Hertzsprung–Russell (H-R) Diagrams

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written by Mario Belloni

The Hertzsprung–Russell (H-R) Diagrams model simulates Hertzsprung–Russell (HR or H-R) diagram for groups of stars. The diagram is a scatter plot of steller luminosity vs. stellar temperature. The luminosity of stars is proportional to the star's radius squared and its temperature to the fourth power, and for Main Sequence stars, their luminosity is also proportional to their mass to the 3.5 power. Since the range of stellar luminosities and stellar temperatures is so large, the plot uses a log-log scale. The diagram is a way to understand stellar evolution.

The HR diagram shows nearby stars, bright stars, and a user-defined star. One can also show the blackbody radiation curve and the user-defined star. The radius of the user-defined star (in Rsun) and the temperature of the user-defined star in Kelvin (5780 K is Tsun) can be changed.

Please note that this resource requires at least version 1.5 of Java (JRE).

Please note that this resource requires Java3D.

.jar

download 1515kb .jar
Last Modified: June 6, 2014
previous versions

1 source code document is available

Subjects	Levels	Resource Types
Astronomy - Astronomy Education = Curricula - Stars = Hertzsprung-Russell Diagram = Spectral Types Optics - Photometry = Blackbodies	- Lower Undergraduate - High School - Informal Education	- Instructional Material = Curriculum support = Demonstration = Simulation

Intended Users	Formats	Ratings
- Educators - Learners	- application/java	Currently 5.0/5 Rated 5.0 stars by 2 people Want to rate this material? Login here!

Access Rights:: Free access
License:: This material is released under a GNU General Public License Version 3 license.
Rights Holder:: Mario Belloni
Keywords:: EJS, Easy Java Simulations, H-R Diagram, OSP, Open Source Physics, blackbody, spectrum, star
Record Cloner:: Metadata instance created November 11, 2010 by Mario Belloni
Record Updated:: December 2, 2021 by Lyle Barbato
Last Update when Cataloged:: November 11, 2010
Other Collections:: The Open Source Physics

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Record Link

<a href="https://www.compadre.org/astronomy/items/detail.cfm?ID=10503">Belloni, Mario. "Hertzsprung–Russell (H-R) Diagrams." Version 1.0.</a>

AIP Format

M. Belloni, Computer Program HERTZSPRUNG–RUSSELL (H-R) DIAGRAMS, Version 1.0 (2010), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10503&DocID=1959).

AJP/PRST-PER

M. Belloni, Computer Program HERTZSPRUNG–RUSSELL (H-R) DIAGRAMS, Version 1.0 (2010), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10503&DocID=1959>.

APA Format

Belloni, M. (2010). Hertzsprung–Russell (H-R) Diagrams (Version 1.0) [Computer software]. Retrieved October 3, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10503&DocID=1959

Chicago Format

Belloni, Mario. "Hertzsprung–Russell (H-R) Diagrams." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10503&DocID=1959 (accessed 3 October 2024).

MLA Format

Belloni, Mario. Hertzsprung–Russell (H-R) Diagrams. Vers. 1.0. Computer software. 2010. Java (JRE) 1.5, Java3D. 3 Oct. 2024 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10503&DocID=1959>.

BibTeX Export Format

@misc{ Author = "Mario Belloni", Title = {Hertzsprung–Russell (H-R) Diagrams}, Month = {November}, Year = {2010} }

Refer Export Format

%A Mario Belloni %T Hertzsprung–Russell (H-R) Diagrams %D November 11, 2010 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10503&DocID=1959 %O 1.0 %O application/java

EndNote Export Format

%0 Computer Program %A Belloni, Mario %D November 11, 2010 %T Hertzsprung–Russell (H-R) Diagrams %7 1.0 %8 November 11, 2010 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10503&DocID=1959

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The AIP Style presented is based on information from the AIP Style Manual.

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