Early Spectral Evolution of Classical Novae: Consistent Evidence for Multiple Distinct Outflows

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Early Spectral Evolution of Classical Novae : Consistent Evidence for Multiple Distinct Outflows. / Aydi, E.; Chomiuk, L.; Izzo, L.; Harvey, E. J.; Leahy-McGregor, J.; Strader, J.; Buckley, D. A. H.; Sokolovsky, K. V.; Kawash, A.; Kochanek, C. S.; Linford, J. D.; Metzger, B. D.; Mukai, K.; Orio, M.; Shappee, B. J.; Shishkovsky, L.; Steinberg, E.; Swihart, S. J.; Sokoloski, J. L.; Walter, F. M.; Woudt, P. A.

I: Astrophysical Journal, Bind 905, Nr. 1, 62, 01.12.2020.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Aydi, E, Chomiuk, L, Izzo, L, Harvey, EJ, Leahy-McGregor, J, Strader, J, Buckley, DAH, Sokolovsky, KV, Kawash, A, Kochanek, CS, Linford, JD, Metzger, BD, Mukai, K, Orio, M, Shappee, BJ, Shishkovsky, L, Steinberg, E, Swihart, SJ, Sokoloski, JL, Walter, FM & Woudt, PA 2020, 'Early Spectral Evolution of Classical Novae: Consistent Evidence for Multiple Distinct Outflows', Astrophysical Journal, bind 905, nr. 1, 62. https://doi.org/10.3847/1538-4357/abc3bb

APA

Aydi, E., Chomiuk, L., Izzo, L., Harvey, E. J., Leahy-McGregor, J., Strader, J., Buckley, D. A. H., Sokolovsky, K. V., Kawash, A., Kochanek, C. S., Linford, J. D., Metzger, B. D., Mukai, K., Orio, M., Shappee, B. J., Shishkovsky, L., Steinberg, E., Swihart, S. J., Sokoloski, J. L., ... Woudt, P. A. (2020). Early Spectral Evolution of Classical Novae: Consistent Evidence for Multiple Distinct Outflows. Astrophysical Journal, 905(1), [62]. https://doi.org/10.3847/1538-4357/abc3bb

Vancouver

Aydi E, Chomiuk L, Izzo L, Harvey EJ, Leahy-McGregor J, Strader J o.a. Early Spectral Evolution of Classical Novae: Consistent Evidence for Multiple Distinct Outflows. Astrophysical Journal. 2020 dec. 1;905(1). 62. https://doi.org/10.3847/1538-4357/abc3bb

Author

Aydi, E. ; Chomiuk, L. ; Izzo, L. ; Harvey, E. J. ; Leahy-McGregor, J. ; Strader, J. ; Buckley, D. A. H. ; Sokolovsky, K. V. ; Kawash, A. ; Kochanek, C. S. ; Linford, J. D. ; Metzger, B. D. ; Mukai, K. ; Orio, M. ; Shappee, B. J. ; Shishkovsky, L. ; Steinberg, E. ; Swihart, S. J. ; Sokoloski, J. L. ; Walter, F. M. ; Woudt, P. A. / Early Spectral Evolution of Classical Novae : Consistent Evidence for Multiple Distinct Outflows. I: Astrophysical Journal. 2020 ; Bind 905, Nr. 1.

Bibtex

@article{3428a9b3442f47c0871400ed635fe11d,
title = "Early Spectral Evolution of Classical Novae: Consistent Evidence for Multiple Distinct Outflows",
abstract = "The physical mechanism driving mass ejection during a nova eruption is still poorly understood. Possibilities include ejection in a single ballistic event, a common-envelope interaction, a continuous wind, or some combination of these processes. Here, we present a study of 12 Galactic novae, for which we have premaximum high-resolution spectroscopy. All 12 novae show the same spectral evolution. Before optical peak, they show a slow P Cygni component. After peak, a fast component quickly arises, while the slow absorption remains superimposed on top of it, implying the presence of at least two physically distinct flows. For novae with high-cadence monitoring, a third, intermediate-velocity component is also observed. These observations are consistent with a scenario where the slow component is associated with the initial ejection of the accreted material and the fast component with a radiation-driven wind from the white dwarf. When these flows interact, the slow flow is swept up by the fast flow, producing the intermediate component. These colliding flows may produce the gamma-ray emission observed in some novae. Our spectra also show that the transient heavy-element absorption lines seen in some novae have the same velocity structure and evolution as the other lines in the spectrum, implying an association with the nova ejecta rather than a preexisting circumbinary reservoir of gas or material ablated from the secondary. While this basic scenario appears to qualitatively reproduce multiwavelength observations of classical novae, substantial theoretical and observational work is still needed to untangle the rich diversity of nova properties.",
keywords = "Novae, Cataclysmic variable stars, Classical novae, White dwarf stars, Compact objects, High resolution spectroscopy, Spectroscopy, COMMON ENVELOPE PHASE, GAMMA-RAY EMISSION, OPTICALLY THICK WINDS, NON-LTE, ECHELLE SPECTROGRAPH, DRAG LUMINOSITY, MASS EJECTION, PRE-MAXIMUM, OUTBURSTS, DECLINE",
author = "E. Aydi and L. Chomiuk and L. Izzo and Harvey, {E. J.} and J. Leahy-McGregor and J. Strader and Buckley, {D. A. H.} and Sokolovsky, {K. V.} and A. Kawash and Kochanek, {C. S.} and Linford, {J. D.} and Metzger, {B. D.} and K. Mukai and M. Orio and Shappee, {B. J.} and L. Shishkovsky and E. Steinberg and Swihart, {S. J.} and Sokoloski, {J. L.} and Walter, {F. M.} and Woudt, {P. A.}",
year = "2020",
month = dec,
day = "1",
doi = "10.3847/1538-4357/abc3bb",
language = "English",
volume = "905",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "1",

}

RIS

TY - JOUR

T1 - Early Spectral Evolution of Classical Novae

T2 - Consistent Evidence for Multiple Distinct Outflows

AU - Aydi, E.

AU - Chomiuk, L.

AU - Izzo, L.

AU - Harvey, E. J.

AU - Leahy-McGregor, J.

AU - Strader, J.

AU - Buckley, D. A. H.

AU - Sokolovsky, K. V.

AU - Kawash, A.

AU - Kochanek, C. S.

AU - Linford, J. D.

AU - Metzger, B. D.

AU - Mukai, K.

AU - Orio, M.

AU - Shappee, B. J.

AU - Shishkovsky, L.

AU - Steinberg, E.

AU - Swihart, S. J.

AU - Sokoloski, J. L.

AU - Walter, F. M.

AU - Woudt, P. A.

PY - 2020/12/1

Y1 - 2020/12/1

N2 - The physical mechanism driving mass ejection during a nova eruption is still poorly understood. Possibilities include ejection in a single ballistic event, a common-envelope interaction, a continuous wind, or some combination of these processes. Here, we present a study of 12 Galactic novae, for which we have premaximum high-resolution spectroscopy. All 12 novae show the same spectral evolution. Before optical peak, they show a slow P Cygni component. After peak, a fast component quickly arises, while the slow absorption remains superimposed on top of it, implying the presence of at least two physically distinct flows. For novae with high-cadence monitoring, a third, intermediate-velocity component is also observed. These observations are consistent with a scenario where the slow component is associated with the initial ejection of the accreted material and the fast component with a radiation-driven wind from the white dwarf. When these flows interact, the slow flow is swept up by the fast flow, producing the intermediate component. These colliding flows may produce the gamma-ray emission observed in some novae. Our spectra also show that the transient heavy-element absorption lines seen in some novae have the same velocity structure and evolution as the other lines in the spectrum, implying an association with the nova ejecta rather than a preexisting circumbinary reservoir of gas or material ablated from the secondary. While this basic scenario appears to qualitatively reproduce multiwavelength observations of classical novae, substantial theoretical and observational work is still needed to untangle the rich diversity of nova properties.

AB - The physical mechanism driving mass ejection during a nova eruption is still poorly understood. Possibilities include ejection in a single ballistic event, a common-envelope interaction, a continuous wind, or some combination of these processes. Here, we present a study of 12 Galactic novae, for which we have premaximum high-resolution spectroscopy. All 12 novae show the same spectral evolution. Before optical peak, they show a slow P Cygni component. After peak, a fast component quickly arises, while the slow absorption remains superimposed on top of it, implying the presence of at least two physically distinct flows. For novae with high-cadence monitoring, a third, intermediate-velocity component is also observed. These observations are consistent with a scenario where the slow component is associated with the initial ejection of the accreted material and the fast component with a radiation-driven wind from the white dwarf. When these flows interact, the slow flow is swept up by the fast flow, producing the intermediate component. These colliding flows may produce the gamma-ray emission observed in some novae. Our spectra also show that the transient heavy-element absorption lines seen in some novae have the same velocity structure and evolution as the other lines in the spectrum, implying an association with the nova ejecta rather than a preexisting circumbinary reservoir of gas or material ablated from the secondary. While this basic scenario appears to qualitatively reproduce multiwavelength observations of classical novae, substantial theoretical and observational work is still needed to untangle the rich diversity of nova properties.

KW - Novae

KW - Cataclysmic variable stars

KW - Classical novae

KW - White dwarf stars

KW - Compact objects

KW - High resolution spectroscopy

KW - Spectroscopy

KW - COMMON ENVELOPE PHASE

KW - GAMMA-RAY EMISSION

KW - OPTICALLY THICK WINDS

KW - NON-LTE

KW - ECHELLE SPECTROGRAPH

KW - DRAG LUMINOSITY

KW - MASS EJECTION

KW - PRE-MAXIMUM

KW - OUTBURSTS

KW - DECLINE

U2 - 10.3847/1538-4357/abc3bb

DO - 10.3847/1538-4357/abc3bb

M3 - Journal article

VL - 905

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 62

ER -

ID: 254463255