VOSA: A short introduction. SEDs in the Virtual Observatory · VOSA: A short introduction. SEDs in...
Transcript of VOSA: A short introduction. SEDs in the Virtual Observatory · VOSA: A short introduction. SEDs in...
VOSA: A short introduction.VOSA: A short introduction.
SEDs in the Virtual ObservatorySEDs in the Virtual Observatory
Enrique Solano, Carlos Rodrigo
Astronomy ESFRI & Research Infrastructure Cluster ASTERICS - 653477
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 1/11
Why SEDs (Spectral Energy Distributions)?
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 2/11
Why SEDs (Spectral Energy Distributions)?
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 3/11
Why SEDs (Spectral Energy Distributions)?
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 4/11
Building SEDs
How to build a Spectral Energy Distribution?
Ingredients
● Multiwavelength photometry (observational and theoretical)
Data discovery,gathering and manipulation.
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 5/11
Building SEDs: Difficulties
● Data Manipulation: From magnitudes to fluxes
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 6/11
Building SEDs: Difficulties
● Data Manipulation: From theoretical spectra to synthetic photometry
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 7/11
● Available since 2008.
● More than 1000 users.
● More than 1.600.000 objects.
● 84 refereed papers.
VOSA to the rescue
http://svo2.cab.inta-csic.es/theory/vosa/
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 8/11
Science case
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 9/11
Science case
● Masses and radii of planets are necessary to:
● Shed light on inflated hot-Jupiters. ● 0.2-2.1MJup. Radii larger than predicted by models.● Internal heating.
→ Planet radius as a function of irradiation, age, magnetic fields, winds,…
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 10/11
Science case
● Empirical determination (model independent) of the radii and masses of stars hosting planets.
● Fbol → empirical ● Lbol=4πD²Fbol (D from TGAS parallaxes)● R=sqrt(Lbol/(4πσTef⁴))● g= G M / R²
VOSA Intro. E. SolanoIII ASTERICS VO School. Nov 2017 11/11