2671

Vancouver

Author

Ramiaramanantsoa, Tahina ; Moffat, Anthony F. J. ; Harmon, Robert ; Ignace, Richard ; St-Louis, Nicole ; Vanbeveren, Dany ; Shenar, Tomer ; Pablo, Herbert ; Richardson, Noel D. ; Howarth, Ian D. ; Stevens, Ian R. ; Piaulet, Caroline ; St-Jean, Lucas ; Eversberg, Thomas ; Pigulski, Andrzej ; Popowicz, Adam ; Kuschnig, Rainer ; Zocłońska, Elżbieta ; Buysschaert, Bram ; Handler, Gerald ; Weiss, Werner W. ; Wade, Gregg A. ; Rucinski, Slavek M. ; Zwintz, Konstanze ; Luckas, Paul ; Heathcote, Bernard ; Cacella, Paulo ; Powles, Jonathan ; Locke, Malcolm ; Bohlsen, Terry ; Chené, André-Nicolas ; Miszalski, Brent ; Waldron, Wayne L. ; Kotze, Marissa M. ; Kotze, Enrico J. ; Böhm, Torsten. / BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant $ζ$ Puppis unveils the photospheric drivers of its small- and large-scale wind structures. In: Royal Astronomical Society. Monthly Notices. 2018 ; Vol. 473, No. 4. pp. 5532–5569.

Bibtex

@article{756fb6512f884e73b2022dd2843fe2ea,
title = "BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant $ζ$ Puppis unveils the photospheric drivers of its small- and large-scale wind structures",
abstract = "From 5.5 months of dual-band optical photometric monitoring at the 1 mmag level, BRITE-Constellation has revealed two simultaneous types of variability in the O4I(n)fp star ζ Puppis: one single periodic non-sinusoidal component superimposed on a stochastic component. The monoperiodic component is the 1.78-d signal previously detected by Coriolis/Solar Mass Ejection Imager, but this time along with a prominent first harmonic. The shape of this signal changes over time, a behaviour that is incompatible with stellar oscillations but consistent with rotational modulation arising from evolving bright surface inhomogeneities. By means of a constrained non-linear light-curve inversion algorithm, we mapped the locations of the bright surface spots and traced their evolution. Our simultaneous ground-based multisite spectroscopic monitoring of the star unveiled cyclical modulation of its He II λ4686 wind emission line with the 1.78-d rotation period, showing signatures of corotating interaction regions that turn out to be driven by the bright photospheric spots observed by BRITE. Traces of wind clumps are also observed in the He II λ4686 line and are correlated with the amplitudes of the stochastic component of the light variations probed by BRITE at the photosphere, suggesting that the BRITE observations additionally unveiled the photospheric drivers of wind clumps in ζ Pup and that the clumping phenomenon starts at the very base of the wind. The origins of both the bright surface inhomogeneities and the stochastic light variations remain unknown, but a subsurface convective zone might play an important role in the generation of these two types of photospheric variability.",
keywords = "techniques: photometric, techniques: spectroscopic, stars: massive, stars: rotation, starspots, supergiants, stars: winds, outflows",
author = "Tahina Ramiaramanantsoa and Moffat, {Anthony F. J.} and Robert Harmon and Richard Ignace and Nicole St-Louis and Dany Vanbeveren and Tomer Shenar and Herbert Pablo and Richardson, {Noel D.} and Howarth, {Ian D.} and Stevens, {Ian R.} and Caroline Piaulet and Lucas St-Jean and Thomas Eversberg and Andrzej Pigulski and Adam Popowicz and Rainer Kuschnig and El{\.z}bieta Zoc{\l}o{\'n}ska and Bram Buysschaert and Gerald Handler and Weiss, {Werner W.} and Wade, {Gregg A.} and Rucinski, {Slavek M.} and Konstanze Zwintz and Paul Luckas and Bernard Heathcote and Paulo Cacella and Jonathan Powles and Malcolm Locke and Terry Bohlsen and Andr{\'e}-Nicolas Chen{\'e} and Brent Miszalski and Waldron, {Wayne L.} and Kotze, {Marissa M.} and Kotze, {Enrico J.} and Torsten B{\"o}hm",
year = "2018",
month = feb
day = "1",
doi = "10.1093/mnras/stx2671",
language = "English",
volume = "473",
pages = "5532–5569",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "SIPRI/Oxford University Press",
number = "4",

}

RIS

TY - JOUR

T1 - BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant $ζ$ Puppis unveils the photospheric drivers of its small- and large-scale wind structures

AU - Ramiaramanantsoa, Tahina

AU - Moffat, Anthony F. J.

AU - Harmon, Robert

AU - Ignace, Richard

AU - St-Louis, Nicole

AU - Vanbeveren, Dany

AU - Shenar, Tomer

AU - Pablo, Herbert

AU - Richardson, Noel D.

AU - Howarth, Ian D.

AU - Stevens, Ian R.

AU - Piaulet, Caroline

AU - St-Jean, Lucas

AU - Eversberg, Thomas

AU - Pigulski, Andrzej

AU - Popowicz, Adam

AU - Kuschnig, Rainer

AU - Zocłońska, Elżbieta

AU - Buysschaert, Bram

AU - Handler, Gerald

AU - Weiss, Werner W.

AU - Wade, Gregg A.

AU - Rucinski, Slavek M.

AU - Zwintz, Konstanze

AU - Luckas, Paul

AU - Heathcote, Bernard

AU - Cacella, Paulo

AU - Powles, Jonathan

AU - Locke, Malcolm

AU - Bohlsen, Terry

AU - Chené, André-Nicolas

AU - Miszalski, Brent

AU - Waldron, Wayne L.

AU - Kotze, Marissa M.

AU - Kotze, Enrico J.

AU - Böhm, Torsten

PY - 2018/2/1

Y1 - 2018/2/1

N2 - From 5.5 months of dual-band optical photometric monitoring at the 1 mmag level, BRITE-Constellation has revealed two simultaneous types of variability in the O4I(n)fp star ζ Puppis: one single periodic non-sinusoidal component superimposed on a stochastic component. The monoperiodic component is the 1.78-d signal previously detected by Coriolis/Solar Mass Ejection Imager, but this time along with a prominent first harmonic. The shape of this signal changes over time, a behaviour that is incompatible with stellar oscillations but consistent with rotational modulation arising from evolving bright surface inhomogeneities. By means of a constrained non-linear light-curve inversion algorithm, we mapped the locations of the bright surface spots and traced their evolution. Our simultaneous ground-based multisite spectroscopic monitoring of the star unveiled cyclical modulation of its He II λ4686 wind emission line with the 1.78-d rotation period, showing signatures of corotating interaction regions that turn out to be driven by the bright photospheric spots observed by BRITE. Traces of wind clumps are also observed in the He II λ4686 line and are correlated with the amplitudes of the stochastic component of the light variations probed by BRITE at the photosphere, suggesting that the BRITE observations additionally unveiled the photospheric drivers of wind clumps in ζ Pup and that the clumping phenomenon starts at the very base of the wind. The origins of both the bright surface inhomogeneities and the stochastic light variations remain unknown, but a subsurface convective zone might play an important role in the generation of these two types of photospheric variability.

AB - From 5.5 months of dual-band optical photometric monitoring at the 1 mmag level, BRITE-Constellation has revealed two simultaneous types of variability in the O4I(n)fp star ζ Puppis: one single periodic non-sinusoidal component superimposed on a stochastic component. The monoperiodic component is the 1.78-d signal previously detected by Coriolis/Solar Mass Ejection Imager, but this time along with a prominent first harmonic. The shape of this signal changes over time, a behaviour that is incompatible with stellar oscillations but consistent with rotational modulation arising from evolving bright surface inhomogeneities. By means of a constrained non-linear light-curve inversion algorithm, we mapped the locations of the bright surface spots and traced their evolution. Our simultaneous ground-based multisite spectroscopic monitoring of the star unveiled cyclical modulation of its He II λ4686 wind emission line with the 1.78-d rotation period, showing signatures of corotating interaction regions that turn out to be driven by the bright photospheric spots observed by BRITE. Traces of wind clumps are also observed in the He II λ4686 line and are correlated with the amplitudes of the stochastic component of the light variations probed by BRITE at the photosphere, suggesting that the BRITE observations additionally unveiled the photospheric drivers of wind clumps in ζ Pup and that the clumping phenomenon starts at the very base of the wind. The origins of both the bright surface inhomogeneities and the stochastic light variations remain unknown, but a subsurface convective zone might play an important role in the generation of these two types of photospheric variability.

KW - techniques: photometric

KW - techniques: spectroscopic

KW - stars: massive

KW - stars: rotation

KW - starspots

KW - supergiants

KW - stars: winds

KW - outflows

U2 - 10.1093/mnras/stx2671

DO - 10.1093/mnras/stx2671

M3 - Article

VL - 473

SP - 5532

EP - 5569

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -