Results 61 to 70 of about 74,403 (250)

A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4 [PDF]

, 2006
We present a catalog of 9316 spectroscopically confirmed white dwarfs from the Sloan Digital Sky Survey Data Release 4. We have selected the stars through photometric cuts and spectroscopic modeling, backed up by a set of visual inspections. Roughly 6000
Atsuko Nitta, Dan Long, Daniel J. Eisenstein, Donald P. Schneider, Eric H. Neilsen, Jr., Homeier D., Howard J. Brewington, Hugh C. Harris, J. Brinkmann, J. C. Barentine, James Liebert, Jurek Krzesiński, Liebert J., Marsh M. C., Michael Harvanek, Moehler S., Nicole Silvestri, S. J. Kleinman, Scott A. Anderson, Stephanie A. Snedden   +19 more
core   +2 more sources

Evidence of Resonant Mode Coupling in the Pulsating DB White Dwarf Star KIC 08626021

, 2015
The Kepler spacecraft provides new opportunities to search for long term frequency and amplitude modulations of oscillation modes in pulsating stars. We ana- lyzed nearly two years of uninterrupted data obtained with this instrument on the DBV star KIC 08626021 and found clear signatures of nonlinear resonant mode coupling af- fecting several triplets.
Zong, W., Charpinet, S., Vauclair, G.
openaire   +2 more sources

Cutaneous Melanoma Drives Metabolic Changes in the Aged Bone Marrow Immune Microenvironment

Aging and Cancer, EarlyView.
Melanoma, the deadliest form of skin cancer, increasingly affects older adults. Our study reveals that melanoma induces changes in iron and lipid levels in the bone marrow, impacting immune cell populations and increasing susceptibility to ferroptosis.
Alexis E. Carey, Murilo Ramos Rocha, Cheyenne Palm, Vania Wang, Denys Balandin, Ethan Black, Kevin Y. Zhang, Fan Huang, Daniel J. Zabransky, Yash Chhabra, Mareike Peters, Gabriel Ghiaur, Ashani Weeraratna   +12 more
wiley   +1 more source

Improved Stark-broadened Profiles for Neutral Helium Lines Using Computer Simulations

The Astrophysical Journal
The study of Stark broadening of neutral helium lines, despite significant advances over recent decades, has not led to updated large grids of helium line profiles relevant to the spectroscopic study of helium-rich stars.
Patrick Tremblay, Alain Beauchamp, Pierre Bergeron, Antoine Bédard   +3 more
doaj   +1 more source

Natural Products as Geroprotective Modulators in Diabetic Nephropathy: A Mechanistic Framework Integrating Aging Hallmarks and the AMPK–SIRT1–Nrf2 Axis

Aging and Cancer, EarlyView.
Natural products target the aging kidney in diabetic nephropathy by restoring the AMPK–SIRT1–Nrf2 axis, reducing oxidative stress, inflammation, fibrosis, and cellular senescence while enhancing mitochondrial biogenesis and antioxidant defenses.
Sherif Hamidu, Latif Adams, Eunice Ampem‐Danso, Justice Kumi, Abigail Aning, Fatima Hamidu, Mustapha Abdul Mumin Mohammed, Ayuba Nii Darku Ankrah, Seth Kwabena Amponsah   +8 more
wiley   +1 more source

Re-visiting the Canis Major star-forming region with Gaia data release 3 data

Astronomy & Astrophysics
Context. The Canis Major (CMa) star-forming region, a remote molecular cloud complex within the recently discovered Radcliffe Wave, remains under-explored in the literature. Aims.
Nogueira-Silva S., Galli P. A. B., Olivares J., Bouy H., Popowicz B. P., Merino P. M., Santos-Silva T., Gregorio-Hetem J., Miret-Roig N., Alves J.   +9 more
doaj   +1 more source

Tracking Motor Progression and Device‐Aided Therapy Eligibility in Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To characterise the progression of motor symptoms and identify eligibility for device‐aided therapies in Parkinson's disease, using both the 5‐2‐1 criteria and a refined clinical definition, while examining differences across genetic subgroups.
David Ledingham, Sahana Sathyanarayana, Charlotte B. Stewart, Robyn Iredale, Victoria Foster, Debra Galley, Mark Baker, Nicola Pavese   +7 more
wiley   +1 more source

White Dwarfs with Infrared Excess in the HET Dark Energy Experiment

The Astrophysical Journal
White dwarfs with infrared excess emission provide a window into the late stages of stellar evolution and the dynamics of circumstellar environments.
Rudy A. Morales, Barbara G. Castanheira, Jayden Blanchard, Detlev Koester, Péter Németh, S. O. Kepler, Erin Mentuch Cooper, Karl Gebhardt   +7 more
doaj   +1 more source

Lessons Learned From a Delayed‐Start Trial of Modafinil for Freezing of Gait in Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Freezing of gait (FOG) in people with Parkinson's disease (PwPD) is debilitating and has limited treatments. Modafinil modulates beta/gamma band activity in the pedunculopontine nucleus (PPN), like PPN deep brain stimulation. We therefore tested the hypothesis that Modafinil would improve FOG in PwPD.
Tuhin Virmani, Lakshmi Pillai, Reid D. Landes, Aliyah Glover, Shannon Doerhoff, Jennifer Kleiner, Mitesh Lotia, Rohit Dhall, Edgar Garcia‐Rill   +8 more
wiley   +1 more source

The Formation Rate, Mass and Luminosity Functions of DA White Dwarfs from the Palomar Green Survey

, 2004
Spectrophotometric observations at high signal-to-noise ratio were obtained of a complete sample of 347 DA white dwarfs from the Palomar Green (PG) Survey. Fits of observed Balmer lines to synthetic spectra calculated from pure-hydrogen model atmospheres
Goldschmidt P., Heber U., Homeier D., J. B. Holberg, James Liebert, Kilkenny D., Koester D., Kondo M., Marsh M. C., Marsh T. R., Napiwotzki R., Noguchi T., P. Bergeron, Pottasch S. R., Wegner G., Weidemann V., Weidemann V., Yuan J. W.   +17 more
core   +1 more source