Results 111 to 120 of about 2,000 (208)

Pinched Magnetic Fields in the High-mass Protocluster W3 IRS5

The Astrophysical Journal
We present polarization maps of dust emission at 340 GHz in the luminous high-mass protocluster W3 IRS5, observed with the Submillimeter Array. The projected magnetic fields appear fairly organized, with a pinched morphology in the northern part and a ...
Huei-Ru Vivien Chen, Qizhou Zhang, Tao-Chung Ching, H. Beuther, Kuo-Song Wang   +4 more
doaj   +1 more source

ALMAGAL

Astronomy & Astrophysics
Context. Several theoretical and observational studies have shown that new waves of triggered star formation can be induced by the feedback from newly formed massive protostars, due to the expansion of H II regions. Aims.
Mininni C., Molinari S., Kim W. J., Schisano E., Fontani F., Traficante A., Nucara A., Coletta A., Lee H. T., Sánchez-Monge Á., Benedettini M., Elia D., Pezzuto S., Pelkonen V. M., Schilke P., Battersby C., Ho P. T. P., Beltrán M. T., Beuther H., Fuller G. A., Jones B., Klessen R. S., Zhang Q., Walch S., Tang Y., Ahmadi A., Allande J., Avison A., Ballesteros-Paredes J., Bronfman L., Brogan C. L., De Angelis F., Rodrigues da Costa E., Hennebelle P., Hunter T. R., Johnston K. G., Kim K. T., Klaassen P., Kuiper R., Law C.-Y., Lis D. C., Liu S., Moscadelli L., Möller T., Rygl K. L. J., Sanhueza P., Soler J. D., Su Y. N., Testi L., van der Tak F. F. S., Zhang T., Zinnecker H., Wallace J.   +52 more
doaj   +1 more source

Virial treatment of the speed of sound in cold, dense atmospheres and application to Titan

, 2006
The speed of sound in a gas can be used to identify its composition, as has been done on the Earth. We show that, unlike in terrestrial applications, the third virial coefficient cannot be neglected in cold and dense atmospheres.
Zarnecki, J. C., Hagermann, A., Zarnecki, J.C., Hagermann, Axel   +3 more
core   +1 more source

Use of the Padé approximants for calculating the second virial coefficient

, 1981
The expansions in reduced temperature, occurring in relations for the second virial coefficient of the power-law potentials were expressed by the Pade approximant.
Jan Vosmanský, Tomáš Boublík
core   +1 more source

The Shape and Mass of the Galactic Dark Matter Halo from the Axisymmetric Jeans Model

The Astrophysical Journal
We explore the density profile, shape, and virial mass of the Milky Way’s dark matter halo, using K giants (KGs) from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope and Sloan Digital Sky Survey (SDSS)/SEGUE as well as blue horizontal ...
Lan Zhang, Xiang-Xiang Xue, Ling Zhu, Ruizhi Zhang, Chengqun Yang, Shi Shao, Jiang Chang, Feilu Wang, Hao Tian, Gang Zhao, Chao Liu   +10 more
doaj   +1 more source

Inferring the Mass Content of Galaxy Clusters with Satellite Kinematics and Jeans Anisotropic Modeling

The Astrophysical Journal
Satellite galaxies can be used to indicate the dynamic mass of galaxy groups and clusters. In this study, we apply the axisymmetric Jeans Anisotropic Multi-Gaussian Expansion ( JAM ) modeling to satellite galaxies in 28 galaxy clusters selected from the ...
Rui Shi, Wenting Wang, Zhaozhou Li, Ling Zhu, Alexander Smith, Shaun Cole, Hongyu Gao, Xiaokai Chen, Qingyang Li, Jiaxin Han   +9 more
doaj   +1 more source

Anomaly in the Virial Expansion of IAPWS-95 at Low Temperatures. [PDF]

Int J Thermophys, 2019
Harvey AH.
europepmc   +1 more source

The Virial Theorem and Covalent Bonding

, 2018
A long-held view of the origin of covalent binding is based on the notion that electrostatic forces determine the stability of a system of charged particles and that, therefore, potential energy changes drive the stabilization of molecules.
Ruedenberg, Klaus, Klaus Ruedenberg, Sture Nordholm, Bacskay, George, George B. Bacskay (2026237), Sture Nordholm (1921096), George B. Bacskay, Klaus Ruedenberg (1508833), Nordholm, Sture   +8 more
core   +1 more source

Measurement of the temperature variation of virial coefficients. I. Application to the second virial coefficient of n-butane

, 1964
An unconventional apparatus, described in detail, determines, through a measured small volume increment, the temperature dependence of the second virial coefficient of a vapour without the necessity for isothermal expansion.
GA Bottomley, TH Spurling
core   +1 more source

Exact Quantum Virial Expansion for the Optical Response of Doped Two-Dimensional Semiconductors

We present a quantum virial expansion for the optical response of a doped two-dimensional semiconductor. As we show, this constitutes a perturbatively exact theory in the high-temperature or low-doping regime, where the electrons\u27 thermal wavelength ...
Marchetti, F. M., Tiene, A., Mulkerin, B. C., Parish, M. M., Levinsen, J.   +4 more
core   +1 more source