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Exoplanet Detection JS: Radial Velocity Method
written by Mario Belloni
The Exoplanet Detection JS: The Radial Velocity Method model simulates the detection of exoplanets by using the radial velocity method and the Doppler effect. In this simulation the exoplanet orbits the star (sun-sized) in circular motion via Kepler's third law.  The radial velocity of the star is determined from the velocity of the exoplanet.  This velocity is then used to calculate the Doppler shift of the Fraunhofer lines of the star.  In practice it is the Doppler shift of the Fraunhofer lines of the star that are detected and from this the radial velocity is inferred.  From this the mass and orbital period and average exoplanet-star separation are determined.  In the simulation the star-exoplanet system is shown as seen from Earth (edge on view) and from space (overhead view), and with the star and exoplanet sizes not shown to the scale of the orbit.  In addition, the Fraunhofer lines are shown.  The radial velocities of stars are such that the Doppler shifts are small, to compensate you may snap to the Na line and use the right-hand side slider to zoom in on that line to see wavelength shift.  The mass of the exoplanet (relative to the mass of Jupiter), the average star-exoplanet separation (in AU), and the inclination of the system relative to Earth can be changed.

The simulation is in JavaScript and will run on any device and operating system with a JavaScript enabled browser.

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

Please note that this resource requires Java3D.
1 supplemental document is available
1 source code document is available
Subjects Levels Resource Types
Astronomy
- Astronomy Education
= Curricula
- Cosmic Time and Distance
= Redshift
- Exoplanets
= Detection Methods
- Informal Education
- High School
- Lower Undergraduate
- Instructional Material
= Demonstration
Intended Users Formats Ratings
- Learners
- Educators
- application/javascript
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Access Rights:
Free access
License:
This material is released under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 license.
Rights Holder:
Mario Belloni
Keywords:
51 Pegasi b, Doppler effect, EJS, Easy Java Simulations, OSP, Open Source Physics, detection, exoplanet, radial velocity
Record Cloner:
Metadata instance created October 12, 2019 by Mario Belloni
Record Updated:
October 12, 2019 by Mario Belloni
Last Update
when Cataloged:
October 12, 2019
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
M. Belloni, Computer Program EXOPLANET DETECTION JS: RADIAL VELOCITY METHOD, Version 1.0 (2019), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=15176&DocID=5105).
AJP/PRST-PER
M. Belloni, Computer Program EXOPLANET DETECTION JS: RADIAL VELOCITY METHOD, Version 1.0 (2019), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=15176&DocID=5105>.
APA Format
Belloni, M. (2019). Exoplanet Detection JS: Radial Velocity Method (Version 1.0) [Computer software]. Retrieved November 13, 2019, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=15176&DocID=5105
Chicago Format
Belloni, Mario. "Exoplanet Detection JS: Radial Velocity Method." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=15176&DocID=5105 (accessed 13 November 2019).
MLA Format
Belloni, Mario. Exoplanet Detection JS: Radial Velocity Method. Vers. 1.0. Computer software. 2019. Java (JRE) 1.5, Java3D. 13 Nov. 2019 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=15176&DocID=5105>.
BibTeX Export Format
@misc{ Author = "Mario Belloni", Title = {Exoplanet Detection JS: Radial Velocity Method}, Month = {October}, Year = {2019} }
Refer Export Format

%A Mario Belloni
%T Exoplanet Detection JS: Radial Velocity Method
%D October 12, 2019
%U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=15176&DocID=5105
%O 1.0
%O application/javascript

EndNote Export Format

%0 Computer Program
%A Belloni, Mario
%D October 12, 2019
%T Exoplanet Detection JS: Radial Velocity Method
%7 1.0
%8 October 12, 2019
%U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=15176&DocID=5105


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Exoplanet Detection JS: Radial Velocity Method:

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The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the Exoplanet Detection JS: Radial Velocity Method.

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