Results 61 to 70 of about 13,894 (221)

Fundamental properties of the Population II fiducial stars HD 122563 and Gmb 1830 from CHARA interferometric observations [PDF]

, 2012
We have determined the angular diameters of two metal-poor stars, HD 122563 and Gmb 1830, using CHARA and Palomar Testbed Interferometer observations. For the giant star HD 122563, we derive an angular diameter theta_3D = 0.940 +- 0.011 milliarcseconds ...
A. Chiavassa, A. Mérand, Alexander, Allende Prieto, Alonso, Alonso, Andrievsky, B. Pichon, Barbuy, Bedding, Bigot, Bigot, Blackwell, Boyajian, Boyajian, Brown, Butler, C. Farrington, Casagrande, Chiavassa, Chiavassa, Claret, Colavita, Colavita, Collet, Coudé du Foresto, Deliyannis, Eggleton, Eggleton, F. Thévenin, G. T. van Belle, Gehren, González Hernández, Gustafsson, H. A. Mc Alister, Hanbury Brown, Hayek, Houdashelt, Huber, J. Sturmann, Johnson, Kervella, Kervella, Kervella, Kervella, King, Kjeldsen, L. Bigot, L. Sturmann, Lebreton, Luck, Mashonkina, Mashonkina, Mathur, Merle, Mishenina, Morel, Morel, Morel, Mosser, Mérand, N. Turner, O. L. Creevey, P. J. Goldfinger, P. Kervella, P. Morel, Pereira, R. Collet, Ramírez, Ramírez, Rogers, Rogers, Roxburgh, Soubiran, Spite, Stello, T. A. ten Brummelaar, T. S. Boyajian, ten Brummelaar, Thévenin, U. Heiter, V. Coudé du Foresto, van Leeuwen, Verner, Wallerstein, Wolffram, Yıldız   +86 more
core   +4 more sources

Sound Velocities and Structural Transitions of Endmember and Fe, Al, Mg, Ti‐Bearing CaSiO3 Glasses Up to 23 GPa

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract The study of silicate glasses is important to understand the physical and chemical properties of silicate melts under high‐pressure conditions relevant to planetary interiors. We conducted in situ Brillouin spectroscopy measurements on two endmember, low‐impurity CaSiO3 glasses and one Fe, Al, Mg, Ti‐bearing CaSiO3 glass up to 23 GPa.
Wenhao Su, Wen‐Yi Zhou, Jiasen Hu, Ming Hao, Anne Pommier, Jin S. Zhang   +5 more
wiley   +1 more source

Green's theorem in seismic imaging across the scales [PDF]

Solid Earth, 2019
The earthquake seismology and seismic exploration communities have developed a variety of seismic imaging methods for passive- and active-source data.
K. Wapenaar, J. Brackenhoff, J. Thorbecke   +2 more
doaj   +1 more source

Seismic Velocity Variations, Ground Deformation and the Role of Fluids During a Low‐Energy Seismic Swarm

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract On March 9th $9\mathrm{th}$, 2023, three small earthquakes (3.8≤Mw≤4.5) $(3.8\le {M}_{w}\le 4.5)$ occurred near Umbertide (Central Italy), within 4 hours. Analyzing seismic ambient noise in the frequency band 0.1–1 Hz from six seismometers within 20 km of the Mw 4.5, we detect a significant drop in seismic velocity at the time of occurrence of
Eugenio Mandler, Lucia Zaccarelli, Massimo Nespoli, Maria Elina Belardinelli, Francesco Pintori, Enrico Serpelloni, Adriano Gualandi, Lauro Chiaraluce   +7 more
wiley   +1 more source

Temporal Changes of Seismic Velocity Caused by Volcanic Activity at Mt. Etna Revealed by the Autocorrelation of Ambient Seismic Noise

Frontiers in Earth Science, 2019
On active volcanoes, ambient noise-based seismic interferometry can be a very useful monitoring tool as it allows to detect very slight variations in seismic velocity associated with magma transported toward the surface.
Raphael S. M. De Plaen, Raphael S. M. De Plaen, Andrea Cannata, Flavio Cannavo', Corentin Caudron, Thomas Lecocq, Olivier Francis   +6 more
doaj   +1 more source

Tidal Response of Seismic Wave Velocity at Shallow Crust in Japan

Geophysical Research Letters, 2023
Microcracks in geomaterials cause variations in the elastic moduli under applied strain, thereby creating seismic wave velocity variations. These are crucial for understanding the dynamic processes of the crust, such as fault‐zone damage, healing, and ...
Tomoya Takano, Kiwamu Nishida
doaj   +1 more source

Optimal combination of signals from co-located gravitational wave interferometers for use in searches for a stochastic background [PDF]

, 2004
This article derives an optimal (i.e., unbiased, minimum variance) estimator for the pseudo-detector strain for a pair of co-located gravitational wave interferometers (such as the pair of LIGO interferometers at its Hanford Observatory), allowing for ...
Albert Lazzarini, B. Allen, B. Barish, B. Caron, Bernard F. Whiting, John T. Whelan, Joseph D. Romano, K. Tsubono, Kaice Reilly, Martin McHugh, Peter Fritschel, Stan Whitcomb, Sukanta Bose, Tania Regimbau   +13 more
core   +4 more sources

Tracking Subsurface Changes via Frequency Shifts in Volcanic Tremor Spectral Lines: Observations From Mt Etna

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Episodes of volcanic tremor provide valuable insights into the dynamics of subsurface processes at active volcanoes. Previous studies have suggested that evolving tremor properties may relate to changes in the stress conditions of the plumbing system. However, a strong causative link has remained elusive.
A. S. Yates, S. Heuninck, A. Barajas, H. Bektas, C. Caudron, S. De Angelis, L. Zuccarello   +6 more
wiley   +1 more source

Evaluating Seismic Ambient Noise Techniques for Detecting Ice‐Bearing Rocks on the Moon

Earth and Space Science
One of the primary objectives of upcoming lunar missions is to locate ice‐bearing rocks at the South Pole. While evidence for their presence exists, the exact distribution and quantity remain uncertain. In this study, we evaluate the potential of seismic
S. Keil, M. Schimmel, H. Igel
doaj   +1 more source

Asteroseismic modeling of 16 Cyg A & B using the complete Kepler data set

, 2015
Asteroseismology of bright stars with well-determined properties from parallax measurements and interferometry can yield precise stellar ages and meaningful constraints on the composition. We substantiate this claim with an updated asteroseismic analysis
Creevey, Orlagh L., Davies, Guy R., Metcalfe, Travis S.   +2 more
core   +1 more source