Zobrazeno 1 - 10
of 150
pro vyhledávání: '"SCHAEFER, G. H."'
Autor:
Tofflemire, Benjamin M., Prato, Lisa, Kraus, Adam L., Segura-Cox, Dominique, Schaefer, G. H., Akeson, Rachel, Andrews, Sean, Jensen, Eric L. N., Johns-Krull, Christopher M., Zanazzi, J. J., Simon, M.
Close binary systems present challenges to planet formation. As binary separations decrease, so too do the occurrence rates of protoplanetary disks in young systems and planets in mature systems. For systems that do retain disks, their disk masses an
Externí odkaz:
http://arxiv.org/abs/2403.13045
Autor:
Anugu, N., Baron, F., Gies, D. R., Lanthermann, C., Schaefer, G. H., Shepard, K. A., Brummelaar, T. ten, Monnier, J. D., Kraus, S., Bouquin, J. -B. Le, Davies, C. L., Ennis, J., Gardner, T., Labdon, A., Roettenbacher, R. M., Setterholm, B. R., Vollmann, W., Sigismondi, C.
The cool hypergiant star RW Cephei is currently in a deep photometric minimum that began several years ago. This event bears a strong similarity to the Great Dimming of the red supergiant Betelgeuse that occurred in 2019-2020. We present the first re
Externí odkaz:
http://arxiv.org/abs/2307.04926
Autor:
Kellogg, Kendra, Prato, L., Torres, Guillermo, Schaefer, G. H., Avilez, I., Ruíz-Rodríguez, D., Wasserman, L. H., Bonanos, Alceste Z., Guenther, E. W., Neuhäuser, R., Levine, S. E., Bosh, A. S., Morzinski, Katie M., Close, Laird, Bailey, Vanessa, Hinz, Phil, Males, Jared R.
We have characterized the spectroscopic orbit of the TWA 3A binary and provide preliminary families of probable solutions for the TWA 3A visual orbit, as well as for the wide TWA 3A-B orbit. TWA 3 is a hierarchical triple located at 34 pc in the simi
Externí odkaz:
http://hdl.handle.net/10150/625499
http://arizona.openrepository.com/arizona/handle/10150/625499
http://arizona.openrepository.com/arizona/handle/10150/625499
Autor:
Tang, Shih-Yun, Stahl, Asa G., Prato, L., Schaefer, G. H., Johns-Krull, Christopher M., Skiff, Brian A., Beichman, Charles A., Uyama, Taichi
The stellar companion to the weak-line T Tauri star DI Tau A was first discovered by the lunar occultation technique in 1989 and was subsequently confirmed by a speckle imaging observation in 1991. It has not been detected since, despite being target
Externí odkaz:
http://arxiv.org/abs/2303.11347
Autor:
Klement, R., Baade, D., Rivinius, Th., Gies, D. R., Wang, L., Labadie-Bartz, J., Santos, P. Ticiani Dos, Monnier, J. D., Carciofi, A. C., Mérand, A., Anugu, N., Schaefer, G. H., Bouquin, J. -B. Le, Davies, C. L., Ennis, J., Gardner, T., Kraus, S., Setterholm, B. R., Labdon, A.
Because many classical Be stars may owe their nature to mass and angular-momentum transfer in a close binary, the present masses, temperatures, and radii of their components are of high interest for comparison to stellar evolution models. Kappa Dra i
Externí odkaz:
http://arxiv.org/abs/2210.03090
Autor:
Klement, R., Schaefer, G. H., Gies, D. R., Wang, L., Baade, D., Rivinius, Th., Gallenne, A., Carciofi, A. C., Monnier, J. D., Mérand, A., Anugu, N., Kraus, S., Davies, C. L., Lanthermann, C., Gardner, T., Wysocki, P., Ennis, J., Labdon, A., Setterholm, B. R., Bouquin, J. Le
Classical Be stars are possible products of close binary evolution, in which the mass donor becomes a hot, stripped O or B-type subdwarf (sdO/sdB), and the mass gainer spins up and grows a disk to become a Be star. While several Be+sdO binaries have
Externí odkaz:
http://arxiv.org/abs/2112.05073
Autor:
Beck, Tracy L., Schaefer, G. H., Guilloteau, S., Simon, M., Dutrey, A., Di Folco, E., Chapillon, E.
We present a multi-wavelength analysis to reveal the nature of the enigmatic T Tauri triple star system. New optical and infrared measurements are coupled with archival X-ray, UV and mm datasets to show morphologies of disk material and outflow kinem
Externí odkaz:
http://arxiv.org/abs/2009.03861
We present results from adaptive optics imaging of the T Tauri triple system obtained at the Keck and Gemini Observatories in 2015-2019. We fit the orbital motion of T Tau Sb relative to Sa and model the astrometric motion of their center of mass rel
Externí odkaz:
http://arxiv.org/abs/2006.03183
Autor:
Gallenne, A., Kervella, P., Borgniet, S., Mérand, A., Pietrzyński, G., Gieren, W., Monnier, J. D., Schaefer, G. H., Evans, N. R., Anderson, R. I., Baron, F., Roettenbacher, R. M., Karczmarek, P.
We aim at detecting and characterizing the main-sequence companions of a sample of known and suspected Galactic binary Cepheids. We used the multi-telescope interferometric combiners MIRC and PIONIER to detect and measure the astrometric positions of
Externí odkaz:
http://arxiv.org/abs/1812.09989
Autor:
White, T. R., Huber, D., Mann, A. W., Casagrande, L., Grunblatt, S. K., Justesen, A. B., Aguirre, V. Silva, Bedding, T. R., Ireland, M. J., Schaefer, G. H., Tuthill, P. G.
Debate over the planet occurrence rates around intermediate-mass stars has hinged on the accurate determination of masses of evolved stars, and has been exacerbated by a paucity of reliable, directly-measured fundamental properties for these stars. W
Externí odkaz:
http://arxiv.org/abs/1804.05976