Results 81 to 90 of about 6,067,242 (318)

Self-rotation of emitting galaxies without dark matter

European Physical Journal C: Particles and Fields, 2021
Temporal derivatives of the attracting mass in Newton’s law of distant interactions can balance the centripetal and centrifugal accelerations for the rotating periphery of a spiral galaxy.
Igor É Bulyzhenkov
doaj   +1 more source

A study of interacting galaxies from the Arp-Madore Catalogue: Triggering of star formation and nuclear activity [PDF]

A&A 689, A312 (2024)
We present Gemini Multi-Object Spectrograph (GMOS) spectroscopic observations of 95 galaxies from the Arp & Madore (1987) catalogue of peculiar galaxies. These galaxies have been selected because they appear to be in pairs and small groups. These observations have allowed us to confirm that 60 galaxies are indeed interacting systems.
arxiv   +1 more source

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

Astronomische Nachrichten, EarlyView.
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

COSMOS-Web: The Role of Galaxy Interactions and Disk Instabilities in Producing Starbursts at z < 4

The Astrophysical Journal
We study of the role of galaxy–galaxy interactions and disk instabilities in producing starburst activity in galaxies out to z = 4. For this, we use a sample of 387 galaxies with robust total star formation rate measurements from Herschel, gas masses ...
Andreas L. Faisst, Lilan Yang, M. Brinch, C. M. Casey, N. Chartab, M. Dessauges-Zavadsky, N. E. Drakos, S. Gillman, G. Gozaliasl, C. C. Hayward, O. Ilbert, P. Jablonka, A. Kaminsky, J. S. Kartaltepe, A. M. Koekemoer, V. Kokorev, E. Lambrides, D. Liu, C. Maraston, C. L. Martin, A. Renzini, B. E. Robertson, D. B. Sanders, Z. Sattari, N. Scoville, C. M. Urry, A. P. Vijayan, J. R. Weaver, H. B. Akins, N. Allen, R. C. Arango-Toro, O. R. Cooper, M. Franco, F. Gentile, S. Harish, M. Hirschmann, A. A. Khostovan, C. Laigle, R. L. Larson, M. Lee, Z. Liu, A. S. Long, G. Magdis, R. Massey, H. J. McCracken, J. McKinney, L. Paquereau, J. Rhodes, R. M. Rich, M. Shuntov, J. D. Silverman, M. Talia, S. Toft, J. A. Zavala   +53 more
doaj   +1 more source

Galaxy and Mass Assembly (GAMA): Low-redshift Quasars and Inactive Galaxies Have Similar Neighbors

The Astrophysical Journal, 2023
We explore the properties of galaxies in the proximity (within a ∼2 Mpc radius sphere) of Type I quasars at 0.1 < z
Maria B. Stone, Clare F. Wethers, Roberto de Propris, Jari Kotilainen, Nischal Acharya, Benne W. Holwerda, Jonathan Loveday, Steven Phillipps   +7 more
doaj   +1 more source

Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter

Astronomische Nachrichten, EarlyView.
ABSTRACT Recent observational results, such as those from pulsar timing arrays (PTA), suggest a low‐frequency Gravitational Wave Background (GWB) permeates our universe. This opens the possibility that gravitational waves could span a broader spectrum, potentially impacting cosmological scales.
Edwin L. Pérez‐Ochoa, Tonatiuh Matos
wiley   +1 more source

Living with Neighbors. V. Better-aligned Spiral+Spiral Galaxy Pairs Show Stronger Star Formation

The Astrophysical Journal
Enhanced star formation (SF) with star-forming neighboring galaxies bolsters the hydrodynamical contributions during paired interactions. Although the relative spin orientation between interacting galaxies can influence this effect, it has not been ...
Woong-Bae G. Zee, Jun-Sung Moon, Sanjaya Paudel, Suk-Jin Yoon   +3 more
doaj   +1 more source

Staphylococcus Aureus AgrA Modulators from South African Antimicrobial Plants.

Chemistry &Biodiversity, Accepted Article.
South African plants are an underutilized metabolites source for novel antimicrobials targeting key quorum sensing (QS) systems like the Staphylococcus aureus AgrA. AgrA modulating metabolites constitute a new approach to reducing resistance development.
Christiana Eleojo Aruwa, Saheed Sabiu
wiley   +1 more source

All Puffed Up: Exploring Ultra-diffuse Galaxy Origins Through Galaxy Interactions

The Astronomical Journal
We present new follow-up observations of two ultra-diffuse galaxies (UDGs) selected for their distorted morphologies and tidal features, suggestive of tidal influence.
Catherine Fielder, Michael G. Jones, David J. Sand, Paul Bennet, Denija Crnojević, Ananthan Karunakaran, Burçin Mutlu-Pakdil, Kristine Spekkens   +7 more
doaj   +1 more source

Characterization of the Cubamyces menziesii terpenome

ChemBioChem, Accepted Article.
Long‐lasting polypore fungi are significant producers of terpene cyclases of high interest for medicinal or biotechnological applications. Following the 1,000 Fungal Genomes initiative launched by the Joint Genome Institute, we explored the genome of Cubamyces (C.) menziesii and identified eighteen genes encoding sesquiterpene cyclases. In a search for
Gilles Iacazio, Létitia Leydet, Julie Couillaud, Agnès Amouric, Elise Courvoisier-Dezort, Carole Avesque, Thierry Giardina, Mireille Attolini, Pierre Rousselot-Paillet, Katia Duquesne, Marie-Noelle Rosso   +10 more
wiley   +1 more source