Constraints on Magnetic Braking from the G8 Dwarf Stars 61 UMa and τ Cet by Travis S. Metcalfe, Klaus G. Strassmeier, Ilya V. Ilyin, Jennifer L. van Saders, Thomas R. Ayres, Adam J. Finley, Oleg Kochukhov, Pascal Petit, Victor See, Keivan G. Stassun, Sandra V. Jeffers, Stephen C. Marsden, Julien Morin, Aline A. Vidotto

“…We estimate mass-loss rates using archival X-ray observations and inferences from Ly α measurements, and we adopt other stellar properties from asteroseismology and spectral energy distribution fitting. …”
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First Observations of the Brown Dwarf HD 19467 B with JWST by Alexandra Z. Greenbaum, Jorge Llop-Sayson, Ben W.P. Lew, Geoffrey Bryden, Thomas L. Roellig, Marie Ygouf, B. J. Fulton, Daniel R. Hey, Daniel Huber, Sagnick Mukherjee, Michael Meyer, Jarron Leisenring, Marcia Rieke, Martha Boyer, Joseph J. Green, Doug Kelly, Karl Misselt, Eugene Serabyn, John Stansberry, Laurie E. U. Chu, Matthew De Furio, Doug Johnstone, Joshua E. Schlieder, Charles Beichman

“…Using an age of 9.4 ± 0.9 Gyr inferred from spectroscopy, Gaia astrometry, and TESS asteroseismology, we obtain a model-derived mass of 62 ± 1 M _J , which is consistent within 2 σ with the dynamically derived mass of ${81}_{-12}^{+14}$ M _J .…”
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PG 1605+072 in Wet XCov22: Support for the Multi Site Spectroscopic Telescope by Schuh S. L., Heber U., Dreizler S., O’Toole S., Jeffery C. S., Falter S., Woolf V.M., Riddle R. L., Handler G., Hürkal Ö., Pakštiene E., Klumpe E.W., Laurance T., Vuckovic M., Zoła S., Kawaler S. D., Kanaan A., Monteiro H., Giovannini O., Kepler S. O., Mukadam A., Provencal J.L., Nitta A., Shipman H., Mullally F., Grauer A., Wood M.A., Bradley P.A., Kilic M., Sekiguchi K., Crowe R., Sullivan D. J., Rosen R., Clemens C., Xiaojun J., Janulis R., O’Donoghue D., Ogloza W., Baran A., Silvotti R., Marinoni S., Vauclair G., Dolez N., Chevreton M., Deetjen J. L., Nagel T., Pérez J.M. González, Solheim J.-E., Østensen R., Ulla A., Burleigh M., Good S., Metcalfe T. S., Costa A. F.M. da, Costa J. E. S., O’Brien M.S., Kim S.-L., Lee H., Sergeev A., Akan C., Cakirli Ö., Paparo M., Viraghalmy G.

“…This constitutes an enormous observational effort, but in return promises to finally provide access to a mode identification for and an asteroseismological analysis of the pulsating sdB star PG 1605+072. …”
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Age Determination of LAMOST Red Giant Branch Stars Based on the Gradient Boosting Decision Tree Method by Hai-Feng Wang, Giovanni Carraro, Xin Li, Qi-Da Li, Lorenzo Spina, Li Chen, Guan-Yu Wang, Li-Cai Deng

“…We used 2643 RGB stars extracted from the APOKASC-2 asteroseismological catalog as the training data set. After selecting the parameters ([ α /Fe], [C/Fe], T _eff , [N/Fe], [C/H], log g ) highly correlated with age using GBDT, we apply the same GBDT method to the new catalog of more than 590,000 stars classified as RGB stars. …”
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