Astrometric planet searches with SIM PlanetQuest (2009)
Beichman, Charles A., Unwin, Stephen C., Shao, Michael, Tanner, Angelle M., Catanzarite, Joseph H., March, Geoffrey W.
SIM will search for planets with masses as small as the Earth's orbiting in the habitable zones' around more than 100 of the stars and could discover many dozen if Earth-like planets are common. With...
Astrometric Detection of Earthlike Planets (2009)
Shao, Michael, Marcy, Geoff, Catanzarite, Joseph H., Edberg, Stephen J., Leger, Alain, Malbet, Fabien, ...
Astrometry can detect rocky planets in a broad range of masses and orbital distances and measure their masses and three-dimensional orbital parameters, including eccentricity and inclination, to...
The SIM PlanetQuest science program (2008)
Edberg, Stephen J., Traub, Wesley A., Unwin, Stephen C.
SIM PlanetQuest (hereafter, just SIM) is a NASA mission to measure the angular positions of stars with unprecedented accuracy. We outline the main astrophysical science programs planned for SIM, and...
SIM planetquest science & technology : a status report (2008)
Edberg, Stephen J., Laskin, Robert A., Marr, James C. -IV, Unwin, Stephen C., Shao, Michael
Optical interferometry will open new vistas for astronomy over the next decade. The Space Interferometry Mission (SIM-PlanetQuest), operating unfettered by the Earth’s atmosphere, will offer...
Taking the Measure of the Universe : precision astrometry with SIM PlanetQuest (2008)
Unwin, Stephen C., Shao, Michael, Tanner, Angelle M., Allen, Ronald J., Beichman, Charles A., Boboltz, David, ...
Precision astrometry at microarcsecond accuracy has application to a wide range of astrophysical problems. This paper is a study of the science questions that can be addressed using an instrument...
Taking the measure of the universe: precision astrometry with SIM PlanetQuest (2008)
Unwin, Stephen C., Shao, Michael, Tanner, Angelle M., Allen, Ronald J., Beichman, Charles A., Boboltz, David, ...
Precision astrometry at microarcsecond accuracy has applications for a wide range of astrophysical problems. This paper is a study of the science questions that can be addressed using an instrument...
Taking the Measure of the Universe: Precision Astrometry with SIM PlanetQuest (2007)
Unwin, Stephen C., Shao, Michael, Tanner, Angelle M., Allen, Ronald J., Beichman, Charles A., Boboltz, David, ...
Precision astrometry at microarcsecond accuracy has application to a wide range of astrophysical problems. This paper is a study of the science questions that can be addressed using an instrument...
Leisawitz, David, Armstrong, Tom, Bender, Chad, Benford, Dominic, Calzetti, Daniella, Carpenter, John, ...
By providing sensitive sub-arcsecond images and integral field spectroscopy in the 25 - 400 micron wavelength range, a far-IR interferometer will revolutionize our understanding of planetary system...
The SIM PlanetQuest science program (2007)
Edberg, Stephen J., Traub, Wesley A., Unwin, Stephen C., Marr, James C. IV
SIM PlanetQuest (hereafter, just SIM) is a NASA mission to measure the angular positions of stars with unprecedented accuracy. We outline the main astrophysical science programs planned for SIM, and...
Terrestrial Planet Finder: science overview (2006)
Unwin, Stephen C., Beichman, C. A.
The Terrestrial Planet Finder (TPF) seeks to revolutionize our understanding of humanity’s place in the universe – by searching for Earth-like planets using reflected light, or thermal emission...
About 150 extrasolar planets, mostly much more massive the Earth, are now known from ground-based observations. Earth-mass planets are very hard, if not impossible, to detect from the ground. The...
Space-based detection of extrasolar planets (2005)
In this paper, we summarize the goals of the next generation of space missions which will study planetary systems around nearby stars.
The Speed and Orientation of the Parsec-Scale Jet in 3C 279 (2003)
Piner, B. Glenn, Unwin, Stephen C., Wehrle, Ann E., Zook, Alma C., Urry, C. Megan, Gilmore, Diane M.
We have calculated inverse-Compton Doppler factors for 3C 279 using the collection of VLBI data recently published by us, and the collection of multiwavelength spectra recently published by Hartman...
Markarian 421's Unusual Satellite Galaxy (1999)
Gorham, Peter W., Van Zee, Liese, Unwin, Stephen C., Jacobs, Christopher S.
We present Hubble Space Telescope (HST) imagery and photometry of the active galaxy Markarian 421 and its companion galaxy 14 arcsec to the ENE. The HST images indicate that the companion is a...