Andrea Ghez

Unveiling a Black Hole at the Center of Our Galaxy (2009)

Ghez, Andrea

More than a quarter century ago, it was suggested that galaxies such as our own Milky Way may harbor massive, though possibly dormant, central black holes. Definitive proof, for or against, the...

The Formation and Evolution of Planetary Systems: The Search for and Characterization of Young Planets (2009)

Beichman, Charles, Baraffe, Isabelle, Crockett, Christopher, Dodson-Robinson, Sarah, Fortney, Jonathan, Ghez, Andrea, ...

Despite the revolution in our knowledge resulting from the detection of planets around mature stars, we know almost nothing about planets orbiting young stars because rapid rotation and active...

SIM PlanetQuest key project precursor observations to detect gas giant planets around young stars (2008)

Tanner, Angelle, Beichman, Charles, Akeson, Rachel, Ghez, Andrea, Grankin, Konstantin N., Herbst, William, ...

We present a review of precursor observing programs for the SIM PlanetQuest Key project devoted to detecting Jupiter mass planets around young stars. In order to ensure that the stars in the sample...

Late-time observations of SN2006gy: Still Going Strong (2008)

Smith, Nathan, Foley, Ryan J., Bloom, Joshua S., Li, Weidong, Filippenko, Alexei V., Gavazzi, Raphael, ...

Owing to its extremely high luminosity and long duration, SN2006gy radiated more energy in visual light than any other known SN. Two hypotheses to explain its high luminosity -- that it was powered...

SIM PlanetQuest Key Project Precursor Observations to Detect Gas Giant Planets Around Young Stars (2007)

Tanner, Angelle, Beichman, Charles, Akeson, Rachel, Ghez, Andrea, Grankin, Konstantin N., Herbst, William, ...

We present a review of precursor observing programs for the SIM PlanetQuest Key project devoted to detecting Jupiter mass planets around young stars. In order to ensure that the stars in the sample...

Pinwheels in the Quintuplet Cluster (2006)

Tuthill, Peter, Monnier, John, Tanner, Angelle, Figer, Donald, Ghez, Andrea, Danchi, William

The five enigmatic Cocoon stars after which the Quintuplet cluster was christened have puzzled astronomers since their discovery. Their extraordinary cool, featureless thermal spectra have been...

Non coeval young multiple systems? On the pairing of protostars and T Tauri stars (2003)

Duchene, Gaspard, Ghez, Andrea, McCabe, Caer

We summarize here the observed properties of ``infrared companions'' to T Tauri stars and argue that their observational properties are identical to those of Class I sources. They may therefore be...