Results 71 to 80 of about 24,589 (267)

Atmospheric parameters and carbon abundance for hot DB white dwarfs

, 2014
Atmospheric parameters for hot DB (helium atmosphere) white dwarfs near effective temperatures of 25000K are extremely difficult to determine from optical spectroscopy.
Gänsicke, Boris T., Koester, Detlev, Provencal, Judi   +2 more
core   +1 more source

Hunting for millimeter flares from magnetic reconnection in pre-main sequence spectroscopic binaries [PDF]

, 2010
Recent observations of the low-mass pre-main sequence, eccentric spectroscopic binaries DQ Tau and V773 Tau A reveal that their millimeter spectrum is occasionally dominated by flares from non-thermal emission processes.
A. Moór, Antonyuk, Artymowicz, Basri, Bastian, Baxter, Boden, Bower, Cargile, Choi, Covino, Covino, Covino, D. M. Salter, Damiani, Duquennoy, Dutrey, Favata, Forbrich, Forbrich, Furlan, Furuya, G. A. Blake, Getman, Getman, Getman, Ghez, Giardino, Gimenez, Güdel, Güdel, Güdel, Hirth, Hubrig, Isella, Ishihara, Jensen, Jensen, Koch, Kohler, Leinert, Luhman, M. R. Hogerheijde, Manset, Marilli, Marques, Marschall, Massi, Massi, Massi, Mathieu, Neuhaeuser, Neupert, Padgett, Prato, Preibisch, Ramírez, Reipurth, Reipurth, Salter, Salter, Simon, Simon, Stassun, Stassun, Stassun, Stine, Testa, Torres, Torres, White, Á. Kóspál   +71 more
core   +2 more sources

Using a Zero‐Strain Reference Electrode to Distinguish Anode and Cathode Volume Changes in a Solid‐State Battery

Advanced Materials Interfaces, EarlyView.
Volume changes of a solid‐state battery cell are separated into the individual contributions of anode and cathode. Simultaneously determining the “reaction volumes” of both electrodes requires a reference electrode with a pressure‐independent potential.
Mervyn Soans, Benedikt Huber, Marcel Drüschler, Dominic Bresser, Alberto Varzi, Christoffer Karlsson   +5 more
wiley   +1 more source

HST Observations of the Cataclysmic Variable Propeller LAMOST J024048.51+195226.9

The Astrophysical Journal
We present Hubble Space Telescope (HST) far-UV spectra and light curves of the magnetic cataclysmic variable (CV) LAMOST J024048.51+195226.9 (J0240), the second known CV propeller. The five consecutive HST orbits span a full 7.34 hr binary orbital period.
Jordan Tweddale, Peter Garnavich, Colin Littlefield, Paula Szkody   +3 more
doaj   +1 more source

Towards an Understanding of the Atmospheres of Cool White Dwarfs

, 2012
Cool white dwarfs with Teff < 6000 K are the remnants of the oldest stars that existed in our Galaxy. Their atmospheres, when properly characterized, can provide valuable information on white dwarf evolution and ultimately star formation through the ...
Holberg, Jay, Kowalski, Piotr M., Leggett, Sandy, Saumon, Didier   +3 more
core  

Hierarchical Multi‐Material Architectures With Gradient Design for Dynamic‐Range Flexible Tactile Sensing

Advanced Materials Technologies, EarlyView.
Hierarchical multi‐material TPMS lattices are engineered as flexible tactile sensors by combining soft and stiff elastomeric layers with a conformal conductive coating. The bilayer architecture delivers sensitivity at low pressures while maintaining a broad detectable range under large loads, enabling reliable pressure and vibration monitoring for ...
Reza Noroozi, Domenic Quiquero, Yan Yan Shery Huang, HaoTian Harvey Shi   +3 more
wiley   +1 more source

Optical Studies of Twenty Longer-Period Cataclysmic Binaries

, 2010
We obtained time-series radial velocity spectroscopy of twenty cataclysmic variable stars, with the aim of determining orbital periods P_orb. All of the stars reported here prove to have P_orb > 3.5 h.
Peters, Christopher S., Skinner, Julie N., Thorstensen, John R.   +2 more
core   +1 more source

QBP1 Peptide as a Potential Anti‐Amyloidogenic Therapy for Type 2 Diabetes: An In Vitro Study

Advanced Science, EarlyView.
The anti‐amyloidogenic peptide QBP1 effectively halts human islet amyloid polypeptide (hIAPP) aggregation, preventing the formation of toxic β‐structured intermediates. Through a combination of biophysical assays, molecular dynamics, and cell‐based studies, QBP1 is shown to preserve β‐cell viability and metabolic homeostasis, positioning it as a ...
María M. Tejero‐Ojeda, Ada Bernaus Vives, Michał Wojciechowski, Dinh Quoc Huy Pham, Mateusz Chwastyk, Mario Vallejo, Anna Novials, Douglas V. Laurents, Mariano Carrión‐Vázquez   +8 more
wiley   +1 more source

Broadband X-Ray Observations of the Periodic Optical Source ZTF J185139.81+171430.3 and Its Identification as a Massive Intermediate Polar

The Astrophysical Journal
We present X-ray observations of the periodic optical source ZTF J185139.81+171430.3 (hereafter ZTF J1851) by the XMM-Newton, NICER, and NuSTAR telescopes.
Ren Deng, Kaya Mori, Eric Miao, Gabriel Bridges, Charles J. Hailey, David A. H. Buckley, Gavin Ramsay, Dan Jarvis   +7 more
doaj   +1 more source

Carbon-rich (DQ) white dwarfs in the Sloan Digital Sky Survey

, 2019
Among the spectroscopically identified white dwarfs, a fraction smaller than 2% have spectra dominated by carbon lines, mainly molecular C2, but also in a smaller group by CI and CII lines. These are together called DQ white dwarfs.
Kepler, S. O., Koester, Detlev
core   +1 more source