About Me

UT Logo

University of Toledo

I am a Ph.D. candidate in the Department of Physics and Astronomy, conducting research with Dr. Michael Cushing.

Kevin K. Hardegree-Ullman

Kevin K. Hardegree-Ullman

My research interests are low-mass stars, brown dwarfs, exoplanets, substellar atmospheres, star formation, and astronomy education.

UA Logo

University of Arizona

I completed my B.S. in Astronomy with Physics and Math minors in 2011. I conducted research with Dr. Yancy Shirley.

Research

 

Synopsis of my research by Active Galactic Videos

 


Spectroscopic Characterization of M Dwarfs

  • I am conducting spectroscopic survey of the 550 probable mid-type M dwarfs in the original Kepler field with Mike Cushing and Phil Muirhead.
  • We plan to refine the planet occurrence rate calculations for this latest spectral type.
  • Spectra yield more precise stellar mass and radius measurements than photometry.
  • We are gathering red optical spectra (~6300-9600Å) using the DeVeny spectrograph at the Discovery Channel Telescope and the Hydra multi-object spectrograph at WIYN.
  • Our time on WIYN is part of the NASA-NSF Exoplanet Observational Research program.

Kepler Mid-Type M Dwarf Spectra






WISE J1405+5534 photometric variability

Y Dwarf Variability

Spitzer Observations of K2 Planets




HD 3167 b and c compared to Earth and Neptune

Curriculum Vitae

Contact Information

Department of Physics and Astronomy
The University of Toledo
2801 West Bancroft Street, MS 113
Toledo, OH 43606

 

Phone: (419) 530-4490
E-mail: ude.odelotu.stekcor@gedrahk
Website: http://kevinkhu.com

Education

August 2012 to Present
  • Ph.D., Physics with concentration in Astrophysics
  • Expected graduation 2018
August 2006 to May 2011
  • B.S., Astronomy
  • Physics and Mathematics Minors

Research Interests

Low-mass stars, brown dwarfs, exoplanets, substellar atmospheres, star formation, and astronomy education.

Research Awards

Infrared Processing and Analysis Center (IPAC) Visiting Graduate Fellowship
February to August 2017
NASA WIYN PI Data Award
Fall 2015, Spring 2016, Fall 2016, Spring 2017, Fall 2017
Graduate Research Award
April 2014

Refereed Journal Articles

Investigating the Physical Properties of Transiting Hot Jupiters with the 1.5-m Kuiper Telescope
        Turner, J. D.; Leiter, R. M.; Biddle, L. I.; Pearson, K. A.; Hardegree-Ullman, K. K.; et al., 2017. MNRAS, 472, 3871.

The Most Massive Heartbeat: An In-Depth Analysis of Iota Orionis
        Pablo, H.; Richardson; N. D.; et al.; (Hardegree-Ullman, K. K. 18th author) 2017. MNRAS, 467, 2494.

A Spectroscopic Orbit for the Late-type Be Star Beta CMi
        Dulaney, N. A.; Richardson, N. D.; et al.; (Hardegree-Ullman, K. K. 12th author) 2017. ApJ, 836, 112.

Photometric Monitoring of the Coldest Known Brown Dwarf with the Spitzer Space Telescope
        Esplin, T. L.; Luhman, K. L.; Cushing, M. C.; Hardegree-Ullman, K. K.; et al., 2016. ApJ, 832, 58.

Observed Variability at 1μm and 4μm in the Y0 Brown Dwarf WISEP J173835.52+273258.9
        Leggett, S. K.; Cushing, M. C.; Hardegree-Ullman, K. K.; et al., 2016. ApJ, 830, 141.

Ground-Based Near-UV Observations of 15 Transiting Exoplanets: Constraints on Their Atmospheres and No Evidence for Asymmetrical Transits
        Turner, J. D.; Pearson, K. A.; Biddle, L. I.; Smart, B. M.; Zellem, R. T.; Teske, J. K.; Hardegree-Ullman, K. K.; et al., 2016. MNRAS, 459, 789.

The First Detection of Photometric Variability in a Y Dwarf: WISE J140518.39+553421.3
        Cushing, M. C.; Hardegree-Ullman, K. K.; et al., 2016. ApJ, 823, 152.

Near-UV and Optical Observations of the Transiting Exoplanet TrES-3b
        Turner, J. D.; Smart, B. M.; Hardegree-Ullman, K. K.; et al., 2013. MNRAS, 428, 678.

Observing Time Awarded

WIYN
29 nights
NASA IRTF
12 nights

Astrophotography

This is a collection of astronomical images I've taken recently at Ritter Observatory, the Discovery Channel Telescope, and other areas of Arizona and Ohio. Please contact me if you want a full-resolution version or if you would like to use any of these images for any purpose.

M1 - Crab Nebula

M1 - Crab Nebula

Ritter Observatory

M13 - Hercules Cluster

M13 - Hercules Cluster

Ritter Observatory

M16 - Eagle Nebula

M16 - Eagle Nebula

Ritter Observatory

M27 - Dumbbell Nebula

M27 - Dumbbell Nebula

Ritter Observatory

M42 - Orion Nebula

M42 - Orion Nebula

Ritter Observatory

M57 - Ring Nebula

M57 - Ring Nebula

Ritter Observatory

M82 - Cigar Galaxy with SN2014J

M82 - Cigar Galaxy with SN2014J

Ritter Observatory

Horsehead Nebula

Horsehead Nebula

Discovery Channel Telescope

Pointing to the center of the Milky Way

Pointing to the center of the Milky Way

Near Assumption, Ohio

Camelopardalid Meteor Shower

Camelopardalid Meteor Shower

Near Assumption, Ohio

Observing at the DCT

Observing at the DCT

Discovery Channel Telescope

Annular Eclipse

Annular Eclipse

Horseshoe Bend, Arizona - May 20, 2012

Venus Transit - Mt. Lemmon SkyCenter, Arizona - June 5, 2012

Resources

Student Astronomers

  • Facebook group for astronomy students.
  • Place for students to ask peers about research.

Teach Astronomy

  • Astronomy learning resource.
  • Free intro astronomy textbook.

Active Galactic Videos

  • Educational videos about astronomy.
  • Created by Chris Impey's group.

Staralt

  • Alternative to iObserve for non-Mac users.
  • From Isaac Newton Group of Telescopes.