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Title: | The periodic signals of Nova V1674 Herculis (2021) |
Authors: | Patterson, Joseph Enenstein, Josie de Miguel, Enrique Epstein-Martin, Marguerite Kemp, Jonathan Sabo, Richard Cooney, Walt Vanmunster, Tonny Dubovsky, Pavol Hambsch, Franz-Josef Myers, Gordon Lemay, Damien Sokolovsky, Kirill Collins, Donald Campbell, Tut Roberts, George Richmond, Michael Brincat, Stephen Ulowetz, Joseph Dvorak, Shawn Tordai, Tamas Dufoer, Sjoerd Cahaly, Andrew Galdies, Charles Goff, Bill Wilkin, Francis P. Wood, Matt A. |
Keywords: | Stars -- Formation Astronomical photometry Stars, Brightest -- Observations Stars -- Scintillation |
Issue Date: | 2022 |
Publisher: | The American Astronomical Society |
Citation: | Patterson, J., Enenstein, J., de Miguel, E., Epstein-Martin, M., Kemp, J., Sabo, R.,...Wood, M. A. (2022). The Periodic Signals of Nova V1674 Herculis (2021). The Astrophysical Journal Letters, 940(2), L56. |
Abstract: | We present time-series photometry during the early decline phase of the extremely fast nova V1674 Herculis. The 2021 light curve showed periodic signals at 0.152921(3) days , 501.486(5) s, which we interpret as respectively the orbital , white dwarf spin periods in the underlying binary. We also detected a sideb, signal at the difference frequency between these two clocks. During the first 15 days of outburst, the spin period appears to have increased by 0.014(1)%. This increase probably arose from the sudden loss of high-angular-momentum gas (“the nova explosion”) from the rotating, magnetic white dwarf. Both periodic signals appeared remarkably early in the outburst, which we attribute to the extreme speed with which the nova evolved (, became transparent to radiation from the inner binary). After that very fast initial period increase of 71 ms, the period subsequently decreased—at 182(18) ms yr−1 in 2021, , 88(18) ms yr−1 in 2022. These rates are ∼100× faster than typically seen in intermediate polars. This could be due to high accretion torques from very high mass-transfer rates, which might be common when low-mass donor stars are strongly irradiated by a nova outburst.} |
URI: | https://www.um.edu.mt/library/oar/handle/123456789/111188 |
Appears in Collections: | Scholarly Works - InsESEMP |
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File | Description | Size | Format | |
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The_Periodic_Signals_of_Nova_V1674_Herculis_2021.pdf | 688.74 kB | Adobe PDF | View/Open |
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