Search Results - "Finley, Adam J."

The Effect of Combined Magnetic Geometries on Thermally Driven Winds. II. Dipolar, Quadrupolar, and Octupolar Topologies by Finley, Adam J., Matt, Sean P.

“…During the lifetime of Sun-like or low-mass stars a significant amount of angular momentum is removed through magnetized stellar winds. This process is often…”
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The Effect of Combined Magnetic Geometries on Thermally Driven Winds. I. Interaction of Dipolar and Quadrupolar Fields by Finley, Adam J., Matt, Sean P.

“…Cool stars with outer convective envelopes are observed to have magnetic fields with a variety of geometries, which on large scales are dominated by a…”
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The Effect of Magnetic Variability on Stellar Angular Momentum Loss. I. The Solar Wind Torque during Sunspot Cycles 23 and 24 by Finley, Adam J., Matt, Sean P., See, Victor

“…The rotational evolution of cool stars is governed by magnetized stellar winds that slow the stellar rotation during their main sequence lifetimes. Magnetic…”
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Do Non-dipolar Magnetic Fields Contribute to Spin-down Torques? by See, Victor, Matt, Sean P., Finley, Adam J., Folsom, Colin P., Saikia, Sudeshna Boro, Donati, Jean-Francois, Fares, Rim, Hébrard, Élodie M., Jardine, Moira M., Jeffers, Sandra V., Marsden, Stephen C., Mengel, Matthew W., Morin, Julien, Petit, Pascal, Vidotto, Aline A., Waite, Ian A.

“…Main-sequence low-mass stars are known to spin down as a consequence of their magnetized stellar winds. However, estimating the precise rate of this spin-down…”
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Alfvén-wave-driven Magnetic Rotator Winds from Low-mass Stars. I. Rotation Dependences of Magnetic Braking and Mass-loss Rate by Shoda, Munehito, Suzuki, Takeru K., Matt, Sean P., Cranmer, Steven R., Vidotto, Aline A., Strugarek, Antoine, See, Victor, Réville, Victor, Finley, Adam J., Brun, Allan Sacha

“…Observations of stellar rotation show that low-mass stars lose angular momentum during the main sequence. We simulate the winds of sunlike stars with a range…”
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The Origin of Weakened Magnetic Braking in Old Solar Analogs by Metcalfe, Travis S., Finley, Adam J., Kochukhov, Oleg, See, Victor, Ayres, Thomas R., Stassun, Keivan G., van Saders, Jennifer L., Clark, Catherine A., Godoy-Rivera, Diego, Ilyin, Ilya V., Pinsonneault, Marc H., Strassmeier, Klaus G., Petit, Pascal

“…Abstract The rotation rates of main-sequence stars slow over time as they gradually lose angular momentum to their magnetized stellar winds. The rate of…”
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How Much Do Underestimated Field Strengths from Zeeman-Doppler Imaging Affect Spin-down Torque Estimates? by See, Victor, Lehmann, Lisa, Matt, Sean P., Finley, Adam J.

“…Numerous attempts to estimate the rate at which low-mass stars lose angular momentum over their lifetimes fill the literature. One approach is to use magnetic…”
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Solar Angular Momentum Loss over the Past Several Millennia by Finley, Adam J., Deshmukh, Siddhant, Matt, Sean P., Owens, Mathew, Wu, Chi-Ju

“…The Sun and Sun-like stars lose angular momentum to their magnetized stellar winds. This braking torque is coupled to the stellar magnetic field, such that…”
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Effect of Differential Rotation on the Magnetic Braking of Low-mass and Solar-like Stars: A Proof-of-concept Study by Ireland, Lewis G., Matt, Sean P., Davey, Charlie R., Harris, Owain L., Slade-Harajda, Tobias W., Finley, Adam J., Zanni, Claudio

“…Abstract On the main sequence, low-mass and solar-like stars are observed to spin down over time, and magnetized stellar winds are thought to be predominantly…”
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Estimating Magnetic Filling Factors from Zeeman-Doppler Magnetograms by See, Victor, Matt, Sean P., Folsom, Colin P., Saikia, Sudeshna Boro, Donati, Jean-Francois, Fares, Rim, Finley, Adam J., Hébrard, Élodie M., Jardine, Moira M., Jeffers, Sandra V., Lehmann, Lisa T., Marsden, Stephen C., Mengel, Matthew W., Morin, Julien, Petit, Pascal, Vidotto, Aline A., Waite, Ian A.

“…Low-mass stars are known to have magnetic fields that are believed to be of dynamo origin. Two complementary techniques are principally used to characterize…”
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Constraints on Magnetic Braking from the G8 Dwarf Stars 61 UMa and τ Cet by Metcalfe, Travis S., Strassmeier, Klaus G., Ilyin, Ilya V., van Saders, Jennifer L., Ayres, Thomas R., Finley, Adam J., Kochukhov, Oleg, Petit, Pascal, See, Victor, Stassun, Keivan G., Jeffers, Sandra V., Marsden, Stephen C., Morin, Julien, Vidotto, Aline A.

“…Abstract During the first half of their main-sequence lifetimes, stars rapidly lose angular momentum to their magnetized winds, a process known as magnetic…”
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Weakened Magnetic Braking in the Exoplanet Host Star 51 Peg by Metcalfe, Travis S., Strassmeier, Klaus G., Ilyin, Ilya V., Buzasi, Derek, Kochukhov, Oleg, Ayres, Thomas R., Basu, Sarbani, Chontos, Ashley, Finley, Adam J., See, Victor, Stassun, Keivan G., van Saders, Jennifer L., Sepulveda, Aldo G., Ricker, George R.

“…Abstract The consistently low activity level of the old solar analog 51 Peg not only facilitated the discovery of the first hot Jupiter, but also led to the…”
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A statistical evaluation of ballistic backmapping for the slow solar wind: the interplay of solar wind acceleration and corotation by Macneil, Allan R, Owens, Mathew J, Finley, Adam J, Matt, Sean P

“…ABSTRACT Mapping solar wind plasma back to its source is often achieved using the ‘two-step ballistic backmapping’ method. Solar wind observations are mapped…”
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The Effect of Magnetic Variability on Stellar Angular Momentum Loss. II. The Sun, 61 Cygni A, ϵ Eridani, ξ Bootis A, and τ Bootis A by Finley, Adam J., See, Victor, Matt, Sean P.

“…Abstract The magnetic fields of low-mass stars are observed to be variable on decadal timescales, ranging in behavior from cyclic to stochastic. The changing…”
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Parker Solar Probe observations of suprathermal electron flux enhancements originating from Coronal Hole boundaries by Macneil, Allan R, Owens, Mathew J, Berčič, Laura, Finley, Adam J

“…ABSTRACT Reconnection between pairs of solar magnetic flux elements, one open and the other a closed loop, is theorized to be a crucial process for both…”
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Magnetic and Rotational Evolution of ρ CrB from Asteroseismology with TESS by Metcalfe, Travis S., van Saders, Jennifer L., Basu, Sarbani, Buzasi, Derek, Drake, Jeremy J., Egeland, Ricky, Huber, Daniel, Saar, Steven H., Stassun, Keivan G., Ball, Warrick H., Campante, Tiago L., Finley, Adam J., Kochukhov, Oleg, Mathur, Savita, Reinhold, Timo, See, Victor, Baliunas, Sallie, Soon, Willie

“…Abstract During the first half of main-sequence lifetimes, the evolution of rotation and magnetic activity in solar-type stars appears to be strongly coupled…”
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Erratum "The Effect of Combined Magnetic Geometries on Thermally Driven Winds. II. Dipolar, Quadrupolar, and Octupolar Topologies" (2018, ApJ, 854, 78) by Finley, Adam J., Matt, Sean P.

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Kepler main-sequence solar-like stars: surface rotation and magnetic-activity evolution by Santos, Ângela R. G., Godoy-Rivera, Diego, Finley, Adam J., Mathur, Savita, García, Rafael A., Breton, Sylvain N., Broomhall, Anne-Marie

“…While the mission’s primary goal was focused on exoplanet detection and characterization, Kepler made and continues to make extraordinary advances in stellar…”
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The Effect of Magnetic Variability on Stellar Angular Momentum Loss. II. The Sun, 61 Cygni A, ϵ Eridani, Bootis A, and τ Bootis A by Finley, Adam J., See, Victor, Matt, Sean P.

“…The magnetic fields of low-mass stars are observed to be variable on decadal timescales, ranging in behavior from cyclic to stochastic. The changing strength…”
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Observations of Quiescent Solar Wind Regions with Near-f ce Wave Activity by Short, Benjamin, Malaspina, David M., Halekas, Jasper, Romeo, Orlando, Verniero, J. L., Finley, Adam J., Kasper, Justin C., Rahmati, Ali, Bale, Stuart D., Bonnell, John W., Case, Anthony W., de Wit, Thierry Dudok, Goetz, Keith, Goodrich, Katherine, Harvey, Peter R., Korreck, Kelly E., Larson, Davin, Livi, Roberto, MacDowall, Robert J., Pulupa, Marc, Stevens, Michael L., Whittlesey, Phyllis

“…Abstract In situ measurements in the near-Sun solar wind from the Parker Solar Probe have revealed the existence of quiescent solar wind regions: extended…”
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