Results 71 to 80 of about 7,393,464 (385)

Fitting the Light Curve of 1I/‘Oumuamua with a Nonprincipal Axis Rotational Model and Outgassing Torques

The Planetary Science Journal, 2023
In this paper, we investigate the nonprincipal axis (NPA) rotational state of 1I/‘Oumuamua—the first interstellar object discovered traversing the inner solar system—from its photometric light curve.
Aster G. Taylor, Darryl Z. Seligman, Olivier R. Hainaut, Karen J. Meech   +3 more
doaj   +1 more source

Measuring the rotation period distribution of field M dwarfs with Kepler [PDF]

, 2013
We have analysed 10 months of public data from the Kepler space mission to measure rotation periods of main-sequence stars with masses between 0.3 and 0.55 M_sun.
A. McQuillan, S. Aigrain, T. Mazeh
semanticscholar   +1 more source

On the Rotation Period of (90377) Sedna

, 2005
We present precise, ~1%, r-band relative photometry of the unusual solar system object (90377) Sedna. Our data consist of 143 data points taken over eight nights in October 2004 and January 2005. The RMS variability over the longest contiguous stretch of
Gaudi, B. Scott, Hartman, Joel D., Holman, Matthew J., McLeod, Brian A., Stanek, Krzysztof Z.   +4 more
core   +1 more source

The first observed stellar occultations by the irregular satellite Phoebe (Saturn IX) and improved rotational period [PDF]

, 2019
peer reviewedWe report six stellar occultations by Phoebe (Saturn IX), an irregular satellite of Saturn, obtained between mid-2017 and mid-2019. The 2017 July 6 event was the first stellar occultation by an irregular satellite ever observed.
Assafin, Marcelo, Barry, T., Benedetti-Rossi, Gustavo, Braga-Ribas, Felipe, Camargo, J. I. B., Campbell-White, J., De Horta, A., Desmars, Josselin, Fernández-Lajús, E., Giles, D., Gomes-Júnior, A. Ramos, Hanna, W., Hayamizu, T., Hirose, T., Horvat, R., Hosoi, K., Jehin, Emmanuel, Kerr, S., Machado, D. I., Mammana, L. A., Maybour, D., Morgado, Bruno Eduardo, Owada, M., Rahvar, S., Sicardy, B., Snodgrass, C., Vieira-Martins, R.   +26 more
core   +5 more sources

Meta-analysis of Photometric and Asteroseismic Measurements of Stellar Rotation Periods: The Lomb–Scargle Periodogram, Autocorrelation Function, and Wavelet and Rotational Splitting Analysis for 92 Kepler Asteroseismic Targets

The Astrophysical Journal, 2022
We perform intensity variability analyses (photometric analyses: the Lomb–Scargle periodogram, autocorrelation, and wavelet) and asteroseismic analysis of 92 Kepler solar-like main-sequence stars to understand the reliability of the measured stellar ...
Yuting Lu, Othman Benomar, Shoya Kamiaka, Yasushi Suto   +3 more
doaj   +1 more source

The rotation period of Jupiter [PDF]

Geophysical Research Letters, 2001
The period with which radio bursts recur on Jupiter (the System III period) is defined by the IAU to be 9h 55m 29.71s based on early radio astronomical data, and is generally assumed to represent the period of rotation of the Jovian interior. A recent estimate of the System III period from radio burst data is 0.025s shorter than the IAU value.
C. T. Russell, Z. J. Yu, M. G. Kivelson
openaire   +1 more source

The solar differential rotation in the 18th century

, 2012
The sunspot drawings of Johann Staudacher of 1749--1799 were used to determine the solar differential rotation in that period. These drawings of the full disk lack any indication of their orientation.
Arlt, Arlt, Arlt, Balthasar, Benevolenskaya, Bonanno, Bushby, Chatterjee, Dikpati, Dziembowski, Frasca, Fröhlich, H.-E. Fröhlich, Komm, Korzennik, Küker, Malkus, Pizzo, R. Arlt, Ribes, Tobias, Watson   +21 more
core   +1 more source

Uranus and Neptune: Shape and Rotation [PDF]

, 2010
Both Uranus and Neptune are thought to have strong zonal winds with velocities of several hundred meters per second. These wind velocities, however, assume solid-body rotation periods based on Voyager 2 measurements of periodic variations in the planets'
Anderson, Desch, French, French, Gerald Schubert, Gurnett, Gurnett, Hammel, Hammel, Helled, Helled, Hubbard, Hubbard, John D. Anderson, Kaula, Lindal, Lindal, Lindal, Lodders, Millis, Ness, Ness, Ravit Helled, Read, Smith, Sromovsky, Stacey, Warwick, Warwick, Zharkov   +29 more
core   +1 more source

Longitudinal study on skeletal changes during and after bionator therapy using metallic implants

Brazilian Journal of Oral Sciences, 2015
Aim: To demonstrate the magnitude and direction of skeletal changes in the maxilla and mandible during and after the use of bionator, as well as their rotations.
André da Costa Monini, Luiz Gonzaga Gandini Júnior, Lídia Parsekian Martins, Dirceu Barnabé Raveli   +3 more
doaj   +1 more source

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source