English
Related papers

Related papers: The Spectral Correlation Function of Molecular Clo…

200 papers

Velocity fields of molecular clouds (MCs) can provide crucial information on the merger and split between clouds, as well as their internal kinematics and maintenance, energy injection and redistribution, even star formation within clouds.…

Astrophysics of Galaxies · Physics 2024-03-12 Lixia Yuan , Ji Yang , Xuepeng Chen , Yang Su , Shaobo Zhang , Xin Zhou , Zhiwei Chen , Qing-Zeng Yan , Min Fang , Fujun Du , Yan Sun , Hongchi Wang , Ye Xu

We estimate the two-point angular correlation function (CF) of quasars from SDSS DR3 using a special method of comparison random catalog generation. The best-fit value for the CF power-law index is found to be $\alpha=0.78\pm0.18$ on the…

Astrophysics · Physics 2007-05-23 G. Yu. Ivashchenko , V. I. Zhdanov

Density functional theory (DFT) is the most widely used method for calculating molecular properties; however, its accuracy is often insufficient for quantitative predictions. Coupled-cluster (CC) theory is the most successful method for…

We present here the first stellar models on the Hertzsprung-Russell diagram (HRD), in which convection is treated according to the novel scale-free convection theory (SFC theory) by Pasetto et al. (2014). The aim is to compare the results…

Solar and Stellar Astrophysics · Physics 2016-04-27 S. Pasetto , C. Chiosi , E. Chiosi , M. Cropper , A. Weiss

The $^{13}$CO molecule is often used as a column density tracer in regions where the $^{12}$CO emission saturates. The $^{13}$CO column density is then related to that of $^{12}$CO by a uniform isotopic ratio. A similar approximation is…

Astrophysics of Galaxies · Physics 2016-04-25 László Szűcs , Simon C. O. Glover , Ralf S. Klessen

In this paper, we investigate the spectral properties of the sample canonical correlation (SCC) matrix under the alternative hypothesis to provide a more comprehensive description of the association between two sets of variables. Our…

Statistics Theory · Mathematics 2023-09-26 Xiaozhuo Zhang

The spectral form factor (SFF) plays a crucial role in revealing the statistical properties of energy level distributions in complex systems. It is one of the tools to diagnose quantum chaos and unravel the universal dynamics therein. The…

Statistical Mechanics · Physics 2024-01-17 Zhiyang Wei , Chengming Tan , Ren Zhang

We present a steady-state analytical model for pressure-regulated formation of molecular clouds (MC) and stars (SF) in gaseous galactic disks and apply it to the Milky Way (MW). MC formation depends on midplane interstellar pressure…

Astrophysics of Galaxies · Physics 2025-10-06 José Franco , Aldo Rodríguez-Puebla , Javier Ballesteros-Paredes , Manuel Zamora-Avilez

We derive the statistical limit of the spectral autocorrelation function and of the survival probability for the indirect photodissociation of molecules in the regime of non-overlapping resonances. The results are derived in the framework…

chao-dyn · Physics 2016-09-28 Y. Alhassid , Yan V. Fyodorov

The absence of self averaging in mesoscopic systems is a consequence of long-range intensity correlation. Microwave measurements suggest and diagrammatic calculations confirm that the correlation function of the normalized intensity with…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 P. Sebbah , B. Hu , A. Z. Genack , R. Pnini , B. Shapiro

The Gao-Solomon relationship between the luminosity of the HCN $J=1-0$ line and the star formation rate (SFR) is observed to remain close to linear over scales ranging from individual star-forming clumps to entire galaxies. This is widely…

Astrophysics of Galaxies · Physics 2026-03-18 F. D. Priestley , P. C. Clark , S. C. O. Glover , S. E. Ragan , S. K. Stuber , M. T. Cusack , O. Fehér , R. S. Klessen

We derive the mass function of condensations (clumps) which were formed through a turbulent cascade over a range of spatial scales $L\le20$ pc during early, predominantly turbulent evolution of a molecular cloud. The approach rests upon the…

Solar and Stellar Astrophysics · Physics 2015-06-04 Sava Donkov , Todor V. Veltchev , Ralf S. Klessen

We describe a version of an algorithm for evolving self-gravitating collections of particles that should be nearly ideal for parallel architectures. Our method is derived from the ``self-consistent field'' (SCF) approach suggested…

Astrophysics · Physics 2016-08-30 Lars Hernquist , Steinn Sigurdsson , Greg L. Bryan

We present a power spectral analysis of Spitzer images of the Large Magellanic Cloud. The power spectra of the FIR emission show two different power laws. At larger scales (kpc) the slope is ~ -1.6, while at smaller ones (tens to few…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Ivanio Puerari , David L. Block , Bruce G. Elmegreen , Frederic Bournaud

This paper presents models to estimate the structure of density and magnetic field strength in spheroidal condensations, from maps of their column density and their polarization of magnetically aligned dust grains. The density model is…

Astrophysics of Galaxies · Physics 2020-07-01 Philip C. Myers , Ian W. Stephens , Sayantan Auddy , Shantanu Basu , Tyler L. Bourke , Charles L. H. Hull

The spectral form factor (SFF) is a powerful diagnostic of random matrix behavior in quantum many-body systems. We introduce a family of random circuit ensembles whose SFFs can be computed \textit{exactly}. These ensembles describe the…

Statistical Mechanics · Physics 2025-04-24 Tatsuhiko N. Ikeda , Lev Vidmar , Michael O. Flynn

We expand our study on the dispersion of polarization angles in molecular clouds. We show how the effect of signal integration through the thickness of the cloud as well as across the area subtended by the telescope beam inherent to dust…

Astrophysics of Galaxies · Physics 2014-11-20 Martin Houde , John E. Vaillancourt , Roger H. Hildebrand , Shadi Chitsazzadeh , Larry Kirby

Understanding the role of magnetic fields in star-forming regions is of fundamental importance. In the near future, the exceptional sensitivity of SKA will offer a unique opportunity to evaluate the magnetic field strength in molecular…

High Energy Astrophysical Phenomena · Physics 2018-12-12 Marco Padovani , Daniele Galli

We report, for the first time, a multi-confocal Fluorescence Correlation Spectroscopy (mFCS) technique which allows parallel measurements at different locations, by combining a Spatial Light Modulator (SLM), with an Electron Multiplying-CCD…

Disordered and hyperuniform structures of densely packed spheres near and at jamming are characterized by vanishing of long-wavelength density fluctuations, or equivalently by long-range power-law decay of the direct correlation function…

Statistical Mechanics · Physics 2021-10-04 Hiroshi Frusawa