Search Results for author: Charlie Conroy

Found 6 papers, 5 papers with code

A Diffuse Metal-Poor Component of the Sagittarius Stream Revealed by the H3 Survey

no code implementations28 Jul 2020 Benjamin D. Johnson, Charlie Conroy, Rohan P. Naidu, Ana Bonaca, Dennis Zaritsky, Yuan-Sen Ting, Phillip A. Cargile, Jiwon Jesse Han, Joshua S. Speagle

We speculate that this kinematically diffuse, low metallicity, population is the stellar halo of the Sagittarius progenitor system.

Astrophysics of Galaxies

SPECULATOR: Emulating stellar population synthesis for fast and accurate galaxy spectra and photometry

1 code implementation26 Nov 2019 Justin Alsing, Hiranya Peiris, Joel Leja, ChangHoon Hahn, Rita Tojeiro, Daniel Mortlock, Boris Leistedt, Benjamin D. Johnson, Charlie Conroy

We present \textsc{speculator} -- a fast, accurate, and flexible framework for emulating stellar population synthesis (SPS) models for predicting galaxy spectra and photometry.

Instrumentation and Methods for Astrophysics Astrophysics of Galaxies

The Payne: self-consistent ab initio fitting of stellar spectra

2 code implementations4 Apr 2018 Yuan-Sen Ting, Charlie Conroy, Hans-Walter Rix, Phillip Cargile

We present The Payne, a general method for the precise and simultaneous determination of numerous stellar labels from observed spectra, based on fitting physical spectral models.

Solar and Stellar Astrophysics Astrophysics of Galaxies

The Extended IRTF Spectral Library: Expanded coverage in metallicity, temperature, and surface gravity

1 code implementation24 May 2017 Alexa Villaume, Charlie Conroy, Benjamin Johnson, John Rayner, Andrew W. Mann, Pieter van Dokkum

We present a $0. 7-2. 5\mu m$ spectral library of 284 stars observed with the medium-resolution infrared spectrograph, SpeX, at the 3. 0 meter NASA Infrared Telescope Facility (IRTF) on Maunakea, Hawaii.

Solar and Stellar Astrophysics Astrophysics of Galaxies

Are Halo and Galaxy Formation Histories Correlated?

1 code implementation25 Jul 2011 Jeremy Tinker, Andrew Wetzel, Charlie Conroy

Using the 4000-A break as a measure of star formation history, we examine the correlation between the quenched fraction of galaxies, f_q, and large-scale environment, rho.

Cosmology and Nongalactic Astrophysics

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