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We report the results of speckle-interferometric observations of 109 high proper-motion metal-poor stars made with the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences. We resolve eight objects --…

天体物理学 · 物理学 2007-07-20 D. A. Rastegaev , Yu. Yu. Balega , E. V. Malogolovets

We have conducted a spectral line survey in the 3 mm and 2 mm bands toward two positions in a spiral arm of M51 (NGC 5194) with the IRAM 30 m telescope. In this survey, we have identified 13 molecular species, including CN, CCH, N2H+, HNCO,…

星系天体物理 · 物理学 2015-06-19 Yoshimasa Watanabe , Nami Sakai , Kazuo Sorai , Satoshi Yamamoto

Measurements are reviewed showing that the interior of the Sun, the inner planets, and ordinary meteorites consist mostly of the same elements: Iron, oxygen, nickel, silicon, magnesium, sulfur and calcium. These results do not support the…

天体物理学 · 物理学 2007-05-23 O. Manuel , Stig Friberg

We present a study of the isocyano isomers of the cyanopolyynes HC3N, HC5N, and HC7N in TMC-1 and IRC+10216 carried out with the Yebes 40m radio telescope. This study has enabled us to report the detection, for the first time in space, of…

星系天体物理 · 物理学 2020-10-07 J. Cernicharo , N. Marcelino , M. Agundez , C. Bermudez , C. Cabezas , B. Tercero , J. R. Pardo

We provide an overview of the latest advances in the study of phosphorus-rich stars, covering their detailed chemical abundance analyses and innovative mining approaches. Following the discovery of 16 low-mass and low-metallicity stars rich…

太阳与恒星天体物理 · 物理学 2025-03-06 Maren Brauner , Thomas Masseron , Marco Pignatari , D. Aníbal García-Hernández

In the companion paper it was shown that there are six observables in $gg\to t \bar t \to (b \bar b c) (\bar b \ell \bar \nu)$ that can be used to reveal the presence of new physics (NP) in $t \to b \bar b c$. In the present paper we…

高能物理 - 唯象学 · 物理学 2015-10-02 Pratishruti Saha , Ken Kiers , David London , Alejandro Szynkman

The variety of isotopes in cosmic rays allows us to study different aspects of the processes that cosmic rays undergo between the time they are produced and the time of their arrival in the heliosphere. In this paper we present measurements…

高能天体物理现象 · 物理学 2011-11-10 01 Collaboration

In an effort to further our interest in understanding basic chemistry of interstellar molecules, we carry out here an extensive investigation of the stabilities of interstellar carbon chains; Cn, H2Cn, HCnN and CnX (X=N, O, Si, S, H, P, H-,…

太阳与恒星天体物理 · 物理学 2016-12-07 Emmanuel E. Etim , Prasanta Gorai , Ankan Das , Sandip K. Chakrabarti , Elangannan Arunan

This article reviews the many new results from neutrino oscillation searches which were presented at ICHEP '98. Exciting indications of neutrino oscillations have been seen in the solar neutrino deficit, atmospheric neutrino deficit and…

高能物理 - 实验 · 物理学 2007-05-23 J. M. Conrad

We present a new catalogue of symbiotic stars. In our list we include 188 symbiotic stars as well as 28 objects suspected of being symbiotic. For each star, we present basic observational material: coordinates, V and K magnitudes,…

天体物理学 · 物理学 2009-10-31 K. Belczynski , J. Mikolajewska , U. Munari , R. J. Ivison , M. Friedjung

Superconductivity has been discovered recently in nickel based 112 infinite thin films $R_{1-x}$A$_x$NiO$_2$ ($R$ = La, Nd, Pr and A = Sr, Ca). They are isostructural to the infinite-layer cuprate (Ca,Sr)CuO$_2$ and are supposed to have a…

超导电性 · 物理学 2022-01-14 Qiangqiang Gu , Hai-Hu Wen

Recent studies suggest that metal-poor stars enhanced in carbon but containing low levels of neutron-capture elements may have been among the first to incorporate the nucleosynthesis products of the first generation of stars. We have…

太阳与恒星天体物理 · 物理学 2015-06-18 Ian U. Roederer , George W. Preston , Ian B. Thompson , Stephen A. Shectman , Chris Sneden

In this review paper we introduce at first the cage nature of diamondoid molecules, the variety of their crystalline lattice structures, the nature of their structural isomers, their stereoisomers, and their other molecular specificities.…

材料科学 · 物理学 2017-11-15 G. Ali Mansoori

Production cross sections for neutron-rich nuclei from the fragmentation of a 76Ge beam at 132 MeV/u were measured. The longitudinal momentum distributions of 34 neutron-rich isotopes of elements 13 <= Z <= 27 were scanned using a novel…

Almost all chemical elements have been made by nucleosynthetic reactions in various kind of stars and have been accumulated along our cosmic history. Among those elements, the origin of phosphorus is of extreme interest because it is known…

太阳与恒星天体物理 · 物理学 2020-08-05 T. Masseron , D. A. García-Hernández , R. Santoveña , A. Manchado , O. Zamora , M. Manteiga , C. Dafonte

Almost 200 different species have been detected in the interstellar medium (ISM) during the last decades, revealing not only simple species but complex molecules with more than 6 atoms. Other exotic compounds, like the weakly-bound dimer…

星系天体物理 · 物理学 2016-10-26 A. Potapov , A. Sanchez-Monge , P. Schilke , U. U. Graf , Th. Moeller , S. Schlemmer

Developments in neutrino astronomy have been to a great extent motivated by the search for the sources of the cosmic rays, leading at a very early stage to the concept of a cubic kilometer neutrino detector. Almost four decades later such…

高能物理 - 唯象学 · 物理学 2015-06-18 Francis Halzen

The fluxes of electrons, positrons, gammas, Cherenkov photons and muons in individual extensive air showers induced by the primary protons and helium, oxygen and iron nuclei at the level of observation have been estimated with help of the…

We report high resolution transmission electron microscopy and classical molecular dynamics simulation results of mechanically stretching copper nanowires conducting to linear atomic suspended chains (LACs) formation. In contrast with some…

材料科学 · 物理学 2013-05-29 F. Sato , A. S. Moreira , J. Bettini , P. Z. Coura , S. O. Dantas , D. Ugarte , D. S. Galvao

There is mounting evidence that ultra-energetic neutrinos of astrophysical origin may be associated with blazars. Here we investigate a unique sample of 47 blazars, $\sim 20$ of which could be new neutrino sources. In particular, we focus…

高能天体物理现象 · 物理学 2021-04-21 Simona Paiano , Renato Falomo , Aldo Treves , Paolo Padovani , Paolo Giommi , Riccardo Scarpa