Ground-based Spectroscopy of the Exoplanet XO-2b using a Systematic Wavelength Calibration

pearsonkyle/Signal-Alignment 5 Nov 2018

We obtain consistent results from each telescope with a Na amplitude of 521$\pm$161 ppm and 403$\pm$186 ppm for GMOS and KOSMOS respectively.

Earth and Planetary Astrophysics

43
0.01 stars / hour

EXOFASTv2: A public, generalized, publication-quality exoplanet modeling code

jdeast/EXOFASTv2 22 Jul 2019

We highlight several potential pitfalls in exoplanet modeling, including the handling of eccentricity in transit-only fits, that the standard exoplanet convention for $\omega$ uses a left-handed coordinate system, contrary to most modern textbooks, how to avoid an important degeneracy when allowing negative companion masses, and a widely unappreciated, potential 10-minute ambiguity in the reported transit times.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics

23
0.01 stars / hour

Data analysis recipes: Fitting a model to data

wdconinc/data-analysis-recipes-fitting-a-model-to-data 27 Aug 2010

We go through the many considerations involved in fitting a model to data, using as an example the fit of a straight line to a set of points in a two-dimensional plane.

Instrumentation and Methods for Astrophysics Data Analysis, Statistics and Probability

3
0.01 stars / hour

Inflow, Outflow, Yields, and Stellar Population Mixing in Chemical Evolution Models

bretthandrews/flexce 21 Dec 2016

For the stellar population mixing scenario, the abundances of alpha-elements and elements with metallicity-dependent yields dominate the first and second principal components, respectively, and collectively explain 99% of the variance in the model.

Astrophysics of Galaxies Solar and Stellar Astrophysics

16
0.01 stars / hour

Searching for Exoplanets Using Artificial Intelligence

pearsonkyle/Exoplanet-Artificial-Intelligence 14 Jun 2017

Here we present a new method of detecting exoplanet candidates in large planetary search projects which, unlike current methods uses a neural network.

Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics

35
0.01 stars / hour

A search for multi-planet systems with TESS using a Bayesian N-body retrieval and machine learning

pearsonkyle/Nbody-AI 8 Jul 2019

The residuals of fitting a linear orbit ephemeris are used to search for transit timing variations.

Earth and Planetary Astrophysics

24
0.01 stars / hour

The causal effect of environment on halo mass and concentration

pynbody/genetIC 7 Jul 2021

Understanding the impact of environment on the formation and evolution of dark matter halos and galaxies is a crucial open problem.

Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics

14
0.01 stars / hour

PINT: A Modern Software Package for Pulsar Timing

nanograv/pint 30 Nov 2020

Over the past few decades, the measurement precision of some pulsar-timing experiments has advanced from ~10us to ~10ns, revealing many subtle phenomena.

Instrumentation and Methods for Astrophysics

91
0.01 stars / hour

KERN

kernsuite/packaging 25 Oct 2017

KERN is a bi-annually released set of radio astronomical software packages.

Instrumentation and Methods for Astrophysics

13
0.01 stars / hour

A new, large-scale map of interstellar reddening derived from HI emission

jvines/astroARIADNE 31 May 2017

In this low column density regime, we derive a characteristic value of $N_{\rm HI}/E(B-V) = 8. 8\times10^{21}\, \rm\, cm^{2}\, mag^{-1}$ for gas with $|v_{\rm LSR}| < 90\,\rm km\, s^{-1}$ and find no significant reddening associated with gas at higher velocities.

Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics

22
0.01 stars / hour