Spatial Variations of Dust Abundances Across the Large Magellanic Cloud (2009)
Paradis, Déborah, Reach, William T., Bernard, Jean-Philippe, Block, Miwa, Engelbracht, Chad W., Gordon, Karl, ...
Using the data obtained with the Spitzer Space Telescope as part of the Surveying the Agents of a Galaxy's Evolution (SAGE) legacy survey, we have studied the variations of the dust composition and...
Detection of Thermal Emission of XO-2b: Evidence for a Weak Temperature Inversion (2009)
Machalek, Pavel, McCullough, Peter R., Burrows, Adam, Burke, Christopher J., Hora, Joseph L., Johns-Krull, Christopher M.
We estimate flux ratios of the extrasolar planet XO-2b to its host star XO-2 at 3.6, 4.5, 5.8 and 8.0 micron with IRAC on the Spitzer Space Telescope to be 0.00081 +- 0.00017, 0.00098 +- 0.00020,...
Spatial variations of dust abundances across the Large Magellanic Cloud (2009)
Paradis, Deborah, Reach, William T., Bernard, Jean-Philippe, Block, Miwa, Engelbracht, Chad W., Gordon, Karl, ...
Using the data obtained with the Spitzer Space telescope as part of the Surveying the Agents of a Galaxy's Evolution (SAGE) legacy survey, we have studied the variations of the dust composition and...
Srinivasan, Sundar, Meixner, Margaret, Leitherer, Claus, Vijh, Uma, Volk, Kevin, Blum, Robert D., ...
We present empirical relations describing excess emission from evolved stars in the Large Magellanic Cloud (LMC) using data from the SAGE (Surveying the Agents of a Galaxy's Evolution) survey which...
Photometry using the Infrared Array Camera on the Spitzer Space Telescope (2008)
Hora, Joseph L., Carey, Sean, Surace, Jason, Marengo, Massimo, Lowrance, Patrick, Glaccum, William J., ...
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 necessary because of...
Photometry using the Infrared Array Camera on the Spitzer Space Telescope (2008)
Hora, Joseph L., Carey, Sean, Surace, Jason, Marengo, Massimo, Lowrance, Patrick, Glaccum, William J., ...
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 necessary because of...
Bernard, Jean-Philippe, Reach, William T., Paradis, Deborah, Meixner, Margaret, Paladini, Roberta, Kawamura, Akiko, ...
The goal of this paper is to present the results of a preliminary analysis of the extended infrared (IR) emission by dust in the interstellar medium (ISM) of the Large Magellanic Cloud (LMC). We...
Clustered and Triggered Star Formation in W5: Observations with Spitzer (2008)
Koenig, Xavier P., Allen, Lori E., Gutermuth, Robert A., Hora, Joseph L., Brunt, Christopher M., Muzerolle, James
We present images and initial results from our extensive Spitzer Space Telescope imaging survey of the W5 H II region with the Infrared Array Camera (IRAC) and Multiband Imaging Photometer for...
Radio continuum properties of young planetary nebulae (2008)
Cerrigone, L., Umana, G., Trigilio, C., Leto, P., Buemi, C., Hora, Joseph L.
We have selected a small sample of post-AGB stars in transition towards the planetary nebula and present new Very Large Array multi-frequency high-angular resolution radio observations of them. The...
Thermal Emission of Exoplanet XO-1b (2008)
Machalek, Pavel, McCullough, Peter R., Burke, Christopher J., Valenti, Jeff A., Burrows, Adam, Hora, Joseph L.
We estimate flux ratios of the extrasolar planet XO-1b to its host star XO-1 at 3.6, 4.5, 5.8 and 8.0 microns with the IRAC on the Spitzer Space Telescope to be 0.00086 +/- 0.00007, 0.00122 +/-...
Planetary Nebulae: Exposing the Top Polluters of the ISM (2008)
Hora, Joseph L., Marengo, Massimo, Smith, Howard A., Cerrigone, Luciano, Latter, William B.
The high mass loss rates of stars in their asymptotic giant branch (AGB) stage of evolution is one of the most important pathways for mass return from stars to the ISM. In the planetary nebulae (PNe)...
Imaging Circumstellar Environments with a Nulling Interferometer (2007)
Philip M. Hinz, William F. Hoffmann, J. Roger, P. Angel, ...
on, allowing direct detection of warm, Jupiter-size planets and faint zodiacal dust around other nearby stars 5 . With a conventional telescope, the very high contrast ratio needed to resolve a...
Imaging Circumstellar Environments with a Nulling Interferometer (2007)
Philip Hinz, J. Roger, P. Angel, William F. Hoffmann, Patrick C. Mcguire, Matt Cheselka, ...
cancellation, allowing direct detection of warm, Jupiter-size planets and faint zodiacal dust around other nearby stars 5 . With a conventional telescope, the very high contrast ratio needed to...
Surveys with SIRTF and IRAC (2007)
Giovanni G. Fazio, Joseph L. Hora, John R. Stauffer, John R. Stau�er, Peter Eisenhardt
. SIRTF will be the #rst mission to combine the high sensitivity achievable from a cryogenic space telescope with the imaging and spectroscopic power of the new generation of infrared detector...
Joseph L. Hora, Giovanni G. Fazio, Lori E. Allen, Pauline Barmby, ...
The Infrared Array Camera (IRAC) is one of three focal plane instruments in the Space Infrared Telescope Facility (SIRTF). IRAC is a four-channel camera that obtains simultaneous images at 3.6, 4.5,...
Spitzer's View of Planetary Nebulae (2007)
The Spitzer Space Telescope, NASA's Great Observatory for infrared astronomy, has made available new tools for the investigation of the infrared properties of planetary nebulae. The three instruments...
Hora, Joseph L., Patten, Brian M., Fazio, Giovanni G., Glaccum, William J.
The Infrared Array Camera (IRAC) is a four-channel camera on the Spitzer Space Telescope, one of three focal plane science instruments. IRAC uses two pairs of 256x256 pixel InSb and Si:As IBC...
Infrared Observations of The Helix Planetary Nebula (2006)
Hora, Joseph L., Latter, William B., Smith, Howard A., Marengo, Massimo
We have mapped the Helix (NGC 7293) planetary nebula (PN) with the IRAC instrument on the Spitzer Space Telescope. The Helix is one of the closest bright PN, and therefore provides an opportunity to...
Spitzer/IRAC Photometry of M, L, and T Dwarfs (2006)
Patten, Brian M., Stauffer, John R., Burrows, Adam, Marengo, Massimo, Hora, Joseph L., Luhman, Kevin L., ...
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 the behavior of...
Meixner, Margaret, Gordon, Karl D., Indebetouw, Remy, Hora, Joseph L., Whitney, Barbara, Blum, Robert, ...
We are performing a uniform and unbiased, ~7x7 degrees imaging survey of the Large Magellanic Cloud (LMC), using the IRAC and MIPS instruments on board the Spitzer Space Telescope in order to survey...
Infrared Imaging of Planetary Nebulae from the Ground Up (2006)
New ground-based telescopes and instruments, the return of the NICMOS instrument on the Hubble Space Telescope (HST), and the recent launch of the Spitzer Space Telescope have provided new tools that...
Hora, Joseph L., Latter, William B.
The new images presented here have high spatial resolution and are very sensitive to low levels of emission. We compare our new data to existing imaging and spectroscopic data to give clues as to the...
IRAC Observations of Planetary Nebulae (2004)
Hora, Joseph L., Latter, William B., Allen, Lori E., Marengo, Massimo, Deutsch, Lynne K., Pipher, Judith L.
We present the initial results from the Infrared Array Camera (IRAC) imaging survey of planetary nebulae (PN). The IRAC colors of PN are red, especially when considering the 8.0 micron band. Emission...
Mamajek, Eric E., Meyer, Michael R., Hinz, Philip M., Hoffmann, William F., Cohen, Martin, Hora, Joseph L.
We have conducted an N-band survey of 14 young stars in the ~30 Myr-old Tucana-Horologium Association to search for evidence of warm, circumstellar dust disks. Using the MIRAC-BLINC camera on the...
A disrupted circumstellar torus inside eta Carinae's Homunculus Nebula (2002)
Smith, Nathan, Gehrz, Robert D., Hinz, Phillip M., Hoffmann, William F., Mamajek, Eric E., Meyer, Michael R., ...
We present thermal infrared images of the bipolar nebula surrounding eta Carinae at six wavelengths from 4.8 to 24.5 microns. These were obtained with the MIRAC3 camera system at the Magellan...
Hinz, Philip M., Hoffmann, William F., Hora, Joseph L.
Physical models of circumstellar disks surrounding pre-main sequence stars are currently constrained primarily by the spectral energy distribution (SED) of the system. Here we present first results...
Mid-IR Observations of Mira Circumstellar Environment (2001)
Marengo, Massimo, Karovska, Margarita, Fazio, Giovanni G., Hora, Joseph L., Hoffmann, William F., Dayal, Aditya, ...
This paper presents results from high-angular resolution mid-IR imaging of the Mira AB circumbinary environment using the MIRAC3 camera at the NASA Infrared Telescope Facility (IRTF). We resolved the...
Spatial Distributions of Multiple Dust Components in the PPN/PN Dust Shells (2000)
Ueta, Toshiya, Speck, Angela K., Meixner, Margaret, Dayal, Aditya, Hora, Joseph L., Fazio, Giovanni G., ...
We investigate spatial distributions of specific dust components in the circumstellar shells of a proto-planetary nebula candidate, HD 179821, and a planetary nebula, BD$+30^{\circ}$3639, by means of...
Ueta, Toshiya, Meixner, Margaret, Dayal, Aditya, Deutsch, Lynne K., Fazio, Giovanni, Hora, Joseph L., ...
We report detection of an extended mid-infrared emission from \iras 18576+0341 (AFGL 2298). The object shows a dusty circumstellar shell that has diameter of $\age 7\arcsec$ at 10.3 and 18.0 $\um$....
Marengo, Massimo, Jayawardhana, Ray, Fazio, Giovanni G., Hoffmann, William F., Hora, Joseph L., Dayal, Aditya, ...
Most, if not all, stars are now believed to produce energetic outflows during their formation. Yet, almost 20 years after the discovery of bipolar outflows from young stars, the origins of this...
Revealing the Photodissociation Region: Hubble Space Telescope/NICMOS Imaging of NGC 7027 (2000)
Latter, William B., Dayal, Aditya, Bieging, John H., Meakin, Casey, Hora, Joseph L., Kelly, Douglas M., ...
We report results from a Hubble Space Telescope (HST) and Near-Infrared Camera and Multiobject Spectrometer (NICMOS) program to study the distribution of hot neutral (molecular hydrogen) and ionized...
HST/NICMOS Imaging of the Planetary Nebula Hubble 12 (2000)
Hora, Joseph L., Latter, William B., Dayal, Aditya, Bieging, John, Kelly, Douglas M., ...
Images of Hubble 12 were obtained with the HST/NICMOS instrument in the F110W, F164N, and F166N filters of NIC1, and the F160W, F187N, F190N, F212N, F215N filters of NIC2. The images show the...
Calibration and performance of the Infrared Array Camera (IRAC) (2000)
Joseph L. Hora, Giovanni G. Fazio, Steven P. Willner, Jiasheng Huang, ...
The Infrared Array Camera (IRAC) is one of three focal plane instruments in the Space Infrared Telescope Facility (SIRTF). IRAC is a four-channel camera that obtains simultaneous images at 3.6, 4.5,...
Investigating the Near-Infrared Properties of Planetary Nebula II. Medium Resolution Spectra (1999)
Hora, Joseph L., Latter, William B., Deutsch, Lynne K.
We present medium-resolution (R~700) near-infrared (lambda = 1 - 2.5 micron) spectra of a sample of planetary nebulae (PNe). A narrow slit was used which sampled discrete locations within the...
A Mid-Infrared Imaging Survey of Proto-Planetary Nebula Candidates (1998)
Meixner, Margaret, Ueta, Toshiya, Dayal, Aditya, Hora, Joseph L., Fazio, Giovanni, Hrivnak, Bruce J., ...
We present the data from a mid-infrared imaging survey of 66 proto-planetary nebula candidates using two mid-IR cameras (MIRAC2 and Berkcam) at the NASA Infrared Telescope Facility and the United...
Near-Infrared Spectroscopy of Molecular Filaments in the Reflection Nebula NGC 7023 (1997)
Martini, Paul, Sellgren, K., Hora, Joseph L.
We present near-infrared spectroscopy of fluorescent molecular hydrogen (H_2) emission from molecular filaments in the reflection nebula NGC 7023. We derive the relative column densities of H_2...
A Butterfly in the Making: Revealing the Near- Infrared Structure of Hubble 12 (1995)
Hora, Joseph L., Latter, William B.
We present deep narrowband near-IR images and moderate resolution spectra of the young planetary nebula Hubble 12. These data are the first to show clearly the complex structure for this important...
Investigating the Near-Infrared Properties of Planetary Nebulae. I. Narrowband Images (1995)
Latter, William B., Kelly, Douglas M., Hora, Joseph L., Deutsch, Lynne K.
We present the results of a near-infrared narrowband imaging survey of planetary nebulae. Objects were selected in a way that complements similar surveys done at visible and near-infrared...
Hora, Joseph L., Latter, William B.
High-resolution near-infrared images and moderate resolution spectra were obtained of the bipolar nebulae M~2--9 and AFGL 2688. The ability to spatially and spectrally resolve the various components...