Zobrazeno 1 - 10
of 306
pro vyhledávání: '"Strassmeier, Klaus G"'
Autor:
Asnodkar, Anusha Pai, Wang, Ji, Broome, Madelyn, Huang, Chenliang, Johnson, Marshall C., Ilyin, Ilya, Strassmeier, Klaus G., Jensen, Adam
WASP-12 b is an ultra-hot Jupiter (UHJ) of special interest for atmospheric studies since it is on an inspiraling orbit in an extreme environment of intense radiation and circumstellar gas. Previously claimed detections of active mass loss from this
Externí odkaz:
http://arxiv.org/abs/2410.21493
Autor:
MacLeod, Morgan, Blunt, Sarah, De Rosa, Robert J., Dupree, Andrea K., Granzer, Thomas, Harper, Graham M., Huang, Caroline D., Leiner, Emily M., Loeb, Abraham, Nielsen, Eric L., Strassmeier, Klaus G., Wang, Jason J., Weber, Michael
We examine a century of radial velocity, visual magnitude, and astrometric observations of the nearest red supergiant, Betelgeuse, in order to reexamine the century-old assertion that Betelgeuse might be a spectroscopic binary. These data reveal Bete
Externí odkaz:
http://arxiv.org/abs/2409.11332
Autor:
Shields, Joseph C., Chu, Jason, Conrad, Albert, Crass, Jonathan, Crepp, Justin R., Ertel, Steve, Farinato, Jacopo, Ilyin, Ilya, Kuhn, Olga, Marafatto, Luca, Pedichini, Fernando, Piazzesi, Roberto, Pogge, Richard W., Power, Jennifer, Ragland, Sam, Reynolds, Robert, Riedl, James, Smithwright, Mark, Strassmeier, Klaus G., Thompson, David
The Large Binocular Telescope, with its expansive collecting area, angular resolving power, and advanced optical design, provides a robust platform for development and operation of advanced instrumentation for astronomical research. The LBT currently
Externí odkaz:
http://arxiv.org/abs/2407.10871
Autor:
Petz, Sydney, Johnson, Marshall C., Asnodkar, Anusha Pai, Duck, Alison, Wang, Ji, Ilyin, Ilya, Strassmeier, Klaus G.
We present high-resolution optical emission spectroscopy observations of the ultra hot Jupiters (UHJs) TOI-1431 b and TOI-1518 b using the PEPSI spectrograph on the LBT. We detect emission lines from Fe I with a significance of 5.40$\sigma$ and 7.85$
Externí odkaz:
http://arxiv.org/abs/2407.09643
Autor:
Sutlieff, Ben J., Birkby, Jayne L., Stone, Jordan M., Derkink, Annelotte, Backs, Frank, Doelman, David S., Kenworthy, Matthew A., Bohn, Alexander J., Ertel, Steve, Snik, Frans, Woodward, Charles E., Ilyin, Ilya, Skemer, Andrew J., Leisenring, Jarron M., Strassmeier, Klaus G., Wang, Ji, Charbonneau, David, Biller, Beth A.
The time variability and spectra of directly imaged companions provide insight into their physical properties and atmospheric dynamics. We present follow-up R~40 spectrophotometric monitoring of red companion HD 1160 B at 2.8-4.2 $\mu$m using the dou
Externí odkaz:
http://arxiv.org/abs/2405.12271
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:
Jadlovský, Daniel, Granzer, Thomas, Weber, Michael, Kravchenko, Kateryna, Krtička, Jiří, Dupree, Andrea K., Chiavassa, Andrea, Strassmeier, Klaus G., Poppenhäger, Katja
Publikováno v:
A&A 685, A124 (2024)
Betelgeuse, a red supergiant star of semi-regular variability, reached a historical minimum brightness in February 2020, known as the Great Dimming. Even though the brightness has returned to the values prior to the Great Dimming now, it continues to
Externí odkaz:
http://arxiv.org/abs/2312.02816
Autor:
Petz, Sydney, Johnson, Marshall C., Asnodkar, Anusha Pai, Wang, Ji, Gaudi, B. Scott, Henning, Thomas, Keles, Engin, Molaverdikhani, Karan, Poppenhaeger, Katja, Scandariato, Gaetano, Shkolnik, Evgenya K., Sicilia, Daniela, Strassmeier, Klaus G., Yan, Fei
Most ultra hot Jupiters (UHJs) show evidence of temperature inversions, in which temperature increases with altitude over a range of pressures. Temperature inversions can occur when there is a species that absorbs the stellar irradiation at a relativ
Externí odkaz:
http://arxiv.org/abs/2310.09352
Autor:
Metcalfe, Travis S., Buzasi, Derek, Huber, Daniel, Pinsonneault, Marc H., van Saders, Jennifer L., Ayres, Thomas R., Basu, Sarbani, Drake, Jeremy J., Egeland, Ricky, Kochukhov, Oleg, Petit, Pascal, Saar, Steven H., See, Victor, Stassun, Keivan G., Li, Yaguang, Bedding, Timothy R., Breton, Sylvain N., Finley, Adam J., Garcia, Rafael A., Kjeldsen, Hans, Nielsen, Martin B., Ong, J. M. Joel, Rorsted, Jakob L., Stokholm, Amalie, Winther, Mark L., Clark, Catherine A., Godoy-Rivera, Diego, Ilyin, Ilya V., Strassmeier, Klaus G., Jeffers, Sandra V., Marsden, Stephen C., Vidotto, Aline A., Baliunas, Sallie, Soon, Willie
Publikováno v:
Astron. J. 166, 167 (2023)
The bright star $\lambda$ Ser hosts a hot Neptune with a minimum mass of 13.6 $M_\oplus$ and a 15.5 day orbit. It also appears to be a solar analog, with a mean rotation period of 25.8 days and surface differential rotation very similar to the Sun. W
Externí odkaz:
http://arxiv.org/abs/2308.09808
Autor:
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.
Publikováno v:
Astrophys. J. 948, L6 (2023)
During the first half of their main-sequence lifetimes, stars rapidly lose angular momentum to their magnetized winds, a process known as magnetic braking. Recent observations suggest a substantial decrease in the magnetic braking efficiency when sta
Externí odkaz:
http://arxiv.org/abs/2304.09896