Results 61 to 70 of about 48,249 (220)

Evidence for Large-scale, Rapid Gas Inflows in z ∼ 2 Star-forming Disks

The Astrophysical Journal, 2023
We report high-quality H α /CO imaging spectroscopy of nine massive (log median stellar mass = 10.65 M _⊙ ) disk galaxies on the star-forming main sequence (henceforth SFGs), near the peak of cosmic galaxy evolution ( z ∼ 1.1–2.5), taken with the ESO ...
R. Genzel, J.-B. Jolly, D. Liu, S. H. Price, L. L. Lee, N. M. Förster Schreiber, L. J. Tacconi, R. Herrera-Camus, C. Barfety, A. Burkert, Y. Cao, R. I. Davies, A. Dekel, M. M. Lee, D. Lutz, T. Naab, R. Neri, A. Nestor Shachar, S. Pastras, C. Pulsoni, A. Renzini, K. Schuster, T. T. Shimizu, F. Stanley, A. Sternberg, H. Übler   +25 more
doaj   +1 more source

Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy‐Ion Collisions

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Vector U‐bosons, often referred to as “dark photons,” are potential candidates for mediating dark matter interactions. In this study, we outline a procedure to derive theoretical constraints on the upper bound of the kinetic mixing parameter ϵ2MU$$ {\upvarepsilon}^2\left({M}_U\right) $$ using dilepton data from heavy‐ion from SIS to RHIC ...
Adrian William Romero Jorge, Elena Bratkovskaya, Taesoo Song, Laura Sagunski   +3 more
wiley   +1 more source

The Hubble sequence: just a vestige of merger events? [PDF]

, 2009
Abr: We investigate whether the Hubble sequence can be reproduced by the relics of merger events. We verify that, at zmed=0.65, the abundant population of anomalous starbursts is mainly linked to the local spirals.
Alonso-Herrero, Barnes, Barnes, Barnes, Bell, Bell, Berentzen, Brinchmann, Brown, Bruzual, Carignan, Conselice, Conselice, Davidge, Davies, Dekel, Donner, E. Athanassoula, Eggen, Erb, F. Hammer, Fall, Flores, Gao, Gerin, Goldreich, Goldreich, Governato, H. Flores, Hammer, Hammer, Hammer, Hammer, Hammer, Heckman, Hopkins, Hopkins, Hopkins, Ibata, Jiang, Jogee, Kennicutt, Kroupa, Liang, Lilly, Lotz, Lotz, M. Puech, M. Rodrigues, Maller, Maller, Maraston, Marcillac, Mo, Mouhcine, Nakamura, Neff, Neichel, Noguchi, Peebles, Peirani, Poggianti, Puech, Puech, Puech, Puech, Puech, R. Delgado, Ravikumar, Rawat, Rawat, Robaina, Robertson, Rodrigues, Ryan, Schiminovich, Sheth, Silk, Springel, Springel, Steinmetz, Steinmetz, Stewart, Toomre, Toth, Tutukov, van den Bergh, Van den Bergh, White, Y. B. Yang, Yang, Yang, Zheng   +92 more
core   +2 more sources

The Strength of Bisymmetric Modes in SDSS-IV/MaNGA Barred Galaxy Kinematics

The Astrophysical Journal
The Sloan Digital Sky Survey-IV/Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) Survey data provide an unprecedented opportunity to study the internal motions of galaxies and, in particular, represent the largest sample of barred galaxy ...
Brian DiGiorgio Zanger, Kyle B. Westfall, Kevin Bundy, Niv Drory, Matthew A. Bershady, Stephanie Campbell, Anne-Marie Weijmans, Karen L. Masters, David Stark, David Law   +9 more
doaj   +1 more source

Stochastic Quantum Mechanics in Curved Spaces: Application to Schwarzschild Black Holes

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT In this work, we start from the hypothesis that the universe lives in a Gravitational Wave Background (GWB). From this hypothesis, it follows that space–time is not locally flat because we have to take into account the fluctuations of the GWB in space–time. This implies that sufficiently small particles will feel these oscillations, preventing
Juan S. Jerez‐Rodriguez, Tonatiuh Matos   +1 more
wiley   +1 more source

Closing the Gap between Observed Low-mass Galaxy H i Kinematics and Cold Dark Matter Predictions

The Astrophysical Journal
Testing the standard cosmological model (ΛCDM) at small scales is challenging. Galaxies that inhabit low-mass dark matter halos provide an ideal test bed for dark matter models by linking observational properties of galaxies at small scales (low mass ...
Amy Sardone, Annika H. G. Peter, Alyson M. Brooks, Jane Kaczmarek   +3 more
doaj   +1 more source

JWST Imaging of the Closest Globular Clusters—V. The White Dwarfs Cooling Sequence of M4

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT We combine infrared (IR) observations collected by the James Webb Space Telescope with optical deep images by the Hubble Space Telescope taken ~20 years earlier to compute proper‐motion membership for the globular cluster (GC) M4 (NGC 6121) along its entire white dwarf (WD) cooling sequence (CS).
Luigi R. Bedin, Mattia Libralato, Maurizio Salaris, Domenico Nardiello, Michele Scalco, Massimo Griggio, Jay Anderson, Pierre Bergeron, Andrea Bellini, Roman Gerasimov, Adam J. Burgasser, Daniel Apai   +11 more
wiley   +1 more source

Revisiting Variable Stars Near Globular Clusters South of −29° Declination

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT We review an often‐cited but seldom‐accessed catalogue by Fourcade and Laborde (1966) of 785 variable stars near 47 southern Galactic globular clusters, and recover the locations of 85 stars that were not incorporated into subsequent variable star catalogues and hence have become “lost” to the literature.
Andrew C. Layden, Julia Evangelista, Sakshi Gupta, Mithilesh Mittameda, Eva Mulloy, Sohan I. Muslim, Tiyinoluwa Olushola‐Alao, Akul Rishi   +7 more
wiley   +1 more source

Exploration of Halo Substructures in Integrals-of-motion Space with Gaia Data Release 3

The Astrophysical Journal
Using kinematic data from the Gaia Data Release 3 catalog, along with metallicity estimates robustly derived from Gaia BP/RP spectra, we have explored the Galactic stellar halo in search of both known and potentially new substructures.
Haoyang Liu, Cuihua Du, Dashuang Ye, Jian Zhang, Mingji Deng   +4 more
doaj   +1 more source

White Dwarf Stars in the Big Data Era

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT White dwarf stars are the most common endpoint of stellar evolution. Therefore, these old, numerous and compact objects provide valuable information on the late stages of stellar evolution, the physics of dense plasma and the structure and evolution of our Galaxy.
Maria Camisassa
wiley   +1 more source