Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Van Saders, Jennifer L."'
Autor:
Metcalfe, Travis S., Corsaro, Enrico, Bonanno, Alfio, Creevey, Orlagh L., van Saders, Jennifer L.
Publikováno v:
Res. Notes AAS 8, 260 (2024)
The stellar Rossby number (Ro) is a dimensionless quantity that is used in the description of fluid flows. It characterizes the relative importance of Coriolis forces on convective motions, which is central to understanding magnetic stellar evolution
Externí odkaz:
http://arxiv.org/abs/2410.08106
Autor:
Metcalfe, Travis S., van Saders, Jennifer L., Huber, Daniel, Buzasi, Derek, Garcia, Rafael A., Stassun, Keivan G., Basu, Sarbani, Breton, Sylvain N., Claytor, Zachary R., Corsaro, Enrico, Nielsen, Martin B., Ong, J. M. Joel, Saunders, Nicholas, Stokholm, Amalie, Bedding, Timothy R.
Publikováno v:
Astrophys. J. 974, 31 (2024)
The solar-type subgiant $\beta$ Hyi has long been studied as an old analog of the Sun. Although the rotation period has never been measured directly, it was estimated to be near 27 days. As a southern hemisphere target it was not monitored by long-te
Externí odkaz:
http://arxiv.org/abs/2408.05482
Autor:
Saunders, Nicholas, Grunblatt, Samuel K., Chontos, Ashley, Dai, Fei, Huber, Daniel, Zhang, Jingwen, Stefansson, Gudmundur, van Saders, Jennifer L., Winn, Joshua N., Hey, Daniel, Howard, Andrew W., Fulton, Benjamin, Isaacson, Howard, Beard, Corey, Giacalone, Steven, van Zandt, Judah, Murphey, Joseph M. Akana, Rice, Malena, Blunt, Sarah, Turtelboom, Emma, Dalba, Paul A., Lubin, Jack, Brinkman, Casey, Louden, Emma M., Page, Emma, Watkins, Cristilyn N., Collins, Karen A., Stockdale, Chris, Tan, Thiam-Guan, Schwarz, Richard P., Massey, Bob, Howell, Steve B., Vanderburg, Andrew, Ricker, George R., Jenkins, Jon M., Seager, Sara, Christiansen, Jessie L., Daylan, Tansu, Falk, Ben, Brodheim, Max, Gibson, Steven R., Hill, Grant M., Holden, Bradford, Householder, Aaron, Kaye, Stephen, Laher, Russ R., Lanclos, Kyle, Petigura, Erik A., Roy, Arpita, Rubenzahl, Ryan A., Schwab, Christian, Shaum, Abby P., Sirk, Martin M., Smith, Christopher L., Walawender, Josh, Yeh, Sherry
Publikováno v:
AJ, 168, 2 (2024)
The degree of alignment between a star's spin axis and the orbital plane of its planets (the stellar obliquity) is related to interesting and poorly understood processes that occur during planet formation and evolution. Hot Jupiters orbiting hot star
Externí odkaz:
http://arxiv.org/abs/2407.21650
Autor:
Bhalotia, Vanshree, Huber, Daniel, van Saders, Jennifer L., Metcalfe, Travis S., Stassun, Keivan G., White, Timothy R., Børsen-Koch, Víctor Aguirre, Ball, Warrick H., Basu, Sarbani, Serenelli, Aldo M., Sawczynec, Erica, Guzik, Joyce A., Howard, Andrew W., Isaacson, Howard
Stellar spin down is a critical yet poorly understood component of stellar evolution. In particular, results from the Kepler Mission imply that mature age, solar-type stars have inefficient magnetic braking, resulting in a stalled spin down rate. How
Externí odkaz:
http://arxiv.org/abs/2405.12362
Autor:
Heintz, Tyler M., Hermes, J. J., Tremblay, P. -E., Rouis, Lou Baya Ould, Redding, Joshua S., Kaiser, B. C., van Saders, Jennifer L.
White dwarf stars have been used for decades as precise and accurate age indicators. This work presents a test of the reliability of white dwarf total ages when spectroscopic observations are available. We conduct follow-up spectroscopy of 148 indivi
Externí odkaz:
http://arxiv.org/abs/2405.02423
Autor:
Chiti, Federica, van Saders, Jennifer L., Heintz, Tyler M., Hermes, J. J., Ong, J. M. Joel, Hey, Daniel R., Ramirez-Weinhouse, Michele M., Dugas, Alison
Publikováno v:
The Astrophysical Journal, Volume 977, Number 1, November 2024
Gyrochronology, a valuable tool for determining ages of low-mass stars where other techniques fail, relies on accurate calibration. We present a sample of 185 wide ($>$$100$ au) white dwarf + main sequence (WD + MS) binaries. Total ages of WDs are co
Externí odkaz:
http://arxiv.org/abs/2403.12129
Autor:
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.
Publikováno v:
Astrophys. J. 960, L6 (2024)
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 suggestion that the star could be experiencing a magnetic grand minimum. However, the 50 year time ser
Externí odkaz:
http://arxiv.org/abs/2401.01944
Autor:
Berger, Vera L., Hinkle, Jason T., Tucker, Michael A., Shappee, Benjamin J., van Saders, Jennifer L., Huber, Daniel, Reep, Jeffrey W., Sun, Xudong, Yang, Kai E.
We identify 182 flares on 158 stars within 100 pc of the Sun in both the near-ultraviolet (NUV: 1750-2750 \r{A}) and far-ultraviolet (FUV: 1350-1750 \r{A}) using high-cadence light curves from the Galaxy Evolution Explorer (GALEX). Ultraviolet (UV) e
Externí odkaz:
http://arxiv.org/abs/2312.12511
Magnetic activity is a ubiquitous feature of stars with convective outer layers, with implications from stellar evolution to planetary atmospheres. Investigating the mechanisms responsible for the observed stellar activity signals from days to billio
Externí odkaz:
http://arxiv.org/abs/2310.09515
Autor:
Saunders, Nicholas, van Saders, Jennifer L., Lyttle, Alexander J., Metcalfe, Travis S., Li, Tanda, Davies, Guy R., Hall, Oliver J., Ball, Warrick H., Townsend, Richard, Creevey, Orlagh, Dodds, Curt
Despite a growing sample of precisely measured stellar rotation periods and ages, the strength of magnetic braking and the degree of departure from standard (Skumanich-like) spindown have remained persistent questions, particularly for stars more evo
Externí odkaz:
http://arxiv.org/abs/2309.05666