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pro vyhledávání: '"ALEXANDER, J W"'
Structures in circumstellar disks such as gaps and rings are often attributed to planets. This connection has been difficult to show unequivocally, as other processes may also produce these features. Particularly, a photoelectric instability (PEI) ha
Externí odkaz:
http://arxiv.org/abs/1906.04816
Akademický článek
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Autor:
Richert, Alexander J. W., Getman, Konstantin V., Feigelson, Eric D., Kuhn, Michael A., Broos, Patrick S., Povich, Matthew S., Bate, Matthew R., Garmire, Gordon P.
Photometric detections of dust circumstellar disks around pre-main sequence (PMS) stars, coupled with estimates of stellar ages, provide constraints on the time available for planet formation. Most previous studies on disk longevity, starting with Ha
Externí odkaz:
http://arxiv.org/abs/1804.05076
Previous theoretical works have shown that in optically thin disks, dust grains are photoelectrically stripped of electrons by starlight, heating nearby gas and possibly creating a dust clumping instability, the photoelectric instability (PeI), that
Externí odkaz:
http://arxiv.org/abs/1709.07982
Autor:
Getman, Konstantin V., Broos, Patrick S., Kuhn, Michael A., Feigelson, Eric D., Richert, Alexander J. W., Ota, Yosuke, Bate, Matthew R., Garmire, Gordon P.
The Star Formation in Nearby Clouds (SFiNCs) project is aimed at providing detailed study of the young stellar populations and star cluster formation in nearby 22 star forming regions (SFRs) for comparison with our earlier MYStIX survey of richer, mo
Externí odkaz:
http://arxiv.org/abs/1612.05282
Autor:
Lyra, Wladimir, Richert, Alexander J. W., Boley, Aaron, Turner, Neal, Mac Low, Mordecai-Mark, Okuzumi, Satoshi, Flock, Mario
Recent high-resolution, near-infrared images of protoplanetary disks have shown that these disks often present spiral features. Spiral arms are among the structures predicted decades ago by numerical simulations of disk-planet interaction and thus it
Externí odkaz:
http://arxiv.org/abs/1511.02988
HST images of proplyds in the Orion Nebula, as well as submillimeter/radio measurements, show that the dominant O7 star Theta1 Ori C photoevaporates nearby disks around pre-main sequence stars. Theory predicts that massive stars photoevaporate disks
Externí odkaz:
http://arxiv.org/abs/1508.01338
Recent observations of gaps and non-axisymmetric features in the dust distributions of transition disks have been interpreted as evidence of embedded massive protoplanets. However, comparing the predictions of planet-disk interaction models to the ob
Externí odkaz:
http://arxiv.org/abs/1504.00066
Autor:
Lockwood, Alexandra C., Johnson, John A., Bender, Chad F., Carr, John S., Barman, Travis, Richert, Alexander J. W., Blake, Geoffrey A.
We use high dynamic range, high-resolution L-band spectroscopy to measure the radial velocity variations of the hot Jupiter in the tau Bootis planetary system. The detection of an exoplanet by the shift in the stellar spectrum alone provides a measur
Externí odkaz:
http://arxiv.org/abs/1402.0846
Autor:
Collins, Karen A., Eastman, Jason D., Beatty, Thomas G., Siverd, Robert J., Gaudi, B. Scott, Pepper, Joshua, Kielkopf, John F., Johnson, John Asher, Howard, Andrew W., Fischer, Debra A., Manner, Mark, Bieryla, Allyson, Latham, David W., Fulton, Benjamin J., Gregorio, Joao, Buchhave, Lars A., Jensen, Eric L. N., Stassun, Keivan G., Penev, Kaloyan, Crepp, Justin R., Hinkley, Sasha, Street, Rachel A., Cargile, Phillip, Mack, Claude E., Oberst, Thomas E., Avril, Ryan L., Mellon, Samuel N., McLeod, Kim K., Penny, Matthew T., Stefanik, Robert P., Berlind, Perry, Calkins, Michael L., Mao, Qingqing, Richert, Alexander J. W., DePoy, Darren L., Esquerdo, Gilbert A., Gould, Andrew, Marshall, Jennifer L., Oelkers, Ryan J., Pogge, Richard W., Trueblood, Mark, Trueblood, Patricia
Publikováno v:
Collins, K. A., Eastman, J. D., Beatty, T. G. et al. 2014, AJ, 147, 39
We report the discovery of KELT-6b, a mildly-inflated Saturn-mass planet transiting a metal-poor host. The initial transit signal was identified in KELT-North survey data, and the planetary nature of the occulter was established using a combination o
Externí odkaz:
http://arxiv.org/abs/1308.2296