Amalia K. Hicks, Ph.D.
Effects of Selection Bias on Cosmological Cluster Surveys
X-ray temperature vs. luminosity. Squares designate moderate-redshift X-ray selected clusters and diamonds represent high-z optically-selected clusters. Pink and black lines show best-fitting relationships for these two samples (Hicks et al. 2008). Green triangles mark our new sample of moderate-z optically-selected clusters, indicating consistency with our high-z sample. This confirms that selection bias, not redshift evolution, is responsible for the normalization discrepancy between the two relationships. (Hicks et al. 2011, in draft).|
- Email: email@example.com
Phone: (517) 884-5606
Fax: (517) 432-8802
Office: 3255 Biomedical and Physical Sciences Bldg.
Department of Physics and Astronomy
3255 Biomedical and Physical Sciences Bldg.
Michigan State University
East Lansing, MI 48824-2320
- Clusters of Galaxies
- Observational Cosmology / Large Scale Structure Formation
- Cooling and Feedback in Galaxy Clusters
- The High-Redshift Universe and Cluster Evolution
- Star Formation in Brightest Cluster Galaxies
- Optical vs. X-Ray/SZ Cluster Selection
- AGN in Clusters
A Very Massive High-redshift Cluster
Adaptively smoothed Chandra ACIS-S image of SpARCS J161325+564930 (z∼0.9) in the 0.3-7.0 keV band. A ∼1 Mpc circle (∼R500) is centered on the cluster emission, and a red cross marks the coordinate of the brightest cluster galaxy. This is one of the most massive clusters (Mvirial ∼ 1e15 Msun) ever discovered at this distance. (Ellingson, Hicks et al. 2011, in prep).|
- B.A., English Literature,
- B.S., Physics,
University of Wisconsin - Milwaukee,
- M.S., Physics,
Massachusetts Institute of Technology (MIT), 2001.
- Ph.D., Astrophysical and Planetary Sciences
University of Colorado - Boulder, 2005.
- Postdoctoral Research Associate for Craig Sarazin,
University of Virginia, 2005-2008.
- Postdoctoral Research Associate for Megan Donahue and Mark Voit, Michigan State University
- Complete CV as a PDF file.
- Last Modified: Monday, 26-Sep-2011 16:20:46 EDT
- File Size:176K
- Complete Publication List as a PDF file.
- Last Modified:Monday, 26-Sep-2011 16:20:35 EDT
- File Size: 97K
Recent Star Formation in Brightest Cluster Galaxies (BCGs)
NUV inferred star formation rate vs. central cooling time (at R=20 kpc). A line shows the best BCES regress bisector fit, with a slope of -3.9+/-0.7. This correlation proves conclusively that star formation seen in cool core cluster BCGs is directly related to cooling gas in the cluster cores. (Hicks, Mushotzky & Donahue 2010).|
"Missing" Baryons in High-redshift Optically-selected Clusters
Histogram of core gas mass fractions (Mgas/Mtot) for eight high-redshift optically-selected (pink) and nine moderate-redshift X-ray selected clusters (blue) with 3.5 < Tx < 8 keV. A K-S test indicates that the gas mass fractions of the samples are different at >99% confidence (Hicks et al. 2008).|
- “Detecting Star Formation in Brightest Cluster Galaxies with GALEX”, Hicks, A. K., Mushotzky M., & Donahue, M. 2010, Astrophysical Journal, 719, 1844
- “Chandra X-ray Observations of the 0.6 < z < 1.1 Red-Sequence Cluster Survey Sample”, Hicks, A. K., Ellingson, E., Bautz, M., Cain, B., Garmire, G., Gilbank, D., Gladders, M., Hoekstra, H., & Yee, H. K. C. 2008, Astrophysical Journal, 680, 1022
- “A Multiwavelength Analysis of the Strong Lensing Cluster RCS022434-0002.5 at z=0.778”,
Hicks, A. K., Ellingson, E., Hoekstra, H., Gladders, M., Yee, H. K. C., Bautz, M., Gilbank, D., & Webb, T. 2007, Astrophysical Journal, 671, 1446
- “Multiwavelength Mass Comparisons of the z~0.3 CNOC Cluster Sample”,
Hicks, A. K., Ellingson, E., Hoekstra, H. & Yee, H. K. C. 2006,
Astrophysical Journal, 652, 232
- “Star Formation Rates in Cooling Flow Clusters: A UV Pilot Study with Archival XMM Newton Optical Monitor Data”,
Hicks, A. K., & Mushotzky, R. 2005,
Astrophysical Journal Letters, 635, L9
Selected Teaching/Educational Experience:
Me and CU undergrad Stevi Fawcett at Apache Point Observatory
- Summer 2010-present:
- Participating in the 2nd year graduate research project of Aaron Hoffer
- Fall 2009-Spring 2010:
- Participated in the undergraduate senior honors thesis of Ramon Steven Barthelemy
- Spring 2008:
- Attended a NASA Center for Astronomy Education (CAE)
- Summer 2007:
- Instructor of undergraduate course
Astronomy 348: Introduction to Cosmology
- Spring 2007:
- Guest speaker at a public open house at Leander McCormick Observatory at the University of Virginia
June 28, 2012 at 15:17:36 EDT by hicksam