Caroline Caldwell

Astrophysics Research Institute
Liverpool John Moores University
ADS
CV

See my work

Research

My research interests include Cosmology with Galaxy Clusters, Radio Loud-AGN, and Extra Solar Planets. Please click on a topic to learn more, or click on this link to view my CV. Thanks for stopping by! Please note this site is in development, and some links may be blank.

Clusters

View Paper

I research the effects of cosmic neutrinos on large scale structure formation. I have shown in the above paper that neutrinos reduce the number of groups and clusters above a velocity dispersion threshold of 300 kilometers per second. Using a velocity dispersion threshold instead of a mass threshold reduces the chance that systematic mass biases are the reason for lower than expected cluster counts.

I am currently working on a paper comparing my simulated results with the GAMA survey to obtain a constraint on the summed neutrino mass.

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Active Galactic Nuclei

Blazar Polarization

Polarization of Blazar jets reveals the structure of the jet's magnetic field. We looked for differences in B field structure between FRI and BLLAC objects. This work was presented at the 2011 Winter AAS meeting in Seattle.

2011 Poster

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Exoplanets

McDonald Observatory Planet Search program and Spectroscopic Followup for Kepler.
My research involved detecting "Jupiter analogue" signals in 12 year old+ radial velocity light curves. This is still a work in progress. Preliminary results were presented at the 2012 Winter AAS meeting in Austin.

2012 Poster

I also had the opportunity to accrue almost a month of solo observing time on the Harlan J. Smith 2.7M telescope at McDonald observatory, where I took spectra of stars for Kepler followup and the McDonald Observatory Planet Search team. I really like observing, and was really grateful for this opportunity.

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Programs

Photometric Star Galaxy Quasar Separation Program

This program utilized EAZY template fitting program combined with a Bayesian algorithm to determine from multiband photometry whether an object selected by SourceExtractor is a star, galaxy, or quasar. It was developed on the ULTRAVISTA survey, and then successfully tested on the UDS field to ensure some degree of universality and robustness. The code is written in IDL and is available upon request.

A infographic of the program can be found through this link

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About

I'm from a small town in Northeast Texas called Mount Pleasant. After high school, I moved to Santa Fe, New Mexico for my undergraduate degree at St. John's College. After getting my bachelor's in liberal arts from St. John's I took a year off, and then moved to Austin, Texas to complete a second bachelor's in Astronomy at the University of Texas. Now I am a postgraduate student at Liverpool John Moores University.

When I'm not doing research, I like to play cello. I am a member of the Port Sunlight Orchestra, and previously played with the Austin Baroque Players. I also have a really cool, old ukulele that I inherited from my great grandmother. I like to play old-timey folk songs on it.

Contact Me

Address

Astrophysics Research Institute,
Liverpool John Moores University
IC2, Liverpool Science Park
146 Brownlow Hill
Liverpool L3 5RF
United Kingdom

(+44) 151 231 2950
c.e.caldwell@2012. at university's domain ljmu.ac.uk