H. B. Hammel

Worlds Beyond: A Strategy for the Detection and Characterization of Exoplanets Executive Summary of a Report of the ExoPlanet Task Force Astronomy and Astrophysics Advisory Committee Washington, DC June 23, 2008 (2008)

Lunine, Jonathan I., Fischer, Debra, Hammel, H. B., Henning, Thomas, Hillenbrand, Lynne, Kasting, James, ...

[No abstract]

CLOUDS search for variability in brown dwarf atmospheres (2008)

Goldman, B., Cushing, M. C., Marley, M. S., Artigau, É., Baliyan, K. S., Béjar, V. J. S., ...

Context. L-type ultra-cool dwarfs and brown dwarfs have cloudy atmospheres that could host weather-like phenomena. The detection of photometric or spectral variability would provide insight into...

CLOUDS search for variability in brown dwarf atmospheres (2008)

Goldman, B., Cushing, M. C., Marley, M. S., Artigau, É., Baliyan, K. S., Béjar, V. J. S., ...

Context: L-type ultra-cool dwarfs and brown dwarfs have cloudy atmospheres that could host weather-like phenomena. The detection of photometric or spectral variability would provide insight into...

Worlds beyond: a strategy for the detection and characterization of exoplanets executive summary of a report of the exoplanet task force astronomy and Astrophysics Advisory Committee Washington, DC June 23, 2008 (2008)

Lunine, Jonathan I., Fischer, Debra, Hammel, H. B., Henning, Thomas, Hillenbrand, Lynne, Kasting, James, ...

Not Available

CLOUDS search for variability in brown dwarf atmospheres. Infrared spectroscopic time series of L/T transition brown dwarfs (2008)

Goldman, B., Cushing, M. C., Marley, M. S., Artigau, É, Baliyan, K. S., Béjar, V. J. S., ...

Context: L-type ultra-cool dwarfs and brown dwarfs have cloudy atmospheres that could host weather-like phenomena. The detection of photometric or spectral variability would provide insight into...

Variability of Disk Emission in Pre-Main Sequence and Related Stars. I. HD 31648 and HD 163296 - Isolated Herbig Ae Stars Driving Herbig-Haro Flows (2007)

Sitko, M. L., Carpenter, W. J., Kimes, R. L., Wilde, J. L., Lynch, D. K., Russell, R. W., ...

Infrared photometry and spectroscopy covering a time span of a quarter century are presented for HD 31648 (MWC 480) and HD 163296 (MWC 275). Both are isolated Herbig Ae stars that exhibit signs of...

The 2003 Nov 14 occultation by Titan of TYC 1343-1865-1. II. Analysis of light curves (2007)

Zalucha, A., Fitzsimmons, A., Elliot, J. L., Thomas-Osip, J., Hammel, H. B., Dhillon, V. S., ...

We observed a stellar occultation by Titan on 2003 November 14 from La Palma Observatory using ULTRACAM with three Sloan filters: u', g', and i' (358, 487, and 758 nm, respectively). The occultation...

Mid-Infrared Ethane Emission on Neptune and Uranus (2006)

Hammel, H. B., Lynch, D. K., Russell, R. W., Sitko, M. L., Bernstein, L. S., Hewagama, T.

We report 8- to 13-micron spectral observations of Neptune and Uranus from the NASA Infrared Telescope Facility spanning more than a decade. The spectroscopic data indicate a steady increase in...

Uranus nears Equinox A report from the 2006 Pasadena Workshop (2006)

Photoillustration Mark, Showalter Hst, Heidi B. Hammel, H. B. Hammel

Statement adopted by the attendees of the workshop Once every 42 years, we have an opportunity to see the planet Uranus and its moons from pole to pole, and to view its ring system edge on. That...

Long-term variations in the microwave brightness temperature of the Uranus atmosphere (2004)

Klein, M. J., Hofstadter, M. D., Hammel, H. B., Leflang, J. G., Roller, J. P., McLeod, R. K.

Seasonal changes in the microwave brightness temperature of the Uranus atmosphere (2004)

Klein, M. J., Hofstadter, M. D., Hammel, H. B., Leflang, J. G., Roller, J. P., McLeod, R. K.