Dr Ann Hornschemeier (Cardiff)

Astrophysics Science Division
NASA/GSFC
Code 662, Laboratory for X-ray Astrophysics
Greenbelt, MD 20771

tel: 301-286-7632
fax: 301-286-1684
e-mail: ann.h.cardiff @ nasa.gov

Present Position

Astrophysicist, Fields & Particles
Deputy Project Scientist, Constellation-X

Brief Bio

Dr. Ann Hornschemeier joined Goddard's Laboratory for X-ray Astrophysics in October 2004 as a civil servant after her Chandra fellowship at Johns Hopkins University in Baltimore, MD. Her work is in multiwavelength astronomy, with a major emphasis on X-ray emission from galaxies and on X-ray astronomy projects. She is currently working directly with graduate student Derek Hammer (JHU), NASA Postdoctoral Fellow Dr. Leigh Jenkins and routinely works with students at NASA on various projects concerning the X-ray emission from normal and star-forming galaxies. Dr. Hornschemeier has a research opportunity available for new NASA postdoctoral fellows entitled "High Energy Galaxy Surveys". Dr. Hornschemeier's full name is "Ann Hornschemeier Cardiff" but she publishes under her maiden name, Hornschemeier.

Educational Background

Ph.D., Astronomy & Astrophysics
Title: “CHANDRA X-RAY CONSTRAINTS ON NORMAL AND STARBURST
GALAXIES AT COSMOLOGICALLY INTERESTING DISTANCES”
Degree granted: May 11, 2002
Advisor and Institution: Prof. William N. Brandt,
The Pennsylvania State University

Master of Science, Astronomy & Astrophysics
Title: “NASA SOUNDING ROCKET FLIGHT 36.176UH:
NON-DISPERSIVE X-RAY SPECTROSCOPY OF SCORPIUS X-1”
Degree granted: August 1999
Advisor and Institution: Dr. David N. Burrows, The Pennsylvania State University

Bachelor of Science, Physics & Mathematics
Degree granted: May 1997, Magna Cum Laude
Institution: Drake University (Des Moines, Iowa)

Research Interests

Dr. Ann E. Hornschemeier is specializes in studies of X-ray emission from star formation in galaxies at cosmologically interesting distances (z > 0.1). This work is carried out using surveys by both space-based X-ray, UV, and infrared observatories as well as ground-based telescopes. This population consists of normal and starburst galaxies, whose X-ray emission arises from accreting binary star systems, supernovae, and hot interstellar gas. These processes, which are relatively well-observed in the nearby Universe, have not been extensively studied over the billion year evolutionary timescales that are now possible. Dr. Hornschemeier has recently expanded her research into the cluster and group environment. She has been active in astronomical outreach via small NASA grants for Girl Scout activities, having founded a new program for Baltimore-area girls that is in its third successful year (2006).

Current Projects

Dr. Hornschemeier is also a Deputy Project Scientist for the Constellation-X mission, due for launch in 2018. The position, focused on science advocacy, has involved a presentations to the public (including universities), interacting with members of the press, working with the Constellation-X Facility Science Team (the 40 member body that advises the mission), overseeing the Constellation-X science web pages, working with administrative and science staff under the Project Science office, and producing education and public outreach products for the mission (including booklets, single-page handouts, postcards, etc.). Dr. Hornschemeier also works with the engineers and instrument scientists to ensure the science requirements of the mission are met.

Selected Publications

• ‘Chandra X-ray Observations of Galaxies in an Off-Center Region of the Coma Cluster’
Hornschemeier, A. E. , Mobasher, B., Alexander, D. M., Bauer, F. E., Bautz, M. W.,
Hammer, D., Poggianti, B. M, ApJ,in press (astro-ph/0512547)

• ‘Chandra-SDSS Normal and Star-Forming Galaxies. I. X-Ray Source Properties of Galaxies
Detected by the Chandra X-Ray Observatory in SDSS DR2’, Hornschemeier, A. E. ,
Heckman, T. M., Ptak, A. F., Tremonti, C. A., Colbert, E. J. M., AJ, 129, 86

• ‘The Chandra Deep Field-North Survey: XVII. Evolution of magnetic activity in old late-
type stars’, Feigelson, E. D., Hornschemeier, A. E., Micela, G., Bauer, F. E., Alexander,
D. M., Brandt, W. N., Favata, F., Sciortino, S., Garmire, G. P., ApJ, 2004, 611,1107

• ‘Lower Mass Black Holes in the GOODS? Off-nuclear X-ray Sources’, Hornschemeier, A.E.,
Alexander, D.M., Bauer, F.E., Brandt, W.N., Chary, R., Conselice, C., Grogin, N., Koeke-
moer, A.M., Mobasher, B., Paolillo, M., Ravindranath, E.J. Schreier, ApJL, 2004, 600, 147

• ‘The Chandra Deep Field North Survey. XV. Optically Bright, X-Ray-Faint Sources’, Horn-
schemeier A.E., Bauer F.E., Alexander D.M., BrandtW.N., SargentW. L.W., Bautz M.W.,
Conselice C., Garmire G.P., Schneider D.P. & Wilson G., The Astronomical Journal , 126,
575

• ‘The weak outnumbering the mighty: normal galaxies in deep Chandra surveys.’, Horn-
schemeier, A.E., Bauer, F.E., Alexander, D.M., Brandt, W.N., Sargent, W.L.W., Vignali,
C., Garmire, G.P., & Schneider, D.P., 2003, Astronomische Nachrichten , 324, 12

• ‘The Chandra Deep Field North Survey VIII. X-ray constraints on galaxies from 0.4 < z < 1.5’,
Hornschemeier A.E., Brandt W.N., Alexander D.M., Bauer F.E., Garmire G.P., Schneider
D.P., Bautz M.W., Chartas G., 2001, The Astrophysical Journal , 568, 82

• ‘The Chandra Deep Field North survey. VII. X-ray emission from Lyman break galaxies’,
Brandt W.N., Hornschemeier A.E., Schneider D.P., Alexander D.M., Bauer F.E., Garmire
G.P., Vignali C., 2001, The Astrophysical Journal , 558, L5–L9

• ‘The Chandra deep survey of the Hubble Deep Field North area. IV. An ultradeep image of the
Hubble Deep Field North’, Brandt W.N., Hornschemeier A.E., Alexander D.M., Garmire
G.P., Schneider D.P., Broos P.S., Townsley L.K., Bautz M.W., Feigelson E.D., Griffiths R.E.,
2001, The Astronomical Journal , 122, 1–20

Publications at the ADS website.