A Multi-wavelength Differential Imaging Experiment for the High Contrast Imaging Testbed (2009)
Biller, Beth, Trauger, John, Moody, Dwight, Close, Laird, Kuhnert, Andreas, Stapelfeldt, Karl, ...
We discuss the results of a multi-wavelength differential imaging lab experiment with the High Contrast Imaging Testbed (HCIT) at the Jet Propulsion Laboratory. The HCIT combines a Lyot coronagraph...
Performance of the Near-infrared coronagraphic imager on Gemini-South (2008)
Chun, Mark, Toomey, Doug, Wahhaj, Zahed, Biller, Beth, Artigau, Etienne, Hayward, Tom, ...
We present the coronagraphic and adaptive optics performance of the Gemini-South Near-Infrared Coronagraphic Imager (NICI). NICI includes a dual-channel imager for simultaneous spectral difference...
Observing Strategies for the NICI Campaign to Directly Image Extrasolar Planets (2008)
Biller, Beth, Artigau, Etienne, Wahhaj, Zahed, Hartung, Markus, Liu, Michael, Close, Laird M., ...
We discuss observing strategy for the Near Infrared Coronagraphic Imager (NICI) on the 8-m Gemini South telescope. NICI combines a number of techniques to attenuate starlight and suppress...
Coronagraph Workshop papers (2007)
Traub, Wesley A., Abe, Lyu, Angel, Roger, Arenberg, Jon, Balasubramanian, Bala, Baudoz, Pierre, ...
This volume contains the written contributions corresponding to the oral presentations of about 45 authors at the Coronagraph Workshop 2006.
We present the first trigonometric parallax and distance for a young planetary mass object. A likely TW Hya cluster member, 2MASSW J1207334-393254Ab (hereafter 2M1207Ab) is an M8 brown dwarf with a...
NACO-SDI direct imaging search for the exoplanet Eps Eri b (2007)
Janson, Markus, Brandner, Wolfgang, Henning, Thomas, Lenzen, Rainer, McArthur, Barbara, Benedict, G. Fritz, ...
The active K2V star $\epsilon$ Eri hosts the most nearby known extrasolar planet. With an angular separation of about 1" on average, and an age of a few to several hundred Myrs, $\epsilon$ Eri b is...
NACO-SDI direct imaging search for the exoplanet e Eri b (2007)
Janson, Markus, Brandner, Wolfgang, Henning, Thomas, Lenzen, Rainer, McArthur, Barbara, Benedict, G. Fritz, ...
The active K2 V star É Eri hosts the nearest known extrasolar planet. With an angular separation of about 1" on average, and an age of a few to several hundred megayears, É Eri b is one of the...
Ground-based direct imaging of extra-solar planets supported by AO (2006)
Masciadri, Elena, Geissler, Kerstin, Kellner, Stephan, Brandner, Wolfgang, Henning, Thomas, Mundt, Reinhard, ...
Close, Laird M., Lenzen, Rainer, Guirado, Jose C., Nielsen, Eric L., Mamajek, Eric E., Brandner, Wolfgang, ...
Mass is the most fundamental parameter of a star, yet it is also one of the most difficult to measure directly. In general, astronomers estimate stellar masses by determining the luminosity and using...
A novel simultaneous differential imager for the direct imaging of giant planets (2004)
Lenzen, Rainer, Close, Laird, Brandner, Wolfgang, Biller, Beth, Hartung, Markus
Mid-Infrared Imaging of the Post-AGB Star AC Herculis with the MMT Adaptive Optics System (2003)
Close, Laird M., Biller, Beth, Hoffmann, William F., Hinz, Phil M., Bieging, John H., Wildi, Francois, ...
We utilized the MMT's unique deformable secondary adaptive optics system to produce high-resolution (FWHM=0.3"), very high Strehl mid-infrared (9.8, 11.7 & 18 micron) images of the post-AGB star AC...
Close, Laird M., Siegler, Nick, Freed, Melanie, Biller, Beth
Use of the highly sensitive Hokupa'a/Gemini curvature wavefront sensor has allowed direct adaptive optics (AO) guiding on very low mass (VLM) stars with SpT=M8.0-L0.5. A survey of 39 such objects...