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Increasingly realistic simulations of the corona are used to predict synthetic observables for instruments onboard both existing and upcoming heliophysics space missions. Synthetic observables play an important role in constraining coronal…

Solar and Stellar Astrophysics · Physics 2025-01-28 Cosima Alexandra Breu , Ineke De Moortel , Hardi Peter , Sami Khan Solanki

A new window to observing individual stars and other small sources at cosmological distances was opened recently, with the detection of several caustic-crossing events in galaxy cluster fields. Many more such events are expected soon from…

Instrumentation and Methods for Astrophysics · Physics 2022-08-15 Ashish Kumar Meena , Ofir Arad , Adi Zitrin

We develop a new method to identify YSOs from star-forming regions using the photometry data from Spitzer's c2d Legacy Project. The aim is to obtain YSO lists as complete as possible for studying the statistical properties, such as Star…

Astrophysics of Galaxies · Physics 2015-06-12 Tien-Hao Hsieh , Shih-Ping Lai

Observations of clusters suffer from issues such as completeness, projection effects, resolving individual stars and extinction. As such, how accurate are measurements and conclusions are likely to be? Here, we take cluster simulations…

Solar and Stellar Astrophysics · Physics 2023-11-14 Anne S. M. Buckner , Tim Naylor , Clare L. Dobbs , Steven Rieder , Thomas J. R. Bending

The current generation of millimeter receivers is able to produce cubes of 800 000 pixels by 200 000 frequency channels to cover several square degrees over the 3 mm atmospheric window. Estimating the physical conditions of the interstellar…

The APOSTLE cosmological hydrodynamical simulation suite is a collection of twelve regions $\sim 5$ Mpc in diameter, selected to resemble the Local Group of galaxies in terms of kinematics and environment, and re-simulated at high…

Astrophysics of Galaxies · Physics 2018-08-22 Kyle A. Oman

We present the first application of the made-to-measure method for modelling dynamical systems to globular clusters. Through the made-to-measure algorithm, the masses of individual particles within a model cluster are adjusted while the…

Astrophysics of Galaxies · Physics 2023-03-29 Jeremy J. Webb , Jason A. S. Hunt , Jo Bovy

Using stellar population synthesis models to infer star formation histories (SFHs), we analyse photometry and spectroscopy of a large sample of quiescent galaxies which are members of Sunyaev-Zel'dovich (SZ)-selected galaxy clusters across…

We introduce a new 1D stellar spectral synthesis Python code called stardis. stardis is a modular, open-source radiative transfer code that is capable of spectral synthesis from near-UV to IR for FGK stars. We describe the structure,…

The code IAC-star is presented. It generates synthetic HR and color-magnitude diagrams (CMDs) and is mainly aimed to star formation history studies in nearby galaxies. Composite stellar populations are calculated on a star by star basis, by…

Astrophysics · Physics 2014-10-13 A. Aparicio , C. Gallart

Images of the eye are key in several computer vision problems, such as shape registration and gaze estimation. Recent large-scale supervised methods for these problems require time-consuming data collection and manual annotation, which can…

Computer Vision and Pattern Recognition · Computer Science 2017-02-07 Erroll Wood , Tadas Baltrusaitis , Xucong Zhang , Yusuke Sugano , Peter Robinson , Andreas Bulling

A new method, AMORE - based on a genetic algorithm optimizer, is presented for the automated study of colour-magnitude diagrams. The method combines several stellar population synthesis tools developed in the last decade by or in…

Astrophysics · Physics 2009-11-07 Y. K. Ng , E. Brogt , C. Chiosi , G. Bertelli

Buzzoni's (1989) grid of synthetic spectral energy distributions, representative of old stellar populations, was used to derive colours in different photometric systems, and to compare the theoretical predictions with the observational data…

Astrophysics · Physics 2007-05-23 S. Covino , L. E. Pasinetti Fracassini , M. L. Malagnini , A. Buzzoni

Research on young stellar populations is essential to understand the properties of embedded clusters and advance theories of their formation. This has driven advancements in methodologies for star detection, leading to the development of…

Solar and Stellar Astrophysics · Physics 2025-11-18 E. Nikoghosyan , D. Baghdasaryan , D. Andreasyan , N. Azatyan , A. Samsonyan , A. Yeghikyan

The MYStIX project (Massive Young Star-Forming Complex Study in Infrared and X-rays) provides a comparative study of 20 Galactic massive star-forming complexes (d = 0.4 to 3.6 kpc). Probable stellar members in each target complex are…

The synthpop package for R https://www.synthpop.org.uk provides tools to allow data custodians to create synthetic versions of confidential microdata that can be distributed with fewer restrictions than the original. The synthesis can be…

Computation · Statistics 2021-11-16 Gillian M Raab , Beata Nowok , Chris Dibben

Dichotomous Image Segmentation (DIS) tasks require highly precise annotations, and traditional dataset creation methods are labor intensive, costly, and require extensive domain expertise. Although using synthetic data for DIS is a…

Computer Vision and Pattern Recognition · Computer Science 2024-12-30 Haotian Qian , YD Chen , Shengtao Lou , Fahad Shahbaz Khan , Xiaogang Jin , Deng-Ping Fan

Given the ubiquity of lattice models in physics, it is imperative for researchers to possess robust methods for quantifying clusters on the lattice --- whether they be Ising spins or clumps of molecules. Inspired by biophysical studies, we…

Computational Physics · Physics 2019-07-24 Everest Law

We derived 90% confidence limits (CL) on the interstellar number density ($\rho_{IS}^{CL}$) of interstellar objects (ISO; comets and asteroids) as a function of the slope of their size-frequency distribution and limiting absolute magnitude.…

Earth and Planetary Astrophysics · Physics 2017-03-08 Toni Engelhardt , Robert Jedicke , Peter Veres , Alan Fitzsimmons , Larry Denneau , Ed Beshore , Bonnie Meinke

Observations suggest that there is a significant fraction of O-stars in the field of the Milky Way that appear to have formed in isolation or in low mass clusters ($<$100 $M_\odot$). The existence of these high-mass stars that apparently…