Deep Optical Photometry of Six Fields in the Andromeda Galaxy (2009)
Brown, Thomas M., Smith, Ed, Ferguson, Henry C., Guhathakurta, Puragra, Kalirai, Jason S., Kimble, Randy A., ...
Using the Advanced Camera for Surveys on the Hubble Space Telescope, we have obtained deep optical images reaching well below the oldest main sequence turnoff in six fields of the Andromeda Galaxy....
The History of Star Formation in Galaxies (2009)
Brown, Thomas M., Postman, Marc, Calzetti, Daniela
If we are to develop a comprehensive and predictive theory of galaxy formation and evolution, it is essential that we obtain an accurate assessment of how and when galaxies assemble their stellar...
The Star Formation Histories of the M31 and M33 Spheroids (2009)
I review the observational constraints on the star formation histories in the spheroids of M33 and M31, the other two spiral galaxies in the Local Group. M33 does not possess a traditional bulge;...
The WFC3 Galactic Bulge Treasury Program: A First Look at Resolved Stellar Population Tools (2008)
Brown, Thomas M., Sahu, Kailash, Zoccali, Manuela, Renzini, Alvio, Ferguson, Henry C., Anderson, Jay, ...
[Abridged] When WFC3 is installed on HST, the community will have powerful new tools for investigating resolved stellar populations. The WFC3 Galactic Bulge Treasury program will obtain deep imaging...
Stellar Proper Motions in the Galactic Bulge from deep HST ACS/WFC Photometry (2008)
Clarkson, Will, Sahu, Kailash, Anderson, Jay, Smith, T. Ed., Brown, Thomas M., Rich, R. Michael, ...
We present stellar proper motions in the Galactic bulge from the Sagittarius Window Eclipsing Extrasolar Search (SWEEPS) project using ACS/WFC on HST. Proper motions are extracted for more than...
The Extended Star Formation History of the Andromeda Spheroid at 35 Kpc on the Minor Axis (2008)
Brown, Thomas M., Beaton, Rachael, Chiba, Masashi, Ferguson, Henry C., Gilbert, Karoline M., Guhathakurta, Puragra, ...
Using the HST ACS, we have obtained deep optical images reaching well below the oldest main sequence turnoff in fields on the southeast minor-axis of the Andromeda Galaxy, 35 kpc from the nucleus....
The Dearth of UV-Bright Stars in M32: Implications for Stellar Evolution Theory (2008)
Brown, Thomas M., Smith, Ed, Ferguson, Henry C., Sweigart, Allen V., Kimble, Randy A., Bowers, Charles W.
Using the Space Telescope Imaging Spectrograph on the Hubble Space Telescope, we have obtained deep far-ultraviolet images of the compact elliptical galaxy M32. When combined with earlier...
The High Velocity Gas toward Messier 5: Tracing Feedback Flows in the Inner Galaxy (2008)
Zech, William F., Lehner, Nicolas, Howk, J. Christopher, Dixon, W. Van Dyke, Brown, Thomas M.
We present Far Ultraviolet Spectroscopic Explorer (FUSE) and Space Telescope Imaging Spectrograph (STIS E140M) observations of the post-asymptotic giant branch star ZNG 1 in the globular cluster...
Planets in the Galactic Bulge: Results from the SWEEPS Project (2007)
Sahu, Kailash C., Casertano, Stefano, Valenti, Jeff, Bond, Howard E., Brown, Thomas M., Smith, T. Ed, ...
The exoplanets discovered so far have been mostly around relatively nearby and bright stars. As a result, the host stars are mostly (i) in the Galactic disk, (ii) relatively massive, and (iii)...
UV Emission from Elliptical Galaxies (2007)
Near And Far, Henry C. Ferguson, Thomas M. Brown
The far-ultraviolet is the most rapidly evolving portion of the spectrum in both very young galaxies and very old galaxies. The "UV upturn" in the spectra of elliptical galaxies shortward...
New Constraints on the Lyman Continuum Escape Fraction at z~1.3 (2007)
Siana, Brian, Teplitz, Harry I., Colbert, James, Ferguson, Henry C., Dickinson, Mark, Brown, Thomas M., ...
We examine deep far-ultraviolet (1600 Angstrom) imaging of the Hubble Deep Field-North (HDFN) and the Hubble Ultra Deep Field (HUDF) to search for leaking Lyman continuum radiation from starburst...
Brown, Thomas M., Smith, Ed, Ferguson, Henry C., Guhathakurta, Puragra, Kalirai, Jasonjot S., Rich, R. Michael, ...
Using the HST ACS, we have obtained deep optical images of a southeast minor-axis field in the Andromeda Galaxy, 21 kpc from the nucleus. In both star counts and metallicity, this field represents a...
Transiting extrasolar planetary candidates in the Galactic bulge (2006)
Sahu, Kailash C., Casertano, Stefano, Bond, Howard E., Valenti, Jeff, Smith, T. Ed, Minniti, Dante, ...
More than 200 extrasolar planets have been discovered around relatively nearby stars, primarily through the Doppler line shifts owing to the reflex motions of their host stars, and more recently...
Brown, Thomas M., Smith, Ed, Ferguson, Henry C., Rich, R. Michael, Guhathakurta, Puragra, Renzini, Alvio, ...
Using the Advanced Camera for Surveys on the Hubble Space Telescope, we have obtained deep optical images reaching stars well below the oldest main sequence turnoff in the spheroid, tidal stream, and...
Brown, Thomas M., Smith, Ed, Guhathakurta, Puragra, Rich, R. Michael, Ferguson, Henry C., Renzini, Alvio, ...
We present a color-magnitude diagram (CMD) for a field in the giant tidal stream of the Andromeda galaxy (M31). These observations, taken with the Advanced Camera for Surveys on the Hubble Space...
Stellar Cluster Fiducial Sequences with the Advanced Camera for Surveys (2005)
Brown, Thomas M., Ferguson, Henry C., Smith, Ed, Guhathakurta, Puragra, Kimble, Randy A., Sweigart, Allen V., ...
We present color-magnitude diagrams of five Galactic globular clusters and one Galactic open cluster spanning a wide range of metallicity (-2.1 < [Fe/H] < +0.3), as observed in the F606W (broad V)...
Army Airspace Control Program of Evaluation Report. (2005)
DeLany,Daniel J., Powell,Benjamin B., Boothe,Robert S., McKee,David L., Brown,Thomas M.
The purpose of the Army Airspace Control Program of Evaluation was to evaluate Army doctrine, procedures, and organization for controlling airspace and to identify materiel needed to implement the...
Age Constraints for an M31 Globular Cluster from Main Sequence Photometry (2004)
Brown, Thomas M., Ferguson, Henry C., Smith, Ed, Kimble, Randy A., Sweigart, Allen V., Renzini, Alvio, ...
We present a color-magnitude diagram (CMD) of the globular cluster SKHB-312 in the Andromeda galaxy (M31), obtained with the Advanced Camera for Surveys on the Hubble Space Telescope. The cluster was...
Star Formation Histories in the Local Group (2004)
Deep color magnitude diagrams extending to the main sequence provide the most direct measure of the detailed star formation history in a stellar population. With large investments of observing time,...
RR Lyrae Stars in the Andromeda Halo from Deep Imaging with the Advanced Camera for Surveys (2004)
Brown, Thomas M., Ferguson, Henry C., Smith, Ed, Kimble, Randy A., Sweigart, Allen V., Renzini, Alvio, ...
We present a complete census of RR Lyrae stars in a halo field of the Andromeda galaxy. These deep observations, taken as part of a program to measure the star formation history in the halo, spanned...
Dixon, W. Van Dyke, Brown, Thomas M., Landsman, Wayne B.
We report observations of the hot post-asymptotic giant branch star ZNG 1 in the globular cluster M5 (NGC 5904) with the Far Ultraviolet Spectroscopic Explorer (FUSE). From the resulting spectrum, we...
The UV Upturn: From M32 to Distant Clusters (2003)
I review the observational constraints on the stars responsible for the upturn in the UV spectra of ellipticals, ranging from galaxies in the local Universe to distant clusters. In nearby galaxies,...
Evidence for Flash Mixing in He-rich sdB Stars (2003)
Sweigart, Allen V., Lanz, Thierry, Brown, Thomas M., Hubeny, Ivan, Landsman, Wayne B.
We present FUSE spectra of three He-rich sdB stars. Two of these stars, PG1544+488 and JL87, reveal extremely strong C III lines, suggesting that they have mixed triple-alpha carbon from the deep...
Flash Mixing on the White Dwarf Cooling Curve: FUSE Observations of three He-rich sdB Stars (2003)
Lanz, Thierry, Brown, Thomas M., Sweigart, Allen V., Hubeny, Ivan, Landsman, Wayne B.
We present FUSE spectra of 3 He-rich sdB stars. Two of these stars, PG1544+488 and JL87, reveal extremely strong C III lines at 977 and 1176A, while the carbon lines are quite weak in the third star,...
The Star Formation History in the Andromeda Halo (2003)
I present the preliminary results of a program to measure the star formation history in the halo of the Andromeda galaxy. Using the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope, we...
Brown, Thomas M., Ferguson, Henry C., Smith, Ed, Kimble, Randy A., Sweigart, Allen V., Renzini, Alvio, ...
We present a color-magnitude diagram (CMD) for a minor-axis field in the halo of the Andromeda galaxy (M31), 51 arcmin (11 kpc) from the nucleus. These observations, taken with the Advanced Camera...
Far-Ultraviolet Emission from Elliptical Galaxies at z=0.33 (2003)
Brown, Thomas M., Ferguson, Henry C., Smith, Ed, Bowers, Charles W., Kimble, Randy A., Renzini, Alvio, ...
We present far-ultraviolet (far-UV) images of the rich galaxy cluster ZwCl1358.1+6245, taken with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope (HST). When combined...
The Hubble Deep Field South Flanking Fields (2002)
Lucas, Ray A., Baum, Stefi A., Brown, Thomas M., Casertano, Stefano, Conselice, Chris, De Mello, Duilia, ...
As part of the Hubble Deep Field South program, a set of shorter 2-orbit observations were obtained of the area adjacent to the deep fields. The WFPC2 flanking fields cover a contiguous solid angle...
Isolating Clusters with Wolf-Rayet Stars in I Zw 18 (2002)
Brown, Thomas M., Heap, Sara R., Hubeny, Ivan, Lanz, Thierry, Lindler, Don
We present UV images and spectra of the starburst galaxy I Zw 18, taken with the Space Telescope Imaging Spectrograph. The high spatial resolution of these data allows us to isolate clusters...
A New Formation Mechanism for the Hottest Horizontal-Branch Stars (2002)
Sweigart, Allen V., Brown, Thomas M., Lanz, Thierry, Landsman, Wayne B., Hubeny, Ivan
Stars with very large mass loss on the red-giant branch can undergo the helium flash while descending the white-dwarf cooling curve. Under these conditions the flash convection zone will mix the...
Using M32 to Study Rapid Phases of Stellar Evolution (2002)
Brown, Thomas M., Ferguson, Henry C., Sweigart, Allen V., Kimble, Randy A., Bowers, Charles W.
The compact elliptical galaxy M32 offers a unique testing ground for theories of stellar evolution. Because of its proximity, solar-blind UV observations can resolve the hot evolved stars in its...
An 8 m successor to the Hubble Space Telescope (HST) would make incredible gains in the study of stellar populations, especially in the Local Group. If diffraction-limited at 0.5 microns, the "Next...
The Origin of Hot Subluminous Horizontal-Branch Stars in Omega Centauri and NGC 2808 (2002)
Sweigart, Allen V., Brown, Thomas M., Lanz, Thierry, Landsman, Wayne B., Hubeny, Ivan
Hot subluminous stars lying up to 0.7 mag below the extreme horizontal branch (EHB) are found in the UV color-magnitude diagrams of omega Cen and NGC 2808. Such stars are unexplained by canonical HB...
Brown, Thomas M., Ferguson, Henry C., O'Connell, Robert W., Ohl, Raymond G.
We present far-UV spectroscopy of the giant elliptical galaxy NGC 1399, obtained with the Far Ultraviolet Spectroscopic Explorer. Of all quiescent ellipticals, NGC 1399 has the strongest known ``UV...
Brown, Thomas M., Sweigart, Allen V., Lanz, Thierry, Landsman, Wayne B., Hubeny, Ivan
We present a UV CMD spanning the hot horizontal branch (HB), blue straggler, and white dwarf populations of the globular cluster NGC 2808. These data were obtained with the Space Telescope Imaging...
A single gene (yes) controls pigmentation of eyes and scales in Heliothis virescens (2001)
Thomas M. Brown, Sae-Youll Cho, Christopher L. Evans, Sujin Park, Satish S. Pimprale, Patricia K. Bryson
A single gene (yes) controls pigmentation of eyes and scales in Heliothis virescens (2001)
Thomas M. Brown, Sae-Youll Cho, Sujin Park, Satish S. Pimprale, Patricia K. Bryson
A yellow-eyed mutant was discovered in a strain of Heliothis virescens, the tobacco budworm, that already exhibited a mutation for yellow scale, y. We investigated the inheritance of these visible...
Ultraviolet Galaxy Counts from STIS Observations of the Hubble Deep Fields (2000)
Gardner, Jonathan P., Brown, Thomas M., Ferguson, Henry C.
We present galaxy counts in the near-ultraviolet (NUV; 2365\AA) and far-ultraviolet (FUV; 1595\AA) obtained from Space Telescope Imaging Spectrograph (STIS) observations of portions of the Hubble...
Brown, Thomas M., Kimble, Randy A., Ferguson, Henry C., Gardner, Jonathan P., Collins, Nicholas R., Hill, Robert S.
Far-UV observations in and near the Hubble Deep Fields demonstrate that the Space Telescope Imaging Spectrograph (STIS) can potentially obtain unique and precise measurements of the diffuse...
Thesis (Ph. D.)--Northern Illinois University, 2000.
Far-UV Emission from Elliptical Galaxies at z=0.55 (1999)
Brown, Thomas M., Bowers, Charles W., Kimble, Randy A., Ferguson, Henry C.
The restframe UV-to-optical flux ratio, characterizing the ``UV upturn'' phenomenon, is potentially the most sensitive tracer of age in elliptical galaxies; models predict that it may change by...
Detection and Photometry of Hot Horizontal Branch Stars in the Core of M32 (1999)
Brown, Thomas M., Bowers, Charles W., Kimble, Randy A., Sweigart, Allen V., Ferguson, Henry C.
We present the deepest near-UV image of M32 to date, which for the first time resolves hot HB stars in an elliptical galaxy. Given the near-solar metallicity of M32, much larger than that of globular...
Measurements of the UV Upturn in Local and Intermediate-Redshift Ellipticals (1999)
The rest-frame UV contains the most sensitive indicators of age for elliptical galaxies. While the near-UV flux from young ellipticals isolates the main sequence turnoff, the far-UV flux in old...
Inhibition of Xenobiotic-Degrading Hydrolases by Organophosphinates. (1998)
Brown, Thomas M., Zimmerman, James K., Bryson, P. K., Grothusen, John R., Joly, James M.
Pretreatment of mice by intramuscular injection of 4-nitrophenyl diphenylphosphinate inhibited 89% of liver carboxylesterase activity in 2h. Hydrolysis of aspirin was not reduced in pretreated mice,...
Inhibition of Xenobiotic-Degrading Hydrolases by Organophosphinates. (1998)
Brown, Thomas M., Bryson, P. K., Grothusen, John R., Joly, James M., Payne, Gregory T.
An abridged synthesis of 4-nitrophenyl diphenylphosphinate is described in which this compound was prepared in two steps. Chromatographic characteristics of four series of 4-nitrophenyl...
Measurements of Far-UV Emission from Elliptical Galaxies at z=0.375 (1998)
Brown, Thomas M., Ferguson, Henry C., Deharveng, Jean-Michel, Jedrzejewski, Robert I.
The ``UV upturn'' is a sharp rise in spectra of elliptical galaxies shortward of rest-frame 2500 A. It is a ubiquitous phenomenon in nearby giant elliptical galaxies, and is thought to arise...
UV Emission from Elliptical Galaxies Near and Far (1997)
Ferguson, Henry C., Brown, Thomas M.
The far-ultraviolet is the most rapidly evolving portion of the spectrum in both very young galaxies and very old galaxies. The ``UV upturn'' in the spectra of elliptical galaxies shortward of 2000...
Dept. of Psychology.
Molecular genetics and evolution of pesticide resistance / Thomas M. Brown, editor (1996)
Brown, Thomas M. (Thomas Miller)
"Developed from a symposium sponsored by the Division of Agrochemicals at the Big Sky Conference VI, held from June 18-23, 1995, at Yellowstone Conference Center and Huntley Lodge in Big Sky, Montana"
Atomic level calculations of the structure and thermodynamics of amorphous copper / (1994)
Printout.
Typescript (photocopy).
Thesis (M.A.)--Johns Hopkins University, 1980.
CANCER INCIDENCE FOLLOWING INFECTIOUS MONONUCLEOSIS (1977)
CARTER, COLEMAN D., BROWN, THOMAS M., HERBERT, JOHN T., HEATH, CLARK W.
By means of a mailed questionnaire, the investigators examined the incidence of cancer among 2282 former college students in whom heterophile-positive infectious mononucleosis (IM) was diagnosed...
Typescript.
A single gene (yes) controls pigmentation of eyes and scales in Heliothis virescens
Brown, Thomas M., Cho, Sae-Youll, Evans, Christopher L., Park, Sujin, Pimprale, Satish S., Bryson, Patricia K.
A yellow-eyed mutant was discovered in a strain of Heliothis virescens, the tobacco budworm, that already exhibited a mutation for yellow scale, y. We investigated the inheritance of these visible...
A single gene (yes) controls pigmentation of eyes and scales in Heliothis virescens
Brown, Thomas M., Cho, Sae-Youll, Evans, Christopher L., Park, Sujin, Pimprale, Satish S., Bryson, Patricia K.
A yellow-eyed mutant was discovered in a strain of Heliothis virescens, the tobacco budworm, that already exhibited a mutation for yellow scale, y. We investigated the inheritance of these visible...