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Star clusters are ideal tracers of star formation activity in systems outside the volume that can be studied using individual, resolved stars. These unresolved clusters span orders of magnitude in brightness and mass, and their formation is…

Cosmology and Nongalactic Astrophysics · Physics 2011-07-20 I. S. Konstantopoulos , K. Fedotov , S. C. Gallagher , A. Maybhate , P. R. Durrell , J. C. Charlton

Identifying galaxy groups from redshift surveys of galaxies plays an important role in connecting galaxies with the underlying dark matter distribution. Current and future high-$z$ spectroscopic surveys, usually incomplete in redshift…

Astrophysics of Galaxies · Physics 2020-10-14 Kai Wang , H. J. Mo , Cheng Li , Jiacheng Meng , Yangyao Chen

The nearby galaxies of the Local Group can act as our laboratories in helping to bridge the gap between theory and observations. In this review we will describe the complications of identifying samples of OB stars, yellow and red…

Solar and Stellar Astrophysics · Physics 2017-10-11 Philip Massey , Kathryn F. Neugent , Emily M. Levesque

We present results from our continuing program to identify new, low-mass, members of the nearby young moving groups (NYMGs) using a proper motion selection algorithm and various observational techniques. We have three goals: 1) To provide…

Solar and Stellar Astrophysics · Physics 2015-05-18 Joshua E. Schlieder , Sébastien Lépine , Michal Simon

We present a new method based on a Bayesian analysis to identify new members of nearby young kinematic groups. The analysis minimally takes into account the position, proper motion, magnitude and color of a star, but other observables can…

Solar and Stellar Astrophysics · Physics 2015-06-11 Lison Malo , René Doyon , David Lafrenière , Étienne Artigau , Jonathan Gagné , Frédérique Baron , Adric Riedel

Young associations in star forming regions are stellar systems that allow us to understand the mechanisms that characterise the stars in their early life and what happens around them. In particular, the analysis of the disks and of the…

Solar and Stellar Astrophysics · Physics 2020-10-14 D. Nardiello

The detection of communities is an important tool used to analyze the social graph of mobile phone users. Within each community, customers are susceptible of attracting new ones, retaining old ones and/or accepting new products or services…

Social and Information Networks · Computer Science 2013-11-22 Carlos Sarraute , Gervasio Calderon

We present an assessment of the performance of WISE and the AllWISE data release in a section of the Galactic Plane. We lay out an approach to increasing the reliability of point source photometry extracted from the AllWISE catalog in…

Astrophysics of Galaxies · Physics 2015-06-22 Xavier Koenig , David Leisawitz

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

Context. Generative models open up the possibility to interrogate scientific data in a more data-driven way. Aims: We propose a method that uses generative models to explore hypotheses in astrophysics and other areas. We use a neural…

Astrophysics of Galaxies · Physics 2018-12-06 Kevin Schawinski , M. Dennis Turp , Ce Zhang

Stellar population synthesis techniques for predicting the observable light emitted by a stellar population have extensive applications in numerous areas of astronomy. However, accurate predictions for small populations of young stars, such…

Astrophysics of Galaxies · Physics 2015-08-06 Mark R. Krumholz , Michele Fumagalli , Robert L. da Silva , Theodore Rendahl , Jonathan Parra

Dwarf galaxies in the Local Group provide a unique astrophysical laboratory. Despite their proximity some of these systems still lack a reliable distance determination as well as studies of their stellar content and star formation history.…

Astrophysics · Physics 2007-05-23 C. A. Goessl , J. Snigula , U. Hopp

Young Massive Clusters (YMCs) represent ideal testbeds in which to study massive stellar evolution as they contain large, coeval, chemically homogeneous, samples of massive stars. By studying YMCs with a range of ages (and hence turn-off…

Solar and Stellar Astrophysics · Physics 2009-03-06 Ben Davies

Stellar kinematic groups (SKG) are kinematically coherent groups of stars that share a common origin. We have compiled (Montes et al. 1999; 2000) a sample of late-type stars of previously established members and possible new candidates to…

Astrophysics · Physics 2016-08-30 D. Montes

Codes are crucial in many areas of applications. Different types of codes are designed to meet specific needs, which makes them more effective and useful. Linear codes are extensively used in data storage systems. Identifying codes are…

Combinatorics · Mathematics 2026-03-20 N. V. Shinde , S. A. Mane

In this work we introduce a new method to perform the identification of groups of galaxies and present results of the identification of galaxy groups in the Seventh Data Release of the Sloan Digital Sky Survey (SDSS-DR7). Our methodology…

Cosmology and Nongalactic Astrophysics · Physics 2012-03-23 J. C. Muñoz-Cuartas , Volker Mueller

The Universe at the present epoch is found to be a network of matter over-dense and under-dense regions. To date, this picture of the Universe is best revealed through cosmological large-volume simulations and large-scale galaxy redshift…

Cosmology and Nongalactic Astrophysics · Physics 2023-11-28 Prateek Gupta , Surajit Paul

The successful prediction of lensing events is a new and exciting enterprise that provides opportunities to discover and study planetary systems. The companion paper investigates the underlying theory. This paper is devoted to outlining the…

Earth and Planetary Astrophysics · Physics 2012-02-27 Rosanne Di Stefano , James Matthews , Sebastien Lepine

This paper is dedicated to investigating the kinematic properties of the Lupus moving group of young stars with the primary objective of deriving individual parallaxes for each group member. We identify those stars in the Lupus star-forming…

Astrophysics of Galaxies · Physics 2013-10-01 P. A. B. Galli , C. Bertout , R. Teixeira , C. Ducourant

The determination of stellar populations of galaxies are important for studying the formation and evolution of galaxies, because all galaxies contain many stars and they evolve with galaxies. Spectra data are usually used to determine the…

Solar and Stellar Astrophysics · Physics 2013-02-04 Zhongmu Li