Keith Bechtol

KICP Fellow

Ph.D., Physics, Stanford University, 2012
 
Contact Information
Phone: (773) 702-7851
Location: LASR 224
Email: bechtolkicp.uchicago.edu
WWW: Web Site
 
Research
Multiwavelength view of the nearest starburst galaxy, M82, including gamma-ray detections with VERITAS and the Fermi LAT.
My research over the past five years has focused on understanding the origin of the isotropic diffuse gamma-ray background (IGRB). Extragalactic gamma-ray sources too faint to be individually resolved are a guaranteed component of the IGRB, and unresolved Galactic sources as well as truly diffuse processes must also contribute at some level. I initially approached this problem by searching for new extragalactic gamma-ray source populations such starburst galaxies, galaxy clusters, and radio-quiet AGN in order to constrain their IGRB contributions. Along the way, I also became interested in the physics of cosmic rays in the interstellar and intergalactic medium. Our findings suggested that the gamma-ray output of non-AGN galaxies is related to their star-formation activity -- which connected my interest in the IGRB to the cosmological evolution of galaxies. I am currently affiliated with both the Fermi-LAT and NuSTAR collaborations and continue to work on characterizing the IGRB as well as constituent extragalactic source populations.

I am excited to join the KICP to begin work on the Dark Energy Survey (DES), which will feature observations of over 100 million galaxies as part of an ensemble of studies concerning the accelerating expansion of the Universe.

Ongoing Scientific Projects:
 
Talks, Lectures, & Workshops

 
KICP Publications
2014 | 2013 | 2012


Latest Journal Publications
  1. "Mass and galaxy distributions of four massive galaxy clusters from Dark Energy Survey Science Verification data", arXiv:1405.4285 (May 2014)
  2. "Mapping Dust in 3D with DECam: A Pilot Galactic Plane Survey", NOAO Proposal ID #2014A-0429 (Feb 2014)
  3. "Discovery of GeV Emission from the Circinus Galaxy with the Fermi Large Area Telescope", The Astrophysical Journal, Volume 779, Issue 2, article id. 131, 7 pp. (2013) (Dec 2013)
  4. "Prospects for Detecting Gamma Rays from Annihilating Dark Matter in Dwarf Galaxies in the Era of DES and LSST", arXiv:1309.4780 (Sep 2013)
  5. "Constraints on the Galactic Population of TeV Pulsar Wind Nebulae Using Fermi Large Area Telescope Observations", The Astrophysical Journal, Volume 773, Issue 1, article id. 77, 27 pp. (2013) (Aug 2013)
  6. "NuSTAR and Chandra Insight into the Nature of the 3-40 keV Nuclear Emission in NGC 253", The Astrophysical Journal, Volume 771, Issue 2, article id. 134, 8 pp. (2013) (Jul 2013)
  7. "The Fermi All-sky Variability Analysis: A List of Flaring Gamma-Ray Sources and the Search for Transients in Our Galaxy", The Astrophysical Journal, Volume 771, Issue 1, article id. 57, 12 pp. (2013) (Jul 2013)
  8. "CTA contributions to the 33rd International Cosmic Ray Conference (ICRC2013)", arXiv:1307.2232 (Jul 2013)
  9. "Determination of the Point-spread Function for the Fermi Large Area Telescope from On-orbit Data and Limits on Pair Halos of Active Galactic Nuclei", The Astrophysical Journal, Volume 765, Issue 1, article id. 54, 19 pp. (2013) (Mar 2013)
  10. "Introducing the CTA concept", Astroparticle Physics, Volume 43, p. 3-18 (Mar 2013)
  11. "Detection of the Characteristic Pion-Decay Signature in Supernova Remnants", Science, Volume 339, Issue 6121, pp. 807-811 (2013) (Feb 2013)
  12. "First SN Discoveries from the Dark Energy Survey", The Astronomer's Telegram, #4668 (Dec 2012)
  13. "Binary Millisecond Pulsar Discovery via Gamma-Ray Pulsations", Science, Volume 338, Issue 6112, pp. 1314- (2012) (Dec 2012)

Latest Conference Proceedings
  1. "Detection of ultra-high energy neutrino interactions in ice: comparing radio detector array designs", American Astronomical Society, HEAD meeting #14, #116.12 (Aug 2014)
  2. "A NuSTAR Perspective on the Star-forming Galaxy M83", American Astronomical Society, HEAD meeting #14, #403.06 (Aug 2014)
  3. "The resolved and unresolved components of the Isotropic Gamma-ray Background", American Astronomical Society, HEAD meeting #14, #400.06 (Aug 2014)
  4. "In Search of AGN in Starburst Galaxies with NuSTAR", American Astronomical Society, HEAD meeting #14, #110.11 (Aug 2014)
  5. "NuSTAR observations of the starburst galaxy NGC 253: constraints on diffuse inverse Compton emission", American Astronomical Society, HEAD meeting #14, #110.10 (Aug 2014)
  6. "Intensity of the Isotropic Diffuse Gamma-ray Background from 100 MeV to 820 GeV", American Astronomical Society, HEAD meeting #14, #108.04 (Aug 2014)
  7. "Discovery of GeV Gamma-ray Emission from the Circinus Galaxy with the Fermi-LAT", American Astronomical Society, AAS Meeting #223, #328.04 (Jan 2014)
  8. "The intensity of isotropic diffuse emission measured with the Fermi Large Area Telescope", American Astronomical Society, AAS Meeting #223, #426.08 (Jan 2014)
  9. "In Search of AGN in Starburst Galaxies with NuSTAR", American Astronomical Society, AAS Meeting #223, #438.16 (Jan 2014)
  10. "A NuSTAR Perspective on the X-ray Binary Populations of Starburst Galaxies", American Astronomical Society, AAS Meeting #223, #438.07 (Jan 2014)

 
Visitors
Past Visitors:
  1. Joshua Dillon, MIT (2014)
  2. Amy Furniss, Stanford University (2014)
  3. Hironao Miyatake, Princeton University (2014)
  4. Andres Romero-Wolf, Jet Propulsion Laboratory (2014)
  5. Meng Su, MIT (2014)
  6. Ryan Cooke, University of California Santa Cruz (2013)