Gorti, Uma, Dullemond, Kees, Hollenbach, David
We present the time evolution of viscously accreting circumstellar disks as they are irradiated by ultraviolet and X-ray photons from a low-mass central star. Our model is a hybrid of a 1D...
Extreme ultraviolet (EUV, 13.6 eV $< h\nu \lta 100$ eV) and X-rays in the 0.1-2 keV band can heat the surfaces of disks around young, low mass stars to thousands of degrees and ionize species with...
Carpenter, John M., Bouwman, Jeroen, Mamajek, Eric E., Meyer, Michael R., Hillenbrand, Lynne A., Backman, Dana E., ...
We present Spitzer photometric (IRAC and MIPS) and spectroscopic (IRS low resolution) observations for 314 stars in the Formation and Evolution of Planetary Systems Legacy program. These data are...
Carpenter, John M., Bouwman, Jeroen, Mamajek, Eric E., Meyer, Michael R., Hillenbrand, Lynne A., Backman, Dana E., ...
We present Spitzer photometric (IRAC and MIPS) and spectroscopic (IRS low resolution) observations for 314 stars in the Formation and Evolution of Planetary Systems (FEPS) Legacy program. These data...
Photoevaporation of Circumstellar Disks by FUV, EUV and X-ray Radiation from the Central Star (2008)
We calculate the rate of photoevaporation of a circumstellar disk by energetic radiation (FUV, 6eV $
Water, O2 and Ice in Molecular Clouds (2008)
Hollenbach, David, Kaufman, Michael J., Bergin, Edwin A., Melnick, Gary J.
We model the temperature and chemical structure of molecular clouds as a function of depth into the cloud, assuming a cloud of constant density n illuminated by an external FUV (6 eV < E < 13.6 eV)...
Line Emission from Gas in Optically Thick Dust Disks around Young Stars (2008)
We present self-consistent models of gas in optically-thick dusty disks and calculate its thermal, density and chemical structure. The models focus on an accurate treatment of the upper layers where...
Chemical Rates on Small Grains and PAHs: C^+ Recombination and H_2 Formation (2008)
Wolfire, Mark G., Hollenbach, David, Kaufman, Michael J.
We use observations of the CI, CII, HI, and H_2 column densities along lines of sight in the Galactic plane to determine the formation rate of H_2 on grains and to determine chemical reaction rates...
The moth : an unusual circumstellar structure associated with HD 61005 (2007)
Hines, Dean C., Schneider, Glenn, Hollenbach, David, Mamajek, Eric E., Hillenbrand, Lynne A., Metchev, Stanimir A., ...
We present the discovery of an unusual spatially resolved circumstellar structure associated with the ≈90 Myr, nearby, G dwarf star HD 61005. Observations from the FEPS Spitzer Legacy Science...
Doug Johnstone, David Hollenbach, John Bally
We present a model for the photoevaporation of circumstellar disks or dense clumps of gas by an external source of ultraviolet radiation. Our model includes the thermal and dynamic e+ects of 613.6 eV...
The dust, planetesimals and planets of HD 38529 (2007)
Moro-Martin, Amaya, Malhotra, Renu, Carpenter, John M., Hillenbrand, Lynne A., Wolf, Sebastian, Meyer, Michael R., ...
HD 38529 is a post-main sequence G8III/IV star (3.5 Gyr old) with a planetary system consisting of at least two planets having Msin(i) of 0.8 MJup and 12.2 MJup, semimajor axes of 0.13 AU and 3.74...
Meyer, Michael R., Hillenbrand, Lynne A., Backman, Dana, Beckwith, Steve, Bouwman, Jeroen, Brooke, Tim, ...
We provide an overview of the Spitzer Legacy Program ``Formation and Evolution of Planetary Systems" (FEPS) which was proposed in 2000, begun in 2001, and executed aboard the Spitzer Space Telescope...
The dust, planetesimals, and planets of HD 38529 (2007)
Moro-Martín, Amaya, Malhotra, Renu, Carpenter, John M., Hillenbrand, Lynne A., Wolf, Sebastian, Meyer, Michael R., ...
HD 38529 is a post-main-sequence G8 III/IV star (3.5 Gyr old) with a planetary system consisting of at least two planets having Msini of 0.8 and 12.2 MJup, semimajor axes of 0.13 and 3.74 AU, and...
Are debris disks and massive planets correlated? (2007)
Moro-Martín, Amaya, Carpenter, John M., Meyer, Michael R., Hillenbrand, Lynne A., Malhotra, Renu, Hollenbach, David, ...
Using data from the Spitzer Space Telescope Legacy Science Program Formation and Evolution of Planetary Systems (FEPS), we have searched for debris disks around nine FGK stars (2-10 Gyr), known from...
The moth: an unusual circumstellar structure associated with HD 61005 (2007)
Hines, Dean C., Schneider, Glenn, Hollenbach, David, Mamajek, Eric E., Hillenbrand, Lynne A., Metchev, Stanimir A., ...
We present the discovery of an unusual spatially resolved circumstellar structure associated with the ~90 Myr, nearby, G dwarf star HD 61005. Observations from the FEPS Spitzer Legacy Science survey...
Dean C. Hines, Glenn Schneider, David Hollenbach, Eric E. Mamajek, Lynne A. Hillenbr, Stanimir A. Metchev, ...
We present the discovery of an unusual spatially resolved circumstellar structure associated with the ≈90 Myr, nearby, G dwarf star HD 61005. Observations from the FEPS Spitzer Legacy Science...
Are Debris Disks and Massive Planets Correlated? (2006)
Moro-Martín, Amaya, Carpenter, John M., Meyer, Michael R., Hillenbrand, Lynne A., Malhotra, Renu, Hollenbach, David, ...
Using data from the Spitzer Space Telescope Legacy Science Program ``Formation and Evolution of Planetary Systems'' (FEPS), we have searched for debris disks around 9 FGK stars (2-10 Gyr), known from...
Pérez-González, Pablo G., Gordon, Karl D., Misselt, Karl A., Gil De Paz, Armando, Engelbracht, Charles W., ...
The recent star formation (SF) in the early-type spiral galaxy M81 is characterized using imaging observations from the far-ultraviolet to the far-infrared. We compare these data with models of the...
Bendo, George J., Dale, Daniel A., Draine, Bruce T., Engelbracht, Charles W., Kennicutt, Robert C., ...
We explore the nature of variations in dust emission within an individual galaxy using 3.6 - 160 micron Spitzer Space Telescope observations and 450 and 850 micron James Clerk Maxwell Telescope...
Perez-Gonzalez, Pablo G., Kennicutt Jr., Robert C., Gordon, Karl D., Misselt, Karl A., De Paz, Armando Gil, Engelbracht, Charles W., ...
The recent star formation (SF) in the early-type spiral galaxy M81 is characterized using imaging observations from the far-ultraviolet (UV) to the far-infrared (IR). We compare these data with...
Bendo, George J., Buckalew, Brent A., Dale, Daniel A., Draine, Bruce T., Joseph, Robert D., ...
We present Spitzer 3.6–160 μm images, Spitzer mid-infrared spectra, and JCMT SCUBA 850 μm images of the Sombrero Galaxy (NGC 4594), an Sa galaxy with a 10^9 M⊙ ; low-luminosity active...
Perez-Gonzalez, Pablo G., Kennicutt Jr., Robert C., Gordon, Karl D., Misselt, Karl A., De Paz, Armando Gil, Engelbracht, Charles W., ...
The recent star formation (SF) in the early-type spiral galaxy M81 is characterized using imaging observations from the far-ultraviolet (UV) to the far-infrared (IR). We compare these data with...
Perez-Gonzalez, Pablo G., Kennicutt Jr., Robert C., Gordon, Karl D., Misselt, Karl A., De Paz, Armando Gil, Engelbracht, Charles W., ...
The recent star formation (SF) in the early-type spiral galaxy M81 is characterized using imaging observations from the far-ultraviolet (UV) to the far-infrared (IR). We compare these data with...
Perez-Gonzalez, Pablo G., Kennicutt Jr., Robert C., Gordon, Karl D., Misselt, Karl A., De Paz, Armando Gil, Engelbracht, Charles W., ...
The recent star formation (SF) in the early-type spiral galaxy M81 is characterized using imaging observations from the far-ultraviolet (UV) to the far-infrared (IR). We compare these data with...
Bendo, George J., Buckalew, Brent A., Dale, Daniel A., Draine, Bruce T., Joseph, Robert D., Kennicutt, Robert C., ...
We present Spitzer 3.6-160 mum images, Spitzer mid-infrared spectra, and JCMT SCUBA 850 mum images of the Sombrero Galaxy (NGC 4594), an Sa galaxy with a 109 Msolar low-luminosity active galactic...
We model gas and dust emission from regions 0.3-20 AU from a central low mass star in intermediate-aged(~10Myr) disks with optically thin dust. The models treat thermal balance and chemistry...
Photoevaporation of Circumstellar Disks due to External FUV Radiation in Stellar Aggregates (2004)
Adams, Fred C., Hollenbach, David, Laughlin, Gregory, Gorti, Uma
When stars form in small groups (N = 100 - 500 members), their circumstellar disks are exposed to little EUV radiation but a great deal of FUV radiation from massive stars in the group. This paper...
Photoevaporation of Clumps in Photodissociation Regions (2002)
We present the results of an investigation of the effects of Far Ultraviolet (FUV) radiation from hot early type OB stars on clumps in star-forming molecular clouds. Clumps in Photodissociation...
Catholics as Citizens: Pastoral Challenges and Opportunities (2000)
Logos: A Journal of Catholic Thought and Culture - Volume 3, Number 4, Fall 2000
Photocopy of typescript. Ann Arbor, Mich. : Xerox University Microfilms, 1976. -- 21 cm.