Results 131 to 140 of about 17,021 (292)

DDO 68-C: HST Confirms Yet Another Companion of the Isolated Dwarf Galaxy DDO 68

The Astrophysical Journal
We present the results of deep Hubble Space Telescope photometry of the dwarf galaxy DDO 68-C, proposed as possibly associated with the isolated peculiar dwarf DDO 68.
Matteo Correnti, Francesca Annibali, Michele Bellazzini, Mariarosa Marinelli, Alessandra Aloisi, Michele Cignoni, Monica Tosi, Raffaele Pascale, John M. Cannon, Lila Schisgal, Leslie K. Hunt, Elena Sacchi, Sangmo Tony Sohn   +12 more
doaj   +1 more source

Tidal Interaction of Galaxies

The Astrophysical Journal Supplement Series, 1978
In this paper we investigate the effect of weak tidal interactions among galaxies in clusters. We obtain the Fokker-Planck coefficients for this process by making use of the impulse approximation. We assume that the outer regions of a galaxy are well described by isotropically distributed stellar orbits with small angular momenta.
openaire   +1 more source

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

Raman analysis of organic refractory materials after energetic processing: Evidence for amorphous carbon on TNOs and comets

Meteoritics &Planetary Science, EarlyView.
Abstract Amorphous carbon (αC) is found in various extraterrestrial particles, including those thought to originate from the outer Solar System. αC can form through two main processes involving C‐rich materials: exposure to energetic charged particles and thermal processing.
M. Germanà, A. Vyjidak, G. A. Baratta, B. M. Giuliano, R. G. Urso, C. Scirè, D. Fulvio, T. Grassi, P. Jusko, P. Caselli, M. E. Palumbo   +10 more
wiley   +1 more source

Nanoscale space weathering features in mature lunar soil revealed by TEM and APT

Meteoritics &Planetary Science, EarlyView.
Abstract Space weathering significantly alters the optical, chemical, and structural properties of lunar regolith at micro‐ and nanoscales; yet detailed nanoscale variability within individual soils remains underexplored. Here we apply transmission electron microscopy (TEM) and atom probe tomography to four mineral grains (olivine, ilmenite, and two ...
Jennika Greer, Alexander M. Kling, Luke Daly, Dieter Isheim, David N. Seidman, Michelle S. Thompson, Philipp R. Heck   +6 more
wiley   +1 more source

Warped Disk Galaxies. II. From the Cosmic Web to the Galactic Warp

The Astrophysical Journal
Galactic warps are common in disk galaxies. While often attributed to galaxy–galaxy tides, a nonspherical dark matter halo has also been proposed as a driver of disk warping.
Woong-Bae G. Zee, S. Lyla Jung, Sanjaya Paudel, Suk-Jin Yoon   +3 more
doaj   +1 more source

Caught in the web: Galaxy mergers along cosmic filaments

Astronomy & Astrophysics
Context. Galaxy clusters grow through the accretion of galaxies from groups, filaments, and other clusters. During this process, galaxies may undergo pre-processing in lower density environments, where galaxy–galaxy mergers and other interactions can ...
Dulcien Carolina, Jaffé Yara L., Crossett Jacob P., Baier-Soto Raúl, Méndez-Hernández Hugo, Haines Christopher P., Cabrera-Vives Guillermo, Olivares Patricio, Vásquez-Bustos Paulo, Argudo-Fernández Maria, Vivanco Javiera, Bilton Lawrence, Bom Clécio R., D’Ago Giuseppe, Finoguenov Alexis, Kuchner Ulrike, Lima-Dias Ciria, Merluzzi Paola, Monachesi Antonela, Pallero Diego, Tejos Nicolas, Teixeira Gabriel S. M., Sifón Cristóbal, Carvalho Maiara S., Demarco Ricardo, Ibar Eduardo, Montaguth Gissel P., Piraino-Cerda Franco, Rescigno Umberto, Sampaio Vitor, Oliveira Schwarz Gustavo B., Smith Rory, Vulcani Benedetta, Malavasi Nicola   +33 more
doaj   +1 more source

Dynamics of Galaxy Interactions [PDF]

, 1998
This review briefly and very informally summarizes some of my ongoing research. One unifying theme in my work is the use of computers to bridge the gap between human and astronomical time-scales. Galactic collisions are an example; the dynamics of interacting galaxies can be visualized with numerical simulations.
openaire   +1 more source

The evolution of dark matter substructure [PDF]

, 2001
This thesis investigates the dynamical evolution of systems orbiting within deeper potentials. Initially we use a simple satellite-halo interaction to study the dynamical processes that act on orbiting systems and we compare these results to analytical ...
Roldán, Carlos Antonio Calcáneo
core  

The SVP–FRO6 Module Integrates the Control of Leaf Senescence and Flowering in Arabidopsis

Plant, Cell &Environment, EarlyView.
ABSTRACT Plants coordinate major developmental transitions by integrating intrinsic genetic programs with environmental signals, where nutrient availability serves as a critical external factor shaping growth and fitness. Iron (Fe), an essential micronutrient for cellular respiration and photosynthesis, is strictly regulated through sophisticated ...
Hyunsu Park, Yeong Seon Yoon, Sanghoon Park, Ukcheol Jeong, Hyeyoung Choi, Hyunwoo Oh, Dovran Shamamedov, Zhonghai Li, Hye Ryun Woo   +8 more
wiley   +1 more source