Zobrazeno 1 - 10
of 832
pro vyhledávání: '"Laboratory astrophysics"'
Autor:
Maksim Ozhiganov, Mikhail Medvedev, Varvara Karteyeva, Ruslan Nakibov, Uliana Sapunova, Vadim Krushinsky, Ksenia Stepanova, Anastasia Tryastsina, Aleksandr Gorkovenko, Gleb Fedoseev, Anton Vasyunin
Publikováno v:
The Astrophysical Journal Letters, Vol 972, Iss 1, p L10 (2024)
Hydrogen cyanide (HCN) molecules serve as an important tracer for the chemical evolution of elemental nitrogen in the regions of star and planet formation. This is largely explained by the fact that N atoms and N _2 molecules are poorly accessible fo
Externí odkaz:
https://doaj.org/article/efbfe524122e4dec8aac84893b9e467e
Autor:
Aditya Dhariwal, Thomas H. Speak, Linshan Zeng, Amirhossein Rashidi, Brendan Moore, Olivier Berné, Anthony J. Remijan, Ilane Schroetter, Brett A. McGuire, Víctor M. Rivilla, Arnaud Belloche, Jes K. Jørgensen, Pavle Djuricanin, Takamasa Momose, Ilsa R. Cooke
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 1, p L9 (2024)
Infrared emission features toward interstellar gas of the IC 348 star cluster in Perseus have been recently proposed to originate from the amino acid tryptophan. The assignment was based on laboratory infrared spectra of tryptophan pressed into pelle
Externí odkaz:
https://doaj.org/article/f77ede8fb9aa4120abc528ba76c38660
Autor:
H. Gupta, P. B. Changala, J. Cernicharo, J. R. Pardo, M. Agúndez, C. Cabezas, B. Tercero, M. Guélin, M. C. McCarthy
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 2, p L28 (2024)
Calcium dicarbide, CaC _2 , has been characterized at high resolution in the laboratory, and its main isotopologue, ^40 CaC _2 , has been assigned to 14 rotational emission lines between 14 and 115 GHz, including 12 previously unassigned lines, in th
Externí odkaz:
https://doaj.org/article/5fb2c8a451cb45d19b35b62388fccd41
Autor:
Jianzhao Wang, Jiayong Zhong, Weiming An, Weimin Zhou, Chen Wang, Bo Zhang, Yongli Ping, Wei Sun, Xiaoxia Yuan, Pengfei Tang, Yapeng Zhang, Qian Zhang, Chunqing Xing, Zhengdong Liu, Jiacheng Yu, Jun Xiong, Shukai He, Roger Hutton, Yuqiu Gu, Gang Zhao, Jie Zhang
Publikováno v:
Frontiers in Physics, Vol 11 (2023)
Solar spicules are small-scale jet-like structures in the lower solar atmosphere. Currently, the formation of these widely distributed structures lacks a complete explanation. It is still unclear whether they play an essential role in corona heating.
Externí odkaz:
https://doaj.org/article/44e2ce8f463240d98bcaa575bc07df7f
Publikováno v:
Fundamental Plasma Physics, Vol 6, Iss , Pp 100018- (2023)
Magnetic reconnection (MR) is a fundamental process in space and laboratory plasmas. The appearance of high power lasers opens a new way to investigate MR under the relativistic condition. In this paper, relativistic collisionless MR driven by two ul
Externí odkaz:
https://doaj.org/article/9f006a735abe44b7b882cec98ae3a7c5
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 80 (2024)
Methane (CH _4 ) is one of the major components of the icy mantle of cosmic dust prevalent in cold, dense regions of interstellar media, playing an important role in the synthesis of complex organic molecules and prebiotic molecules. Solid CH _4 is c
Externí odkaz:
https://doaj.org/article/fa1a74c5757847a49e3cf31a4b37a554
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 33 (2024)
Abundance measurements for the volatile element phosphorus are important for measuring the metallicity in interstellar and circumgalactic gas, where their accuracies are limited by uncertainties in the oscillator strengths. We report updated oscillat
Externí odkaz:
https://doaj.org/article/c3b2751a0d004ab1b29f6cb23ff416c3
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 8, p 186 (2024)
Salt clouds are predicted to be common on warm exoplanets, but their optical properties are uncertain. The Exoplanet Cloud Ensemble Scattering System (ExCESS), a new apparatus to measure the scattering intensity and degree of linear polarization for
Externí odkaz:
https://doaj.org/article/2f4ef6c2e7be42e89eb83aae76eeff31
Autor:
Naoki Kimura, Yoshiki Miya, Daiki Ito, Priti, Daiji Kato, Masaaki Baba, Susumu Kuma, Toshiyuki Azuma, Nobuyuki Nakamura
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 12 (2024)
The extreme-ultraviolet emission line (424 Å) of the intercombination 1 s ^2 2 s ^2 ^1 S _0 –1 s ^2 2 s 2 p ^3 P _1 transition of Ar xv can potentially characterize the electron temperature of astrophysical plasma. Various theoretical studies have
Externí odkaz:
https://doaj.org/article/e99f00d5b76f4226b334cc18d8360146
Autor:
Laura Finazzi, Vincent J. Esposito, Julianna Palotás, Jonathan Martens, Els Peeters, Jan Cami, Giel Berden, Jos Oomens
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 168 (2024)
We report experimental values for the CH stretch frequencies of the protonated fullerenes C _60 H ^+ and C _70 H ^+ . Anharmonic frequency calculations at the B3LYP/6-31G level of theory, which are independent of empirical scaling factors, reproduce
Externí odkaz:
https://doaj.org/article/ccbcf334705f459f8c2b84faf46432fa