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Photometry using the Infrared Array Camera on the Spitzer Space Telescope
Joseph L. Hora, Sean Carey, Jason Surace +13
We present several corrections for point source photometry to be applied to data from the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. These corrections are necessa…
New Young Brown Dwarfs in the Orion Molecular Cloud 2/3 Region
Dawn E. Peterson, S. T. Megeath, K. L. Luhman +7
Forty new low mass members with spectral types ranging from M4-M9 have been confirmed in the Orion Molecular Cloud 2/3 region. Through deep, I, z', J, H, K photometry of a 20' x 20…
Spitzer IRAC and MIPS Imaging of Clusters and Outflows in 9 High-mass Star Forming Regions
Keping Qiu, Qizhou Zhang, S. Thomas Megeath +6
We present Spitzer Space Telescope IRAC and MIPS observations toward a sample of nine high-mass star forming regions at a distance of around 2 kpc. Based on IRAC and MIPS 24 m p…
The Broadband Infrared Emission Spectrum of the Exoplanet HD 189733b
David Charbonneau, Heather A. Knutson, Travis Barman +5
We present Spitzer Space Telescope time series photometry of the exoplanet system HD 189733 spanning two times of secondary eclipse, when the planet passes out of view behind the p…
The Spitzer Gould Belt Survey of Large Nearby Interstellar Clouds: Discovery of a Dense Embedded Cluster in the Serpens-Aquila Rift
R. A. Gutermuth, T. L. Bourke, L. E. Allen +12
We report the discovery of a nearby, embedded cluster of young stellar objects, associated filamentary infrared dark cloud, and 4.5 micron shock emission knots from outflows detect…
Kinematic Structure of the Orion Nebula Cluster and its Surroundings
Gabor Furesz, Lee W. Hartmann, S. Thomas Megeath +2
We present results from 1351 high resolution spectra of 1215 stars in the Orion Nebula Cluster (ONC) and the surrounding Orion 1c association, obtained with the Hectochelle multiob…
Spitzer, Near-Infrared, and Submillimeter Imaging of the Relatively Sparse Young Cluster, Lynds 988e
Thomas S. Allen, Judith L. Pipher, Robert A. Gutermuth +7
We present {\it Spitzer} images of the relatively sparse, low luminosity young cluster L988e, as well as complementary near-infrared (NIR) and submillimeter images of the region. T…
The 3.6-8.0 Micron Broadband Emission Spectrum of HD 209458b: Evidence for an Atmospheric Temperature Inversion
Heather A. Knutson, David Charbonneau, Lori E. Allen +2
We estimate the strength of the bandpass-integrated thermal emission from the extrasolar planet HD 209458b at 3.6, 4.5, 5.8, and 8.0 microns using the Infrared Array Camera (IRAC)…
Infrared Extinction Toward Nearby Star-Forming Regions
K. M. Flaherty, J. L. Pipher, S. T. Megeath +4
We present an independent estimate of the interstellar extinction law for the Spitzer IRAC bands as well as a first attempt at extending the law to the 24micron MIPS band. The sour…
Hot ammonia in NGC6334I & I(N)
H. Beuther, A. J. Walsh, S. Thorwirth +4
Aims: The massive twin cores NGC6334I and I(N) are in different evolutionary stages and hence ideal targets to study evolutionary variations within the same larger-scale environmen…
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…
A Sensitive Search for Variability in Late L Dwarfs: The Quest for Weather
M. Morales-Calderon, J. R. Stauffer, J. Davy Kirkpatrick +10
We have conducted a photometric monitoring program of 3 field late-L brown dwarfs looking for evidence of non-axisymmetric structure or temporal variability in their photospheres.…
Spitzer/IRAC Photometry of M, L, and T Dwarfs
Brian M. Patten, John R. Stauffer, Adam Burrows +9
We present the results of a program to acquire photometry for eighty-six late-M, L, and T dwarfs using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We examine t…
{Millimeter Multiplicity in NGC 6334 I and I(N)
T. R. Hunter, C. L. Brogan, S. T. Megeath +3
Using the Submillimeter Array (SMA), we have imaged the 1.3 millimeter continuum emission at the center of the massive star-forming regions NGC 6334 I and I(N). In both regions, th…
A Spitzer/IRAC Search for Substellar Companions of the Debris Disk Star epsilon Eridani
M. Marengo, S. T. Megeath, G. G. Fazio +3
We have used the InfraRed Array Camera (IRAC) onboard the Spitzer Space telescope to search for low mass companions of the nearby debris disk star epsilon Eridani. The star was obs…
24-micron Detections of Disks around Very Low-mass Stars and Brown Dwarfs in IC 348: Grain Growth/Settling and Inner Holes?
James Muzerolle, Lucia Adame, Paola D'Alessio +11
We present observations of six late-type members of the young cluster IC 348 detected at 24 microns with the Multiband Imaging Photometer for Spitzer(MIPS). At least four of the ob…
The Structure and Evolution of Young Stellar Clusters
L. Allen, S. T. Megeath, R. Gutermuth +6
We examine the properties of embedded clusters within 1 kiloparsec using new data from the Spitzer Space Telescope, as well as recent results from 2MASS and other ground-based near…
Discovery of a Planetary-Mass Brown Dwarf with a Circumstellar Disk
K. L. Luhman, Lucia Adame, Paola D'Alessio +4
Using the Hubble Space Telescope, the 4 m Blanco telescope at the Cerro Tololo Inter-American Observatory, and the Spitzer Space Telescope, we have performed deep imaging from 0.8…
Identifying Primordial Substructure in NGC 2264
Paula S. Teixeira, Charles J. Lada, Erick T. Young +8
We present new Spitzer Space Telescope observations of the young cluster NGC2264. Observations at 24 micron with the Multiband Imaging Photometer has enabled us to identify the mos…
Spitzer/IRAC Photometry of the Eta Chameleontis Association
S. T. Megeath, L. Hartmann, K. L. Luhman +1
We present IRAC 3.6, 4.5, 5.8 and 8 micron photometry for the 17 A, K and M type members of the Eta Chameleontis association. These data show infrared excesses toward six of the 15…
The Disk Fractions of Brown Dwarfs in IC 348 and Chamaeleon I
K. L. Luhman, C. J. Lada, L. Hartmann +7
Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry for 25 and 18 low-mass members of the IC 348 and Chamaeleon I st…
UBVRI Light Curves of 44 Type Ia Supernovae
Saurabh Jha, Robert P. Kirshner, Peter Challis +2
We present UBVRI photometry of 44 type-Ia supernovae (SN Ia) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the…
A Spitzer/IRAC Survey of Massive Star-Forming Regions
L. E. Allen, J. L. Hora, S. T. Megeath +4
We are conducting a survey of several regions of high-mass star formation to assess their content and structure. The observations include Spitzer observations, ground-based optical…
A Spitzer/IRAC Survey of the Orion Molecular Clouds
S. T. Megeath, K. M. Flaherty, J. Hora +9
We present initial results from a survey of the Orion A and B molecular clouds made with the InfraRed Array Camera (IRAC) onboard the Spitzer Space Telescope. This survey encompass…