HR-pyPopStar: New tool to create single stellar population spectra and how to use them to analyse galaxies
DIPC Seminars
- Speaker
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Iker Millan, CIEMAT
- When
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2022/09/30
17:00 - Place
- Hybrid Seminar: Donostia International Physics Center
- Add to calendar
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iCal
We present the HR-PYPOPSTAR modesl, which provides a complete set (in ages) of
high-resolution (HR) spectral energy distributions of Single Stellar
Populations. The model uses the most recent high-wavelength-resolution
theoretical atmosphere libraries for main-sequence, post-AGB/planetary nebulae
and Wolf-Rayet stars. The spectral energy distributions are given for more
than a hundred
ages ranging from 0.1 Myr to 13.8 Gyr, at four different values of the
metallicity (Z = 0.004, 0.008, 0.019, and 0.05), considering four different
IMFs. The wavelength range goes from 91 to 24000 Å in linear steps δλ = 0.1
Å, giving a theoretical resolving power Rth,5000∼50000at 5000 Å. This is
the main novelty of these spectra, unique for their age and wavelength ranges.
The models include the ionizing stellar populations that are relevant at both
young (massive hot stars) and old (planetary nebulae) ages. We have tested the
results with some examples of HR spectra recently observed with MEGARA at GTC.
We highlight the importance of wavelength resolution in reproducing and
interpreting the observational data from the last and forthcoming generations
of astronomical instruments operating at 8-10 m class telescopes, with higher
spectral resolution than their predecessors.
Host: Marcos Pellejero
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