J/A+A/669/A113 A standard grid of templates and masks (Kitzmann+, 2023)
The Mantis Network. A standard grid of templates and masks for cross-correlation
analyses of ultra-hot Jupiter transmission spectra.
Kitzmann D., Hoeijmakers H.J., Grimm S.L., Borsato N.W., Lueber A.,
Prinoth B.
<Astron. Astrophys. 669, A113 (2023)>
=2023A&A...669A.113K 2023A&A...669A.113K (SIMBAD/NED BibCode)
ADC_Keywords: Models, atmosphere ; Spectroscopy
Keywords: planets and satellites: atmospheres -
planets and satellites: composition - techniques: spectroscopic
Abstract:
The atmospheres of ultra-hot Jupiters are highly interesting and
unique chemical laboratories. Due to the very high atmospheric
temperatures, their chemical composition is dominated by atoms and
ions instead of molecules, while the formation of aerosols on their
day-sides is unlikely.
Thus, these planets offer the potential of detailed chemical
characterisation by directly detecting elements through
high-resolution day-side and transit spectroscopy. This allows, in
principle, to directly infer the element abundances of these objects,
which may provide crucial constraints on their formation process and
evolution history.
In the recent past, several chemical species, mostly in the form of
atoms and ions, have already been detected using high-resolution
spectroscopy in combination with the cross-correlation technique.
As part of the Mantis network, we provide a grid of standard templates
in this study, designed to be used together with the cross-correlation
method. This allows for the straightforward detection of chemical
species in the atmospheres of hot extrasolar planets.
In total, we calculate high-resolution templates for more than 140
different species across several atmospheric temperatures. In addition
to the high-resolution templates, we also provide line masks that just
include the position of line peaks and their absorption depths
relative to the spectral continuum. A separate version of these line
masks also takes potential blending effects with lines of other
species into account. All templates and line masks are publicly
available on the CDS data server.
Description:
Here, we provide the templates for cross-correlation calculations of
hot exoplanet spectra in form of FITS files.
The line masks that just contain the line positions and corresponding
weights are distributed in form of simple ASCII files.
A Python script to resample the templates to different spectral
resolutions can be found at:
https://github.com/daniel-kitzmann/XCorrTemplateResample
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
listmask.dat 61 988 List of files in masks subdirectory
listtemp.dat 66 755 List of files in templates subdirectory
templates/* . 755 *Cross-correlation templates as FITS files
masks/* . 988 *Cross-correlation line masks
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Note on templates/*: The files' naming convention is as follows:
xxymi_jjjj.fits with xx: chemical symbol of the element,
y: ionisation stage, i: metallicity [M/H] and
jjjj: atmospheric temperature in K.
Note on masks/*: Normal line masks are named xxymi_jjjj.dat, while the ones
based on subtracted templates are denoted by xxymijjjjsubtract.dat
xx: chemical symbol of the element, y: ionisation stage,
i: metallicity [M/H] and jjjj: atmospheric temperature in K.
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Byte-by-byte Description of file: listmask.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- El Chemical symbol of the element with ionisation
stage
19- 22 I4 K T Atmospheric temperature
24- 32 A9 --- n_T Note on atmospheric temperature
34- 61 A28 --- FileName Name of the file in subdirectory masks
--------------------------------------------------------------------------------
Byte-by-byte Description of file: listtemp.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- El Chemical symbol of the element with ionisation
stage or "continuum_transit"
19- 22 I4 K T Atmospheric temperature
34- 66 A33 --- FileName Name of the fits file in subdirectory templates
--------------------------------------------------------------------------------
Byte-by-byte Description of file (#): masks/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.6 nm mu Wavelength of line centre
14- 26 E13.7 --- d Weight of spectral line
--------------------------------------------------------------------------------
Acknowledgements:
Daniel Kitzmann, daniel.kitzmann(at)unibe.ch
(End) Daniel Kitzmann [University of Bern], Patricia Vannier [CDS] 22-Oct-2022