McGuire, Patrick C., Bishop, Janice L., Brown, Adrian J., Fraeman, Abigail A., Marzo, Giuseppe A., Morgan, M. Frank, ...
The observations of Mars by the CRISM and OMEGA hyperspectral imaging spectrometers require correction for photometric, atmospheric and thermal effects prior to the interpretation of possible...
P. G. Martin, Geoffrey C. Clayton, Michael J. Wolff
Using recent measurements of ultraviolet interstellar polarization, we have examined its relationship to ultraviolet extinction and to polarization and extinction measurements in the visible and...
THE ASTROPHYSICAL JOURNAL, 556 958969, 2001 August 1 V (2007)
The American Astronomical, Angela S. Cotera, Barbara A. Whitney, Erick Young, Michael J. Wolff, Kenneth Wood, ...
We present Hubble Space Telescope near-infrared camera and multiobject spectrometer observations of the reection nebulosity associated with the T Tauri star HH 30. The images show the scattered-light...
FUSE Measurements of Far Ultraviolet Extinction. II. Magellanic Cloud Sight Lines (2005)
Cartledge, Stefan I. B., Clayton, Geoffrey C., Gordon, Karl D., Rachford, Brian L., Draine, B. T., Martin, P. G., ...
We present an extinction analysis of 9 paths through the LMC and SMC based on FUSE observations. To date, just two LMC sight lines have probed dust grain composition and size distributions in the...
Measuring Extinction Curves of Lensing Galaxies (2005)
McGough, Christina, Clayton, Geoffrey C., Gordon, Karl D., Wolff, Michael J.
We critique the method of constructing extinction curves of lensing galaxies using multiply imaged QSOs. If one of the two QSO images is lightly reddened or if the dust along both sightlines has the...
Interstellar Polarization in M31 (2004)
Clayton, Geoffrey C., Wolff, Michael J., Gordon, Karl D., Smith, Paul S., Nordsieck, Kenneth H., Babler, Brian L.
The wavelength dependence of interstellar polarization due to dust in M31 has been observed along four sightlines. Only one sightline had been measured previously.The globular clusters, S78, S150,...
GLIMPSE: I. A SIRTF Legacy Project to Map the Inner Galaxy (2003)
Benjamin, Robert A., Churchwell, E., Babler, Brian L., Bania, T. M., Clemens, Dan P., Cohen, Martin, ...
GLIMPSE (Galactic Legacy Infrared Mid-Plane Survey Extraordinaire), a SIRTF Legacy Science Program, will be a fully sampled, confusion-limited infrared survey of the inner two-thirds of the Galactic...
A Quantitative Comparison of SMC, LMC, and Milky Way UV to NIR Extinction Curves (2003)
Gordon, Karl D., Clayton, Geoffrey C., Misselt, K. A., Landolt, Arlo U., Wolff, Michael J.
We present an exhaustive, quantitative comparison of all of the known extinction curves in the Small and Large Magellanic Clouds (SMC and LMC) with our understanding of the general behavior of Milky...
Clayton, Geoffrey C., Gordon, Karl D., Witt, Adolf N., Allamandola, L. J., Martin, Peter G., Salama, F., ...
We have obtained new STIS/HST spectra to search for structure in the ultraviolet interstellar extinction curve, with particular emphasis on a search for absorption features produced by polycyclic...
2-D Radiative Transfer in Protostellar Envelopes: I. Effects of Geometry on Class I Sources (2003)
Whitney, Barbara A., Wood, Kenneth, Bjorkman, J. E., Wolff, Michael J.
We present 2-D radiation transfer models of Class I Protostars and show the effect of including more realistic geometries on the resulting spectral energy distributions and images. We begin with a...
Dust Grain-Size Distributions From MRN to MEM (2003)
Clayton, Geoffrey C., Wolff, Michael J., Sofia, Ulysses J., Gordon, K. D., Misselt, K. A.
Employing the Maximum Entropy Method algorithm, we fit interstellar extinction measurements which span the wavelength range 0.125-3 micron. We present a uniform set of MEM model fits, all using the...
A New Feature in the Interstellar Extinction Curve at 2700 A: Diamonds in the Rough? (2002)
Clayton, Geoffrey C., Gordon, Karl D., Witt, Adolf N., Allamandola, L. J., Martin, Peter G., Salama, F., ...
Space Telescope Imaging Spectrograph (STIS) and archival International Ultraviolet Explorer (IUE) data were used to search for structure in the ultraviolet interstellar extinction curve. Between 1250...
Infrared Signatures of Protoplanetary Disk Evolution (2001)
Wood, Kenneth, Lada, C. J., Bjorkman, J. E., Kenyon, Scott J., Whitney, Barbara, Wolff, Michael J.
We investigate the observational signatures of a straightforward evolutionary scenario for protoplanetary disks in which the disk mass of small (50 micron) particles decreases homologously with time,...
Wood, Kenneth, Wolff, Michael J., Bjorkman, J. E., Whitney, Barbara
We present spectral energy distribution (SED) models for the edge-on classical T Tauri star HH30 IRS that indicate dust grains have grown to larger than 50 microns within its circumstellar disk. The...
Wood, Kenneth, Smith, David, Whitney, Barbara, Stassun, Keivan, Kenyon, Scott J., Wolff, Michael J., ...
Ground based imaging, imaging polarimetry, and recent Hubble Space Telescope WFPC2 and NICMOS images of protostars have revealed very complex scattered light patterns that cannot be entirely...
Magellanic-Cloud-Type Interstellar Dust Along Low Density Sightlines in the Galaxy (2000)
Clayton, Geoffrey C., Gordon, Karl D., Wolff, Michael J.
We have studied the UV extinction properties along 30 Galactic sightlines using data from the International Ultraviolet Explorer (IUE) archive that have never been previously examined. These distant...
Forming the Dusty Ring in HR 4796A (1999)
Kenyon, Scott J., Wood, Kenneth, Whitney, Barbara A., Wolff, Michael J.
We describe planetesimal accretion calculations for the dusty ring observed in the nearby A0 star HR 4796A. Models with initial masses of 10-20 times the minimum mass solar nebula produce a ring of...
The Ever Changing Circumstellar Nebula Around UW Centauri (1999)
Clayton, Geoffrey C., Kerber, F., Gordon, Karl D., Lawson, Warrick A., Wolff, Michael J., Pollacco, D. L., ...
We present new images of the reflection nebula surrounding the R Coronae Borealis Star, UW Cen. This nebula, first detected in 1990, has changed its appearance significantly. At the estimated...
Ultraviolet Interstellar Linear Polarization. III. Features (1997)
Michael J. Wolff, Geoffrey C. Clayton, P. G. Martin, Christopher M. Anderson
Astro-2 has revealed a broad, weak spectral feature in the ultraviolet interstellar linear polarization for two lines of sight, conrming the original detection toward HD 197770 and adding HD 1479334....