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Exploring diverse planetary atmospheres requires modeling tools that are both accurate and flexible. Here, we develop a three-dimensional general circulation model (3D GCM) that for the first time uses a line-by-line approach to describe…

Earth and Planetary Astrophysics · Physics 2019-06-27 Feng Ding , Robin D. Wordsworth

In the recent literature on dark energy (DE) model building we have learnt that cosmologies with variable cosmological parameters can mimic more traditional DE pictures exclusively based on scalar fields (e.g. quintessence and phantom). In…

General Relativity and Quantum Cosmology · Physics 2010-11-04 Javier Grande , Joan Sola , Hrvoje Stefancic

The DENIS and 2MASS near infrared surveys are presented. Their applications in extragalactic astronomy and cosmology are listed. The prospects for a rapid spectroscopic followup survey of a near infrared selected sample of nearly $10^5$…

Astrophysics · Physics 2007-05-23 Gary Mamon

The treatment of radiation transport in global circulation models (GCMs) is crucial to correctly describe Earth and exoplanet atmospheric dynamics processes. The two-stream approximation and correlated-k method are currently…

Earth and Planetary Astrophysics · Physics 2014-05-08 David Skålid Amundsen , Isabelle Baraffe , Pascal Tremblin , James Manners , Wolfgang Hayek , N. J. Mayne , David M. Acreman

We study the topology of the matter density field in two dimensional slices, and consider how we can use the amplitude $A$ of the genus for cosmological parameter estimation. Using the latest Horizon Run 4 simulation data, we calculate the…

Cosmology and Nongalactic Astrophysics · Physics 2018-01-24 Stephen Appleby , Changbom Park , Sungwook E. Hong , Juhan Kim

The Extreme Deconvolution method fits a probability density to a dataset where each observation has Gaussian noise added with a known sample-specific covariance, originally intended for use with astronomical datasets. The existing fitting…

Machine Learning · Statistics 2019-11-27 James A. Ritchie , Iain Murray

Among dynamical modeling techniques, the made-to-measure (M2M) method for modeling steady-state systems is among the most flexible, allowing non-parametric distribution functions in complex gravitational potentials to be modeled efficiently…

Astrophysics of Galaxies · Physics 2017-11-28 Jo Bovy , Daisuke Kawata , Jason A. S. Hunt

The goodness-of-fit (GoF) of the Cosmicflows-2 (CF2) database of peculiar velocities with the LCDM standard model of cosmology is presented. Standard application of the Chi^2 statistics of the full database, of its 4,838 data points, is…

Cosmology and Nongalactic Astrophysics · Physics 2016-09-07 Yehuda Hoffman , Adi Nusser , Helene M. Courtois , R. Brent Tully

Composite of two kinds of grains is modeled in two-dimension and the elasticity is calculated using molecular dynamics method implementing Gear predictor-corrector of fifth order. It has been observed that same composite concentration can…

Soft Condensed Matter · Physics 2014-02-10 Sparisoma Viridi , Widayani , Siti Nurul Khotimah

An automated search for star clusters close to the Galactic plane (|b| < 5 deg) was carried out on the Point Source Catalogue of the DENIS survey. 44% of the Galactic plane have been observed and calibrated. The method allowed to retrieve…

Astrophysics · Physics 2009-11-07 C. Reyle , A. C. Robin

We present a mock catalog of Milky Way stars, matching in volume and depth the content of the Gaia data release 2 (GDR2). We generated our catalog using Galaxia, a tool to sample stars from a Besancon Galactic model, together with a…

Astrophysics of Galaxies · Physics 2018-06-06 Jan Rybizki , Markus Demleitner , Morgan Fouesneau , Coryn Bailer-Jones , Hans-Walter Rix , Rene Andrae

This paper provides an update on the coronal mass ejection (CME) catalog maintained at the CDAW Data Center, NASA Goddard Space Flight Center (https://cdaw.gsfc.nasa.gov/CME_list). This is version 2 (v2) of the Catalog that has been made as…

Solar and Stellar Astrophysics · Physics 2025-01-09 Nat Gopalswamy , Grzegorz Michałek , Seiji Yashiro , Pertti Mäkelä , Sachiko Akiyama , Hong Xie , Angelos Vourlidas

Atmospheric characterisation of temperate sub-Neptunes is the new frontier of exoplanetary science with recent JWST observations of possible Hycean world K2-18b. Accurate modelling of atmospheric processes is essential to interpreting…

Earth and Planetary Astrophysics · Physics 2025-02-19 Edouard F. L. Barrier , Nikku Madhusudhan

The Central Molecular Zone (CMZ), covering the inner ~1$^\circ$ of the Galactic plane has been mapped at 2 mm using the GISMO bolometric camera on the 30 m IRAM telescope. The $21''$ resolution maps show abundant emission from cold…

The dynamics and thermal structure of the surface layers of stars with outer convection zones can be studied in some detail by means of numerical simulations of time-dependent compressible convection. In an effort to investigate the…

Astrophysics · Physics 2007-05-23 Matthias Steffen

This paper reports an application of gas-kinetic BGK scheme to the computation of turbulent compressible convection in the stellar interior. After incorporating the Sub-grid Scale (SGS) turbulence model into the BGK scheme, we tested the…

Astrophysics · Physics 2016-03-07 Chun-Lin Tian , Li-Cai Deng , Kwing-Lam Chan , Da-Run Xiong

In the quest to understand the climates and atmospheres of exoplanets, 3D global climate models (GCMs) have become indispensable. The ability of GCMs to predict atmospheric conditions complements exoplanet observations, creating a feedback…

Earth and Planetary Astrophysics · Physics 2025-07-15 Thomas J. Fauchez , Geronimo L. Villanueva , Vincent Kofman , Gabriella Suissa , Ravi K. Kopparapu

We study the multi-phase circumgalactic medium (CGM) of emission line galaxies (ELGs) at $z\sim1.5$, traced by MgII$\lambda2796$, $\lambda2803$ and CIV$\lambda1548$, $\lambda1550$ absorption lines, using approximately 7,000 ELG-quasar pairs…

We provide an updated 5 $^\prime $ $\times $ 5 $^\prime $ global geoid model GGM2022, which is determined based on the shallow layer method (Shen method). First, we choose an inner surface $\Gamma$ below the EGM2008 global geoid by 15 m,…

Geophysics · Physics 2023-06-28 WenBin Shen , Youchao Xie , Jiancheng Han , Jiancheng Li
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