Search Results for author: Sascha P. Quanz

Found 9 papers, 4 papers with code

Inferring Atmospheric Properties of Exoplanets with Flow Matching and Neural Importance Sampling

no code implementations13 Dec 2023 Timothy D. Gebhard, Jonas Wildberger, Maximilian Dax, Daniel Angerhausen, Sascha P. Quanz, Bernhard Schölkopf

Atmospheric retrievals (AR) characterize exoplanets by estimating atmospheric parameters from observed light spectra, typically by framing the task as a Bayesian inference problem.

Bayesian Inference

Parameterizing pressure-temperature profiles of exoplanet atmospheres with neural networks

1 code implementation6 Sep 2023 Timothy D. Gebhard, Daniel Angerhausen, Björn S. Konrad, Eleonora Alei, Sascha P. Quanz, Bernhard Schölkopf

When training and evaluating our method on two publicly available datasets of self-consistent PT profiles, we find that our method achieves, on average, better fit quality than existing baseline methods, despite using fewer parameters.

Bayesian Inference

Half-sibling regression meets exoplanet imaging: PSF modeling and subtraction using a flexible, domain knowledge-driven, causal framework

1 code implementation7 Apr 2022 Timothy D. Gebhard, Markus J. Bonse, Sascha P. Quanz, Bernhard Schölkopf

Our HSR-based method provides an alternative, flexible and promising approach to the challenge of modeling and subtracting the stellar PSF and systematic noise in exoplanet imaging data.

Denoising Pupil Tracking +1

Physically constrained causal noise models for high-contrast imaging of exoplanets

no code implementations12 Oct 2020 Timothy D. Gebhard, Markus J. Bonse, Sascha P. Quanz, Bernhard Schölkopf

The detection of exoplanets in high-contrast imaging (HCI) data hinges on post-processing methods to remove spurious light from the host star.

Vocal Bursts Intensity Prediction

MIRACLES: atmospheric characterization of directly imaged planets and substellar companions at 4-5 micron. I. Photometric analysis of $β$ Pic b, HIP 65426 b, PZ Tel B and HD 206893 B

no code implementations31 Dec 2019 Tomas Stolker, Sascha P. Quanz, Kamen O. Todorov, Jonas Kühn, Paul Mollière, Michael R. Meyer, Thayne Currie, Sebastian Daemgen, Baptiste Lavie

The $L'$-NB4. 05 and $L'$-$M'$ colors of the studied sample are all red while the NB4. 05-$M'$ color is blue for $\beta$ Pic b, gray for PZ Tel B, and red for HIP 65426 b and HD 206893 B (although typically with low significance).

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

PynPoint: a modular pipeline architecture for processing and analysis of high-contrast imaging data

no code implementations8 Nov 2018 Tomas Stolker, Markus J. Bonse, Sascha P. Quanz, Adam Amara, Gabriele Cugno, Alexander J. Bohn, Anna Boehle

The architecture of PynPoint has been redesigned with the core functionalities decoupled from the pipeline modules.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics

The formation of Jupiter by hybrid pebble-planetesimal accretion

1 code implementation14 Sep 2018 Yann Alibert, Julia Venturini, Ravit Helled, Sareh Ataiee, Remo Burn, Luc Senecal, Willy Benz, Lucio Mayer, Christoph Mordasini, Sascha P. Quanz, Maria Schönbächler

The evidence that Jupiter slowed down its growth after reaching 20 Earth masses for at least 2 Myr is puzzling because a planet of this mass is expected to trigger fast runaway gas accretion.

Earth and Planetary Astrophysics

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