238 citations · 658 across the 7 of their papers we have counts for
6 papers
A Spitzer IRAC Imaging Survey for T Dwarf Companions Around M, L, and T Dwarfs: Observations, Results, and Monte Carlo Population Analyses
Joseph Carson, Massimo Marengo, Brian Patten +8
We report observational techniques, results, and Monte Carlo population analyses from a Spitzer Infrared Array Camera imaging survey for substellar companions to 117 nearby M, L, a…
Spitzer/IRAC Limits to Planetary Companions of Fomalhaut and epsilon Eridani
M. Marengo, K. Stapelfeldt, M. W. Werner +5
Fomalhaut and epsilon Eridani are two young, nearby stars that possess extended debris disks whose structures suggest the presence of perturbing planetary objects. With its high se…
Imaging the Cool Hypergiant NML Cygni's Dusty Circumstellar Envelope with Adaptive Optics
M. T. Schuster, M. Marengo, J. L. Hora +6
We present sub-arcsec angular resolution, high-Strehl ratio mid-IR adaptive optics images of the powerful OH/IR source and cool hypergiant NML Cyg at 8.8, 9.8 and 11.7 um. These im…
Spitzer/IRAC Characterization of Galactic AGB Stars
M. Marengo, J. L. Hora, P. Barmby +4
The Spitzer Space Telescope and in particular its InfraRed Array Camera (IRAC) is an ideal facility to study the distribution of AGB stars in our own and other galaxies because of…
Discovery of Two T Dwarf Companions with the Spitzer Space Telescope
K. L. Luhman, B. M. Patten, M. Marengo +12
We report the discovery of T dwarf companions to the nearby stars HN Peg (G0V, 18.4 pc, ~0.3 Gyr) and HD 3651 (K0V, 11.1 pc, ~7 Gyr). During an ongoing survey of 5'x5' fields surro…
The Circumstellar Environments of NML Cyg and the Cool Hypergiants
Michael T. Schuster, Roberta M. Humphreys, Massimo Marengo
We present high-resolution HST WFPC2 images of compact nebulosity surrounding the cool M-type hypergiants NML Cyg, VX Sgr and S Per. The powerful OH/IR source NML Cyg exhibits a pe…