Results 51 to 60 of about 321 (187)

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Gas accretion in disk galaxies

, 2013
Gas accretion is necessary to maintain star formation, spiral and bar structure, and secular evolution in galaxies. This can occur through tidal interaction, or mass accretion from cosmic filaments. Different processes will be reviewed to drive gas towards galaxy centers and trigger starbursts and AGN. The efficiency of these dynamical processes can be
openaire   +2 more sources

Evidence of an Untruncated Accretion Disk in the Broad-Line Radio Galaxy 4C 74.26 [PDF]

The Astrophysical Journal, 2005
4 pages, 2 figures, accepted by ApJ ...
Ballantyne, D. R., Fabian, A. C.
openaire   +2 more sources

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

In Search of Cool Flow Accretion onto Galaxies: Where Does the Disk Gas End? [PDF]

The Astrophysical Journal, 2017
Abstract The processes taking place in the outermost reaches of spiral disks (the “protodisk”) are intimately connected to the build-up of mass and angular momentum in galaxies. The thinness of spiral disks suggests that the activity is mostly quiescent, and presumably this region is fed by cool flows coming into the halo from the ...
Joss Bland-Hawthorn, Philip R. Maloney, Alex Stephens, Anna Zovaro, Attila Popping   +4 more
openaire   +2 more sources

A Face-on Accretion Disk Geometry Revealed by Millimeter-wave Periodicity in Sgr A∗

The Astrophysical Journal
We analyzed 77 epochs of Atacama Large Millimeter/submillimeter Array archival data to investigate flux variability in Sagittarius A ^∗ , the supermassive black hole at the Galactic center.
Kazuki Yanagisawa, Tomoharu Oka, Ryo Ariyama, Kazuki Yanagihara, Yuhei Iwata, Mikiya M. Takahashi   +5 more
doaj   +1 more source

Improving Cycle Life and Capacity Retention in PVMPO‖Li Dual‐Ion Lithium‐Organic Batteries Using an EC‐Free and FEC Additive Containing Electrolyte

Small Methods, Volume 10, Issue 3, 9 February 2026.
The major bottleneck of PVMPO‐based positive electrodes is electrode degradation during extended cycling with EC‐containing electrolytes. This issue is mitigated by using EC‐free electrolytes with FEC additives, which exhibit reduced interfacial resistance, fewer surface cracks, improved capacity retention, and suppressed electrode degradation, thereby
Sathiya Priya Panjalingam, Somayeh Ahadi, Jakob Michael Hesper, Uta Rodehorst, Sascha Nowak, Birgit Esser, Martin Winter, Peter Bieker   +7 more
wiley   +1 more source

Exploring the Habitability of the Outer Solar System Icy Moons for the Extremotolerant Yeast Rhodotorula frigidalcoholis

Environmental Microbiology, Volume 28, Issue 2, February 2026.
We investigated the survival of the yeast Rhodotorula frigidalcoholis and analysed its RNA after exposure to icy moon conditions. Our results show how the yeast can tolerate the extreme conditions and performs metabolic functions under the exposure conditions; for example, by halting the cell cycle in order to repair. Created in BioRender.
Tommaso Zaccaria, Xuehui He, Kristina Beblo‐Vranesevic, Mihai G. Netea, Marien I. de Jonge, Petra Rettberg   +5 more
wiley   +1 more source

AT 2020nov: Evidence for Disk Reprocessing in a Rare Tidal Disruption Event

The Astrophysical Journal
We present a detailed analysis of AT 2020nov, a tidal disruption event (TDE) in the center of its host galaxy, located at a redshift of z = 0.083. AT 2020nov exhibits unique features, including double-peaked Balmer emission lines, a broad UV/optical ...
Nicholas Earl, K. Decker French, Enrico Ramirez-Ruiz, Katie Auchettl, Sandra I. Raimundo, Kyle W. Davis, Megan Masterson, Iair Arcavi, Wenbin Lu, Vivienne F. Baldassare, David A. Coulter, Thomas de Boer, Maria R. Drout, Hannah Dykaar, Ryan J. Foley, Christa Gall, Hua Gao, Mark E. Huber, David O. Jones, Danial Langeroodi, Chien-Cheng Lin, Eugene A. Magnier, Brenna Mockler, Margaret Shepherd, Margaret E. Verrico   +24 more
doaj   +1 more source

Origins of coplanar counterrotating stellar disk components in late-type galaxies

Astronomy & Astrophysics
Context. Understanding galaxy evolution is key to explaining the structures we observe in the present-day Universe. Counterrotating stellar disks, i.e., co-spatial stellar disks rotating with opposite angular momentum, have been proposed as signatures of
Bugueño M. C., Gómez Facundo A., Dolfi Arianna, Tissera Patricia B.   +3 more
doaj   +1 more source