Study of Exoplantes

Study of Exoplantes (developed by C. Bot and T. Boch)

Uses the VizieR and Simbad services and TOPCAT.

This tutorial highlights the following functionalities: VizieR queries by UCDs, object selection in TOPCAT, SIMBAD query by scripts.

launch TOPCAT
go to the VizieR webpage

look for exoplanets catalogs containing informations on the period: "Word matching" query with the word "exoplanets"+ query by UCDs using the UCD TIME_PERIOD
perform a joined query of table 2 and 3 from the nearby exoplanets catalog (Butler+ 2006)
select objects for which the minimum mass is greater than 7 Jupiter masses
save the result as a VOTable file

load the VOTable in TOPCAT

display the data on the 3D sky grid; add a color scale to the data points that is proportional to the period
display the data in a 2D plot (e.g. by plotting the periods against the radii)
draw a region in the plot to define a subset of a few data points
redefine the columns in the subset table so that it contains only the stellar names associated to the subset data points
save this subset to a file in CSV format

go to the Simbad webpage
copy/paste the following script:

format object form1 "%IDLIST(1) : %COO(A D) %OTYPE \n%bibcodelist(2000-2010)[%*\n]\n"
set radius 0.2s
query around 55 Cnc

-- format object lets you define your own output format --- %IDLIST enables you to get all the existing identifiers for an object. In this example, one will only get the main identifier thanks to the "1" in the options () --- the scripts is then asking to display the coordinates (%COO(A D)) and the main object type (%OTYPE) as defined in Simbad --- this scrip will also give all the bibliographical references on each object, published between 2000 and 2010. This is performed using the option %bibcodelist(2000-2010). The formating options [%*\n] will give a display of only one bibcode per line -- the line starting with set radius defines a research radius in a global manner (i.e. it will apply to all queries) --Finally, once the format and the query radius are defined, you can specify all the identifiers that you wish to query. A line like "query around 55 Cnc" has to be written for each object to query. To query by coordinates, one could instead write query coo 12 30 +40 50]

Hint: you can get help on the script syntax and the existing options at http://simbad.u-strasbg.fr/simbad/sim-help?Page=sim-fscript

complement this script by querying 2 or 3 objects of your choice, taken in the CSV file
if you wish to mask the script display in the output, as well as the execution details, add the following two lines at the beginning of the script:

output script=off output console=off

execute the script with the "submit" button
once the result has been displayed, copy the list of bibcodes obtained for a "Planet?" type object and query the ADS service by pasting it in the Bibliographic Code Query form at http://cdsads.u-strasbg.fr/bib_abs.html and submit