Results 31 to 40 of about 12,196 (218)

Elucidating the Formation of Ethynylbutatrienylidene (HCCCHCCC; X1A′) in the Taurus Molecular Cloud (TMC-1) via the Gas-phase Reaction of Tricarbon (C3) with the Propargyl Radical (C3H3)

The Astrophysical Journal Letters, 2023
The recent astronomical detection of ethynylbutatrienylidene (HCCCHCCC)—a high-energy isomer of triacetylene (HCCCCCCH) and hexapentaenylidene (H _2 CCCCCC)—in TMC-1 puzzled the laboratory astrophysics community since proposed reaction pathways could not
Alexander M. Mebel, Marcelino Agúndez, José Cernicharo, Ralf I. Kaiser   +3 more
doaj   +1 more source

Magnetic field generation and diffusion by a laser-produced blast wave propagating in non-homogenous plasma

New Journal of Physics, 2015
In this paper we discuss the magnetic field self generation, via the so-called Biermann battery effect, and its diffusion for a blast wave (BW) expanding in a perturbed background medium.
A Marocchino, S Atzeni, A Schiavi
doaj   +1 more source

Double to Tenfold M-shell Photoionization of Singly Charged Lanthanum Ions

The Astrophysical Journal
Using the photon-ion merged-beams technique at the PETRA III synchrotron light source, we have measured cross sections for double and up to tenfold photoionization of La ^+ ions by a single photon in the energy range 820–1400 eV, where resonances and ...
Mirko Looshorn, B. Michel Döhring, Pierre-Michel Hillenbrand, Michael Martins, Alfred Müller, Simon Reinwardt, Jörn Seltmann, Florian Trinter, Shuxing Wang, Aloka Kumar Sahoo, Stephan Fritzsche, Stefan Schippers   +11 more
doaj   +1 more source

Detectors and Shieldings: Past and Future at LUNA

Universe
Nuclear reactions are responsible for the chemical evolution of stars, galaxies and the Universe. Unfortunately, at temperatures of interest for nuclear astrophysics, the cross-sections of the thermonuclear reactions are in the pico- femto-barn range and
Chemseddine Ananna, Lucia Barbieri, Axel Boeltzig, Matteo Campostrini, Fausto Casaburo, Alessandro Compagnucci, Laszlo Csedreki, Riccardo Maria Gesue, Jordan Marsh, Daniela Mercogliano, Denise Piatti, Duncan Robb, Ragandeep Singh Sidhu, Jakub Skowronski   +13 more
doaj   +1 more source

Nuclear astrophysics at Gran Sasso Laboratory: the LUNA experiment

EPJ Web of Conferences, 2018
LUNA is an experimental approach for the study of nuclear fusion reactions based on an underground accelerator laboratory. Aim of the experiment is the direct measurement of the cross section of nuclear reactions relevant for stellar and primordial ...
Cavanna Francesca
doaj   +1 more source

ISO and Laboratory Astrophysics [PDF]

Symposium - International Astronomical Union, 1992
ISO, the Infrared Space Observatory is capable of measuring spectra across most of the mid-infrared, the region from 4000 to 500 cm−1 (2.5-20 μm). Of these 3500 cm−1, about 670 have been inaccessible to astronomers due to strong atmospheric absorptions and about 750 cm−1 require an airborne platform, making access limited. ISO will provide high quality
openaire   +1 more source

Principal Component‐Based Classification of Blazar Candidates of Uncertain Type in the 4FGL/LAT

Astronomische Nachrichten, EarlyView.
ABSTRACT We adopted principal component analysis (PCA), linear discriminant analysis (LDA), and support vector machines (SVM), to study classification for a sample of 2708 Fermi blazars: 1142 BL Lac objects (BLLs), 759 flat spectrum radio quasars (FSRQs), and 807 blazar candidates of uncertain type (BCUs).
Wen‐Xin Yang, Guo‐Hai Chen, Jing‐Tian Zhu, Hong‐Guang Wang, Denis Bastieri, Xu‐Hong Ye, Jing‐Chao Liang, De‐Xiang Wu, Jiang‐He Yang, Anton A. Strigachev, Rumen S. Bachev, Jun‐Jie Feng, Yi Liu, Jun‐Hui Fan   +13 more
wiley   +1 more source

Advances in instrumentation for nuclear astrophysics

AIP Advances, 2014
The study of the nuclear physics properties which govern energy generation and nucleosynthesis in the astrophysical phenomena we observe in the universe is crucial to understanding how these objects behave and how the chemical history of the universe ...
S. D. Pain
doaj   +1 more source

Laboratory Astrophysics in Europe

, 2022
Europe has a broad activity in Laboratory Astrophysics, covering theory and experiment, as well initiatives promoting open science, including databases and tools aiding connection to astrophysical modelling and interpretation of observations. The talk will present some examples of Laboratory Astrophysics in Europe, as well as examples of organisation ...
Barklem, Paul, Dubernet, Marie-Lise
openaire   +2 more sources

The absence of women's scientific contributions in core UK pre‐university science qualifications

British Educational Research Journal, EarlyView.
Abstract Despite their groundbreaking contributions to our understanding of the natural world and the universe, women's roles in biology, chemistry, physics, astronomy, environmental science and geology remain largely absent from standard educational specifications in the United Kingdom (UK), particularly at Key Stage 4 (KS4) and Key Stage 5 (KS5), or ...
G. J. Cooke, S. B. White, S. Buttigieg, N. Lowson, S. Galaudage, A. Battisti, L. Kelsey, K. Ross   +7 more
wiley   +1 more source