A survey for variable young stars with small telescopes: VI -- Analysis of the outbursting Be stars NSW284, Gaia19eyy, and VES263

Dirk Froebrich; Lynne A. Hillenbrand; Carys Herbert; Kishalay De; Jochen Eislöffel; Justyn Campbell-White; Ruhee Kahar; Franz-Josef Hambsch; Thomas Urtly; Adam Popowicz; Krzysztof Bernacki; Andrzej Malcher; Slawomir Lasota; Jerzy Fiolka; Piotr Jozwik-Wabik; Franky Dubois; Ludwig Logie; Steve Rau; Mark Phillips; George Fleming; Rafael Gonzalez Farfán; Francisco C. Soldán Alfaro; Tim Nelson; Stephen R. L. Futcher; Samantha M. Rolfe; David A. Campbell; Tony Vale; Pat Devine; Dawid Moździerski; Przemysław J. Mikołajczyk; Heinz-Bernd Eggenstein; Diego Rodriguez; Ivan L. Walton; Siegfried Vanaverbeke; Barry Merrikin; Yenal Öğmen; Alex Escartin Perez; Mario Morales Aimar; Georg Piehler; Lord Dover; Aashini L. Patel; Niall Miller; Jack Finch; Matt Hankins; Anna M. Moore; Tony Travouillon; Marek Szczepanski

doi:10.48550/arXiv.2302.02696

A survey for variable young stars with small telescopes: VI -- Analysis of the outbursting Be stars NSW284, Gaia19eyy, and VES263

Dirk Froebrich, Lynne A. Hillenbrand, Carys Herbert, Kishalay De, Jochen Eislöffel, Justyn Campbell-White, Ruhee Kahar, Franz-Josef Hambsch, Thomas Urtly, Adam Popowicz, Krzysztof Bernacki, Andrzej Malcher, Slawomir Lasota, Jerzy Fiolka, Piotr Jozwik-Wabik, Franky Dubois, Ludwig Logie, Steve Rau, Mark Phillips, George FlemingRafael Gonzalez Farfán, Francisco C. Soldán Alfaro, Tim Nelson, Stephen R. L. Futcher, Samantha M. Rolfe, David A. Campbell, Tony Vale, Pat Devine, Dawid Moździerski, Przemysław J. Mikołajczyk, Heinz-Bernd Eggenstein, Diego Rodriguez, Ivan L. Walton, Siegfried Vanaverbeke, Barry Merrikin, Yenal Öğmen, Alex Escartin Perez, Mario Morales Aimar, Georg Piehler, Lord Dover, Aashini L. Patel, Niall Miller, Jack Finch, Matt Hankins, Anna M. Moore, Tony Travouillon, Marek Szczepanski

Physics

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Abstract

This paper is one in a series reporting results from small telescope observations of variable young stars. Here, we study the repeating outbursts of three likely Be stars based on long-term optical, near-infrared, and mid-infrared photometry for all three objects, along with follow-up spectra for two of the three. The sources are characterised as rare, truly regularly outbursting Be stars. We interpret the photometric data within a framework for modelling light curve morphology, and find that the models correctly predict the burst shapes, including their larger amplitudes and later peaks towards longer wavelengths. We are thus able to infer the start and end times of mass loading into the circumstellar disks of these stars. The disk sizes are typically 3-6 times the areas of the central star. The disk temperatures are ~40%, and the disk luminosities are ~10% of those of the central Be star, respectively. The available spectroscopy is consistent with inside-out evolution of the disk. Higher excitation lines have larger velocity widths in their double-horned shaped emission profiles. Our observations and analysis support the decretion disk model for outbursting Be stars.

Original language	English
Publisher	arXiv
Pages	1-20
Number of pages	20
DOIs	https://doi.org/10.48550/arXiv.2302.02696
Publication status	Published - 6 Feb 2023

Keywords

astro-ph.SR

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10.48550/arXiv.2302.02696

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Froebrich, D., Hillenbrand, L. A., Herbert, C., De, K., Eislöffel, J., Campbell-White, J., Kahar, R., Hambsch, F.-J., Urtly, T., Popowicz, A., Bernacki, K., Malcher, A., Lasota, S., Fiolka, J., Jozwik-Wabik, P., Dubois, F., Logie, L., Rau, S., Phillips, M., ... Szczepanski, M. (2023). A survey for variable young stars with small telescopes: VI -- Analysis of the outbursting Be stars NSW284, Gaia19eyy, and VES263. (pp. 1-20). arXiv. https://doi.org/10.48550/arXiv.2302.02696

@techreport{a640ae94f9184a189fd44baf66b6060c,

title = "A survey for variable young stars with small telescopes: VI -- Analysis of the outbursting Be stars NSW284, Gaia19eyy, and VES263",

abstract = "This paper is one in a series reporting results from small telescope observations of variable young stars. Here, we study the repeating outbursts of three likely Be stars based on long-term optical, near-infrared, and mid-infrared photometry for all three objects, along with follow-up spectra for two of the three. The sources are characterised as rare, truly regularly outbursting Be stars. We interpret the photometric data within a framework for modelling light curve morphology, and find that the models correctly predict the burst shapes, including their larger amplitudes and later peaks towards longer wavelengths. We are thus able to infer the start and end times of mass loading into the circumstellar disks of these stars. The disk sizes are typically 3-6 times the areas of the central star. The disk temperatures are ~40%, and the disk luminosities are ~10% of those of the central Be star, respectively. The available spectroscopy is consistent with inside-out evolution of the disk. Higher excitation lines have larger velocity widths in their double-horned shaped emission profiles. Our observations and analysis support the decretion disk model for outbursting Be stars. ",

keywords = "astro-ph.SR",

author = "Dirk Froebrich and Hillenbrand, {Lynne A.} and Carys Herbert and Kishalay De and Jochen Eisl{\"o}ffel and Justyn Campbell-White and Ruhee Kahar and Franz-Josef Hambsch and Thomas Urtly and Adam Popowicz and Krzysztof Bernacki and Andrzej Malcher and Slawomir Lasota and Jerzy Fiolka and Piotr Jozwik-Wabik and Franky Dubois and Ludwig Logie and Steve Rau and Mark Phillips and George Fleming and Farf{\'a}n, {Rafael Gonzalez} and Alfaro, {Francisco C. Sold{\'a}n} and Tim Nelson and Futcher, {Stephen R. L.} and Rolfe, {Samantha M.} and Campbell, {David A.} and Tony Vale and Pat Devine and Dawid Mo{\'z}dzierski and Miko{\l}ajczyk, {Przemys{\l}aw J.} and Heinz-Bernd Eggenstein and Diego Rodriguez and Walton, {Ivan L.} and Siegfried Vanaverbeke and Barry Merrikin and Yenal {\"O}ğmen and Perez, {Alex Escartin} and Aimar, {Mario Morales} and Georg Piehler and Lord Dover and Patel, {Aashini L.} and Niall Miller and Jack Finch and Matt Hankins and Moore, {Anna M.} and Tony Travouillon and Marek Szczepanski",

note = "Accepted for publication by MNRAS. 20 pages, 11 figures, 2 tables",

year = "2023",

month = feb,

day = "6",

doi = "10.48550/arXiv.2302.02696",

language = "English",

pages = "1--20",

publisher = "arXiv",

type = "WorkingPaper",

institution = "arXiv",

}

Froebrich, D, Hillenbrand, LA, Herbert, C, De, K, Eislöffel, J, Campbell-White, J, Kahar, R, Hambsch, F-J, Urtly, T, Popowicz, A, Bernacki, K, Malcher, A, Lasota, S, Fiolka, J, Jozwik-Wabik, P, Dubois, F, Logie, L, Rau, S, Phillips, M, Fleming, G, Farfán, RG, Alfaro, FCS, Nelson, T, Futcher, SRL, Rolfe, SM, Campbell, DA, Vale, T, Devine, P, Moździerski, D, Mikołajczyk, PJ, Eggenstein, H-B, Rodriguez, D, Walton, IL, Vanaverbeke, S, Merrikin, B, Öğmen, Y, Perez, AE, Aimar, MM, Piehler, G, Dover, L, Patel, AL, Miller, N, Finch, J, Hankins, M, Moore, AM, Travouillon, T & Szczepanski, M 2023 'A survey for variable young stars with small telescopes: VI -- Analysis of the outbursting Be stars NSW284, Gaia19eyy, and VES263' arXiv, pp. 1-20. https://doi.org/10.48550/arXiv.2302.02696

TY - UNPB

T1 - A survey for variable young stars with small telescopes

T2 - VI -- Analysis of the outbursting Be stars NSW284, Gaia19eyy, and VES263

AU - Froebrich, Dirk

AU - Hillenbrand, Lynne A.

AU - Herbert, Carys

AU - De, Kishalay

AU - Eislöffel, Jochen

AU - Campbell-White, Justyn

AU - Kahar, Ruhee

AU - Hambsch, Franz-Josef

AU - Urtly, Thomas

AU - Popowicz, Adam

AU - Bernacki, Krzysztof

AU - Malcher, Andrzej

AU - Lasota, Slawomir

AU - Fiolka, Jerzy

AU - Jozwik-Wabik, Piotr

AU - Dubois, Franky

AU - Logie, Ludwig

AU - Rau, Steve

AU - Phillips, Mark

AU - Fleming, George

AU - Farfán, Rafael Gonzalez

AU - Alfaro, Francisco C. Soldán

AU - Nelson, Tim

AU - Futcher, Stephen R. L.

AU - Rolfe, Samantha M.

AU - Campbell, David A.

AU - Vale, Tony

AU - Devine, Pat

AU - Moździerski, Dawid

AU - Mikołajczyk, Przemysław J.

AU - Eggenstein, Heinz-Bernd

AU - Rodriguez, Diego

AU - Walton, Ivan L.

AU - Vanaverbeke, Siegfried

AU - Merrikin, Barry

AU - Öğmen, Yenal

AU - Perez, Alex Escartin

AU - Aimar, Mario Morales

AU - Piehler, Georg

AU - Dover, Lord

AU - Patel, Aashini L.

AU - Miller, Niall

AU - Finch, Jack

AU - Hankins, Matt

AU - Moore, Anna M.

AU - Travouillon, Tony

AU - Szczepanski, Marek

N1 - Accepted for publication by MNRAS. 20 pages, 11 figures, 2 tables

PY - 2023/2/6

Y1 - 2023/2/6

N2 - This paper is one in a series reporting results from small telescope observations of variable young stars. Here, we study the repeating outbursts of three likely Be stars based on long-term optical, near-infrared, and mid-infrared photometry for all three objects, along with follow-up spectra for two of the three. The sources are characterised as rare, truly regularly outbursting Be stars. We interpret the photometric data within a framework for modelling light curve morphology, and find that the models correctly predict the burst shapes, including their larger amplitudes and later peaks towards longer wavelengths. We are thus able to infer the start and end times of mass loading into the circumstellar disks of these stars. The disk sizes are typically 3-6 times the areas of the central star. The disk temperatures are ~40%, and the disk luminosities are ~10% of those of the central Be star, respectively. The available spectroscopy is consistent with inside-out evolution of the disk. Higher excitation lines have larger velocity widths in their double-horned shaped emission profiles. Our observations and analysis support the decretion disk model for outbursting Be stars.

AB - This paper is one in a series reporting results from small telescope observations of variable young stars. Here, we study the repeating outbursts of three likely Be stars based on long-term optical, near-infrared, and mid-infrared photometry for all three objects, along with follow-up spectra for two of the three. The sources are characterised as rare, truly regularly outbursting Be stars. We interpret the photometric data within a framework for modelling light curve morphology, and find that the models correctly predict the burst shapes, including their larger amplitudes and later peaks towards longer wavelengths. We are thus able to infer the start and end times of mass loading into the circumstellar disks of these stars. The disk sizes are typically 3-6 times the areas of the central star. The disk temperatures are ~40%, and the disk luminosities are ~10% of those of the central Be star, respectively. The available spectroscopy is consistent with inside-out evolution of the disk. Higher excitation lines have larger velocity widths in their double-horned shaped emission profiles. Our observations and analysis support the decretion disk model for outbursting Be stars.

KW - astro-ph.SR

UR - https://ui.adsabs.harvard.edu/abs/2023arXiv230202696F/abstract

U2 - 10.48550/arXiv.2302.02696

DO - 10.48550/arXiv.2302.02696

M3 - Preprint

SP - 1

EP - 20

BT - A survey for variable young stars with small telescopes

PB - arXiv

ER -

A survey for variable young stars with small telescopes: VI -- Analysis of the outbursting Be stars NSW284, Gaia19eyy, and VES263

Abstract

Keywords

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A survey for variable young stars with small telescopes: VI – Analysis of the outbursting Be stars NSW 284, gaia 19eyy, and VES 263

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