Results 91 to 100 of about 137,092 (301)

Warm Molecular Clouds [PDF]

Symposium - International Astronomical Union, 1992
Warm molecular gas is important in a large range of astronomical contexts. We discuss here determinations of the temperature and mass of warm material in protostellar disks and cores, photon dominated regions, and molecular material shocked by protostellar outflows. We then compare these results to heating and cooling models.
openaire   +1 more source

Atomic‐Level Ionic Displacement Polarization Enhanced Piezocatalytic Hydrogen Evolution in Covalent Organic Frameworks

Advanced Functional Materials, EarlyView.
Two isomorphic COFs were synthesized and compared, including an amphoteric COF (SQ‐TAPT) and a neutral COF (PDA‐TAPT). The ionic bonds in SQ‐TAPT introduce more Born effective charges, thereby enhancing its ionic displacement polarization. Experimental and theoretical calculations demonstrated that SQ‐TAPT exhibited higher polarity and stronger ...
Ge Yan, Xiaodong Sun, Kailai Zhang, Shuai Zhang, Haijun Hu, Hui Li, Zhenglong Li, Hongwei Huang, Liqun Ye, Jiyang Li, Yunling Liu, Hongge Pan, Tianyi Ma   +12 more
wiley   +1 more source

Large-Scale Kinematics, Astrochemistry and Magnetic Field Studies of Massive Star-forming Regions through HC3N, HNC and C2H Mappings

, 2011
We have mapped 27 massive star-forming regions associated with water masers using three dense gas tracers: HC3N 10-9, HNC 1-0 and C2H 1-0. The FWHM sizes of HNC clumps and C2H clumps are about 1.5 and 1.6 times higher than those of HC3N, respectively ...
Alfvén, Baxter, Bergin, Beuther, Blitz, Bourke, Brand, Braz, Caselli, Cesaroni, Chung, Codella, Crutcher, Crutcher, Dent, Downes, Genzel, Gwenlan, Higuchi, Hirota, Huggins, Hunter, Imara, Israel, Juan Li, Junzhi Wang, Kurtz, Kurtz, Lai, Larson, Leppänen, Liu, Mardones, Matthews, Mellema, Mellon, Mestel, Mueller, Qiusheng Gu, Quireza, Reid, Rodriguez-Franco, Rosolowsky, Sato, Shi, Shirley, Spitzer, Walsh, Wu, Xingwu Zheng, Zhang, Zheng, Zhi-yu Zhang, Zinchenko, Zinchenko   +54 more
core   +1 more source

Complexation‐Mediated Diffusion‐Limited Crystal Growth: A General Framework for Anisotropic Crystal Growth in Cu‐Based Perovskites

Advanced Functional Materials, EarlyView.
A Complexation‐Mediated Diffusion‐Limited Growth (CMDLG) framework is established to rationalize the anisotropic growth of lead‐free perovskites. Integrating coordination chemistry with mass transport kinetics, this study theoretically derives and experimentally validates that stable iodocuprate complexes induce a diffusion‐limited regime.
Hyunmin Lee, Mu Geun Son, Thanh Van Vu, Hokyeong Jeong, Joonhee Kang, Youngjong Kang   +5 more
wiley   +1 more source

On the Star Formation Rates in Molecular Clouds

, 2010
In this paper we investigate the level of star formation activity within nearby molecular clouds. We employ a uniform set of infrared extinction maps to provide accurate assessments of cloud mass and structure and compare these with inventories of young ...
Alves, João F., Lada, Charles J., Lombardi, Marco   +2 more
core   +1 more source

Cloud-to-cloud Velocity Dispersions Across a Local Arm Segment

The Astrophysical Journal
Using a large sample of 9617 molecular clouds (MCs) from the Milky Way Imaging Scroll Painting survey, we mainly measure one-dimensional cloud-to-cloud velocity dispersions across a 450 deg ^2 segment of the Local Arm in the Galactic second quadrant.
Lixia Yuan, Ji Yang
doaj   +1 more source

Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries

Advanced Functional Materials, EarlyView.
Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai, Xiaoyu Huo, Xin Long, Enkang Fu, Xusong Gong, Lei Wei, Liang An   +6 more
wiley   +1 more source

Larson's third law and the universality of molecular cloud structure

, 2010
Larson (1981) first noted a scaling relation between masses and sizes in molecular clouds that implies that these objects have approximately constant column densities.
Ballesteros-Paredes, Ballesteros-Paredes, Bohlin, C. J. Lada, Heyer, J. Alves, Jackson, Kainulainen, Kauffmann, Kegel, Kleinmann, Lada, Larson, Lilley, Lombardi, Lombardi, Lombardi, Lombardi, Lombardi, M. Lombardi, Rieke, Sanders, Savage, Solomon, Vazquez-Semadeni   +24 more
core   +1 more source

Giant Molecular Clouds in RCW 106 (G333): Galactic Mini-starbursts and Massive Star Formation Induced by Supersonic Cloud–Cloud Collisions

The Astronomical Journal
To reveal the origin of the mini-starbursts in the Milky Way, we carried out large-scale CO observations toward the RCW 106 giant molecular cloud (GMC) complex using the NANTEN2 4 m radio telescope operated by Nagoya University.
Mikito Kohno, Rin I. Yamada, Kengo Tachihara, Shinji Fujita, Rei Enokiya, Kazuki Tokuda, Asao Habe, Hidetoshi Sano, Takahiro Hayakawa, Fumika Demachi, Takuto Ito, Kisetsu Tsuge, Atsushi Nishimura, Masato I. N. Kobayashi, Hiroaki Yamamoto, Yasuo Fukui   +15 more
doaj   +1 more source

Thermodynamics of Fluid Elements in the Context of Turbulent Isothermal Self-Gravitating Molecular Clouds

Universe
In the present work, we suggest a new approach for studying the equilibrium states of an hydrodynamic isothermal turbulent self-gravitating system as a statistical model for a molecular cloud. The main hypothesis is that the local turbulent motion of the
Sava Donkov, Ivan Zh. Stefanov, Valentin Kopchev   +2 more
doaj   +1 more source