Download Shareware and Freeware Software for Windows, Linux, Macintosh, PDA

line Home  |  About Us  |  Link To Us  |  FAQ  |  Contact

Serving Software Downloads in 976 Categories, Downloaded 29.545.319 Times

Shapley's Globular Clusters 1.0

Company: Todd Timberlake
Date Added: August 28, 2013  |  Visits: 203

Shapley's Globular Clusters

Report Broken Link
Printer Friendly Version


Product Homepage
Download (17 downloads)



The EJS Shapley's Globular Clusters Model shows the distribution of globular clusters around the plane of the Milky Way as determined by Harlow Shapley in 1918. The Space View frame shows a 3D view of the distribution of the clusters around the galactic plane, along with the location of the Sun and Shapley's location for the galactic center (as well as the boundary of what Shapley called the "Big Galaxy") as determined by the cluster distribution. Globular clusters are shown in different colors depending on how their distances were determined: using Cepheid variables (red), brightest stars in the cluster (green), or apparent diameter of the cluster (blue). Other windows show a plot of the cluster locations projected onto the galactic plane, a plot of the number of clusters versus galactic longitude (showing a peak toward Shapley's proposed galactic center), and a histogram of distances from the galactic plane (showing a dearth of clusters very close to the plane).<br /><br />The simulation allows the viewer to adjust Shapley's distances to account for the effects of absorption. Absorption by dust in the galactic plane caused the cluster stars to appear dimmer than they should be from distance alone. This led Shapley to overestimate their distances, with larger errors for clusters near the galactic plane where absorption effects are greatest. The simulation uses a model for absorption proposed by Joel Stebbins in 1933. Stebbins assumed a thin (1 kpc thick), uniform absorbing layer along the galactic plane, with light passing perpendicularly through the plane being dimmed by 0.36 magnitudes. A slider in the simulation allows the user to adjust the dimming produced by the absorbing layer from 0 (Shapley's assumed value) up to 0.36 (the value found by Stebbins). The simulation will also display Stebbins' revised galactic center and boundary, which essentially matches the modern view of the Milky Way.

Requirements: No special requirements
Platforms: Mac, Mac OSX
Keyword: Absorption Caused Close Dearth Dimmer Distance Errors Greatest Larger Model Overestimate Planethe Simulation Viewer
Users rating: 0/10

License: Freeware Size: 1.54 MB
USER REVIEWS
More Reviews or Write Review


SHAPLEY'S GLOBULAR CLUSTERS RELATED
Productivity  -  PAcalculate 1.0.3.2031
Calculators for sound reinforcement and lighting: - SPL, SPL addition - Air absorption - Ceiling speaker coverage - Tempo Distance - Frequency wavelength, - dBu dBV V - Q B/W - Speaker cable. Low impedance, high...
1024 KB  
Travel  -  Transit Stop Alarm 1.0.0.1
Transit Stop Alarm is the ideal App for those long commutes home after a hard day's work. Just set your destination, turn the alarm on and relax. You can have your phone wake you when you are close to home (distance) or almost there...
1024 KB  
Productivity  -  Manual Scan 1.0.3.0
Problem to recognize Barcode or QR code with auto scanning? Manual Scan is the ultimate solution for it. With tools like ultra-zooming, area selection, photo capture, pausing camera viewfinder, and loading from albums; the successful rate of...
2 MB  
MS Office Add-Ins  -  DBX Reader Free 1.0
Try Recovery Toolbox for Outlook Express if you encounter dbx reader problems and Outlook Express is not openable for any reason. Very often, our users encounter minor issues therefore email recovery services may provide very good chances of...
1.1 MB  
Utilities  -  7zX for Mac OS 1.7.1
File archiver with high compression ratio. Compression ratio results are very dependent upon the data used for the tests. Usually 7zX compresses to 7z format 30-70% better than to zip format, and 2-10% better than most of other zip compatible...
2.3 MB  
Utilities  -  Argente - Registry Cleaner 3.0.0.1
One of main problems when your pc starts to run slow, is the fact that the Windows Registry is experimenting some problems, and is sending you a "S.O.S" message, asking to be cleaned and fixed urgently. Nowadays, there many programs to clean and...
4.3 MB  
Utilities  -  7zX 1. 7. 2001
7zX is a file archiver with high compression ratio. Compression ratio results are very dependent upon the data used for the tests. Usually 7zX compresses to 7z format 30-70% better than to zip format, and 2-10% better than most of other zip...
2.3 MB  
Development Tools  -  Generalized Nonlinear Non-analytic Chi-Square Fitting 1.0
fitChiSquare is a generalized chi-square fitting routine for any model function when data measurement errors are known; it returns the model parameters and their uncertainties at the delta chi-square = 1 boundary (68% confidence interval). It also...
40.96 KB  
E-Mail Tools  -  DBX Viewer Free 1.0
DBX Viewer Free easily repairs corrupted mailboxes in Outlook Express format if these files are damaged because of incorrect user activities, viral infections or other problems. Some users regularly encounter Outlook Express corruption problems,...
890 KB  
Development Tools  -  GPS Navigation Toolbox GNT 1.0
In the past several years compact radio navigation receivers have proliferated in the civilian market place, generally under the name of GPS or Global Positioning System. Appearing as handheld units or built into cars, mobile phones, and...
1.04 MB  
NEW DOWNLOADS IN MACINTOSH SOFTWARE, EDUCATION
Macintosh Software  -  MacX Free DVD to MP4 Converter for Mac 4.2.3
MacX Free DVD to MP4 Converter for Mac is an innovative yet free DVD to MP4 ripper software for Mac users without any functional limitation or watermark. It is able to convert DVDs including copy protected DVD movies to MP4, FLV, MP3 music on Mac...
36.23 MB  
Macintosh Software  -  MacX DVD Ripper Mac Free Edition 4.2.3
MacX DVD Ripper Mac Free Edition is the best free DVD ripper for Mac that can fulfill any of your DVD backup and ripping demands for free. It allows you to rip homemade and protected DVDs to MOV, MP4, M4V, etc for playing on iPhone, iPod, iPad,...
35.88 MB  
Macintosh Software  -  MacX Free Rip DVD to QuickTime for Mac 4.1.9
MacX Free Rip DVD to QuickTime for Mac is totally free yet versatile DVD to QuickTime ripper software for Mac users to free rip both normal and copy-protected DVDs to QuickTime MOV, MP4 on Mac with excellent image quality. Besides the powerful...
36.3 MB  
Macintosh Software  -  MacX QuickTime Video Converter Free 4.1.9
MacX QuickTime Video Converter Free Edition is the best program designed for Mac users to free convert almost all HD videos and SD videos to QuickTime accepted formats on Mac with first rate quality.The input file formats covered by this powerful...
23.11 MB  
Macintosh Software  -  MacX Free Apple TV Video Converter 4.1.9
MacX Free Apple TV Video Converter is a 100% free video to Apple TV converter software which enables you to free convert most popular videos like AVCHD, MKV, M2TS, AVI, MPEG, WMV, FLV etc to Apple TV compatible format like MP4 format on Mac OS. In...
22.89 MB  
Education  -  Sliding Down an Incline Plane Model 1.0
This interactive simulation shows a stone block lying at rest on an inclined plane. Initially, the component of gravity along the plane surface is exceeded by the force of static friction. The slope of the ramp can be increased or decreased,...
51.2 KB  
Education  -  MrAIC 1.4.4
MrAIC.pl is a Perl script for calculating AIC, AICc, BIC, and Akaike weights (for a review, see Burnham and Anderson, 2002) for nucleotide substitution models. Likelihood scores under different models are estimated using PHYML (Guindon and...
10.24 KB  
Education  -  HapEvolution 1.0
Complex diseases involve multiple genes with low penetration which may be distributed over the genome. Most of the current haplotype association methods are typically restricted in length and consist of alleles from contiguous SNPs. These...
1.61 MB  
Education  -  Three Charges 1.0
In this simulation, you can investigate the idea of the force between charged objects. Initially, the simulation sets up three charged objects, one at each corner of an equilateral triangle. The charges have different magnitudes - your job is to...
1.36 MB  
Education  -  AWclust 3.0
AWclust is easy to use non-parametric population structure analysis software written for R with a GUI interface. Just point and click and you will be on your way to discovering the important cluster information in your SNP data sets.
20.48 KB