Results 51 to 60 of about 4,353 (224)

Archaeal Tetraether Lipids as Tracers for Past Marine Environmental Change

Paleoceanography and Paleoclimatology, Volume 41, Issue 7, July 2026.
Abstract Archaea are single‐celled microorganisms that are abundant in marine environments and play a key role in the carbon and nitrogen cycles. Archaea can biosynthesize a wide variety of isoprenoid membrane lipids, including isoprenoid glycerol dibiphytanyl glycerol tetraethers (isoGDGTs).
Felix J. Elling, Gordon N. Inglis, Nina Davtian, Sarah J. Hurley, B. David A. Naafs, Lauren K. O'Connor, Richard D. Pancost, Francien Peterse, Ronnakrit Rattanasriampaipong, Addison Rice, Florence Schubotz, Jaap S. Sinninghe Damsté, Lars Wörmer, Alexandra Auderset, Kevin W. Becker, Melissa A. Berke, Peter K. Bijl, Cindy De Jonge, Liang Dong, Bella J. Duncan, Tom Dunkley Jones, Pierrick Fenies, Susanne Fietz, Sze Ling Ho, Arnaud Huguet, Carme Huguet, Jérôme Kaiser, Xiao‐Lei Liu, Gesine Mollenhauer, Sebastian Naeher, Ann Pearson, Kasia K. Śliwińska, Appy Sluijs, Claudia Sosa‐Montes de Oca, Qian Tian, Jessica E. Tierney, Devika Varma, Wenjie Xiao, Yi Ge Zhang, Xiaoxiao Zhao   +39 more
wiley   +1 more source

A puzzle involving galactic bulge microlensing events [PDF]

, 2010
We study a sample of 16 microlensed Galactic bulge main-sequence turnoff region stars for which high-dispersion spectra have been obtained with detailed abundance analyses.
Feltzing, S., Bensby, T, Judith G. Cohen, Ian B. Thompson, Gould, A, Cohen, Judith G, Feltzing, Sofia, Johnson, J.A., Martin Asplund, Thompson, A.B., Lucatello, Sara, Andrew Gould, Asplund, M., Feltzing, Sophia, Sofia Feltzing, Gould, A., Cohen, J., Johnson, Jennifer A., Bensby, T., Cohen, J.G., Thompson, Ian, Gould, Andrew, Bensby, Thomas,, Thompson, Ian B., Jorge Meléndez, Huang, W., Johnson, J., Thompson, I., Cohen, Judith G., Thomas Bensby, Huang, Wenjin, Melendez, Jorge, Sara Lucatello, Bensby, Thomas, Wenjin Huang, Asplund, Martin, Lucatello, S., Feltzing, Sofia,, Jennifer A. Johnson, Meléndez, J., Johnson, Jennifer A   +40 more
core   +1 more source

A Near-infrared Extinction and Reddening Map toward the Galactic Bulge Using UKIRT

The Astronomical Journal
The Galactic bulge is one of the most information-dense regions to study resolved stellar populations, variables, and transients, such as microlensing events.
Aiden S. Zelakiewicz, Samson A. Johnson, B. Scott Gaudi, Geoffrey Bryden, David M. Nataf, Yossi Shvartzvald   +5 more
doaj   +1 more source

Microlensing maps for the galactic bulge [PDF]

The Astrophysical Journal, 1994
Microlensing maps -- that is, contours of equal numbers of events per $10^6$ source stars -- are provided for the inner Galaxy under two alternative hypotheses : (1) the bulge is an oblate axisymmetric spheroid or (2) the bulge is a prolate bar. Oblate spheroids yield a total of $\sim 12$ events per year per $10^6$ stars at Baade's Window ($\sim 15 ...
openaire   +2 more sources

Flexural and Membrane Stresses in Doubly Curved Subducting Slabs

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract A subducting slab is a thin doubly curved shell with a complex shape that deforms in interaction with the surrounding mantle. Such a shell can deform in two distinct ways: by in‐plane stretching and shear (“membrane” deformation) and by bending and twisting (“flexural” deformation).
Gianluca Gerardi, Yida Li, Neil M. Ribe
wiley   +1 more source

A Statistical Study of Warm Plasma Cloak Particles Using Van Allen Probe Data

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The Warm Plasma Cloak (WPC) consists of ions in the inner magnetosphere with energies between 10 eV and 1 keV and showing a bidirectional pitch angle distribution of particles. These particles play an important role in wave–particle interactions and in controlling the dayside reconnection rate at the magnetopause.
Bhairavi Apte, Hyomin Kim, Konstantin Gamayunov   +2 more
wiley   +1 more source

The Galactic Bulge: A Journey from Vulcano to Elba

, 2023
<p>Invited review talk at Bulge40: The Galactic Bulge and Beyond.  The talk covers the history of contributions by the author, with emphasis on the Blanco DECam Bulge Survey</p ...
Rich, Robert Michael
core   +1 more source

Chlorination‐Enabled Oxygen Control and Dual‐Sulfur Source Aided Trap Passivation to Unlock 8.24% Efficient Sb2S3 Photovoltaic Devices

Advanced Functional Materials, Volume 36, Issue 50, 22 June 2026.
This work demonstrates a scalable, low‐temperature synthesis strategy that combines a thioacetamide (TA)‐based dual sulfur source with CdS chlorination, enabling the formation of high‐quality Sb2S3 with a reduced open‐circuit voltage loss, resulting in improved device efficiency.
Vijay C. Karade, Namuna Adhikari, Samietha S. Kumar, Alisha Adhikari, Vamsi Borra, Prabodika N. Kaluarachchi, Tingting Zhu, Tyler Brau, Rohini Kanase, Ebin Bastola, Xavier Mathew, Abasi Abudulimu, Adam B. Phillips, Michael J. Heben, Zhaoning Song, Yanfa Yan, Randy J. Ellingson   +16 more
wiley   +1 more source

Abundances of planetary nebulae in the Galactic bulge [PDF]

, 2015
Context. Planetary nebulae (PNe) abundances are poorly known for those nebulae in the Galactic bulge. This is because of the high and uneven extinction in the bulge which makes visual spectral measurements difficult.
Pottasch, S. R., Bernard-Salas, J., Pottasch, S.R., J. Bernard-Salas, S. R. Pottasch   +4 more
core   +1 more source

New Light on Dark Extended Lenses with the Roman Space Telescope

The Astrophysical Journal Letters
The Roman Space Telescope’s Galactic Bulge Time Domain Survey will constitute the most sensitive microlensing survey of the Galactic bulge to date, opening up new opportunities to search for dark matter (DM). Many extensions of the Standard Model predict
William DeRocco, Nolan Smyth, Volodymyr Takhistov   +2 more
doaj   +1 more source