Publications (28)
The SOFIA Massive (SOMA) Star Formation Survey. IV. Isolated Protostars
Ruben Fedriani, Jonathan C. Tan, Zoie Telkamp +13
We present m SOFIA-FORCAST images of 11 isolated protostars as part of the SOFIA Massive (SOMA) Star Formation Survey, with this morphological classification based o…
The Science Case for the Planet Formation Imager (PFI)
Stefan Kraus, John Monnier, Tim Harries +16
Among the most fascinating and hotly-debated areas in contemporary astrophysics are the means by which planetary systems are assembled from the large rotating disks of gas and dust…
Fundamental parameters, integrated RGB mass loss and dust production in the Galactic globular cluster 47 Tucanae
Iain McDonald, Martha L. Boyer, Jacco Th. van Loon +12
Fundamental parameters and time-evolution of mass loss are investigated for post-main-sequence stars in the Galactic globular cluster 47 Tucanae (NGC 104). This is accomplished by…
Optical Variability of the T Tauri Star HH30
Kenneth Wood, Scott Wolk, K. Z. Stanek +4
We report results of VRI photometric monitoring of the T Tauri star plus disk system HH30. We find that HH30 is highly variable over timescales of a few days with Delta V~1.5 mag,…
The SOFIA Massive (SOMA) Star Formation Survey. II. High Luminosity Protostars
Mengyao Liu, Jonathan C. Tan, James M. De Buizer +6
We present multi-wavelength images observed with SOFIA-FORCAST from 10 to 40 m of seven high luminosity massive protostars, as part of the SOFIA Massive (SOMA) Star Forma…
Warm and Dense Molecular Gas in the N159 Region: 12CO J=4-3 and 13CO J=3-2 Observations with NANTEN2 and ASTE
Yoji Mizuno, Akiko Kawamura, Toshikazu Onishi +29
New 12CO J=4-3 and 13CO J=3-2 observations of the N159 region in the Large Magellanic Cloud have been made. The 12CO J=4-3 distribution is separated into three clumps. These new me…
Infrared Signatures of Protoplanetary Disk Evolution
Kenneth Wood, C. J. Lada, J. E. Bjorkman +3
We investigate the observational signatures of a straightforward evolutionary scenario for protoplanetary disks in which the disk mass of small (50 micron) particles decreases homo…
Panchromatic Spectral Energy Distributions of Dusty Galaxies with RADISHE. I. Predictions for Herschel: Correlating Colors with Galactic Energy Sources
Sukanya Chakrabarti, Barbara Whitney
We present three-dimensional, self-consistent radiative transfer solutions with a new Monte Carlo radiative equilibrium code. The code, RADISHE (iative transfer n…
The SOFIA Massive (SOMA) Star Formation Survey. I. Overview and First Results
James M. De Buizer, Mengyao Liu, Jonathan C. Tan +6
We present an overview and first results of the Stratospheric Observatory For Infrared Astronomy Massive (SOMA) Star Formation Survey, which is using the FORCAST instrument to imag…
Emission from Very Small Grains and PAH Molecules in Monte Carlo Radiation Transfer Codes: Application to the Edge-On Disk of Gomez's Hamburger
Kenneth Wood, Barbara Whitney, Thomas Robitaille +1
We have modeled optical to far infrared images, photometry, and spectroscopy of the object known as Gomez's Hamburger. We reproduce the images and spectrum with an edge-on disk of…
Modeling the Photopolarimetric Variability of AA Tau
Mark O'Sullivan, Michael Truss, Christina Walker +4
We present Monte Carlo scattered light models of a warped disk that reproduce the observed photopolarimetric variability of the classical T Tauri star AA Tau. For a system inclinat…
Surveying the Agents of Galaxy Evolution in the Tidally-Stripped, Low Metallicity Small Magellanic Cloud (SAGE-SMC) II. Cool Evolved Stars
Martha L. Boyer, Sundar Srinivasan, Jacco Th. van Loon +17
We investigate the infrared (IR) properties of cool, evolved stars in the Small Magellanic Cloud (SMC), including the red giant branch (RGB) stars and the dust-producing red superg…
Scattered Light Models of Protostellar Envelopes: Multiple Outflow Cavities and Misaligned Circumstellar Disks
Kenneth Wood, David Smith, Barbara Whitney +4
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 b…
Dust Production and Mass Loss in the Galactic Globular Cluster NGC 362
Martha L. Boyer, Iain McDonald, Jacco Th. van Loon +14
We investigate dust production and stellar mass loss in the Galactic globular cluster NGC 362. Due to its close proximity to the Small Magellanic Cloud (SMC), NGC 362 was imaged wi…
Effects of diffuse background emission and source crowding on photometric completeness in Spitzer Space Telescope IRAC surveys: The GLIMPSE Catalogs and Archives
Chip Kobulnicky, Brian Babler, Michael Alexander +3
We characterize the completeness of point source lists from Spitzer Space Telescope surveys in the four Infrared Array Camera (IRAC) bandpasses, emphasizing the Galactic Legacy Inf…
The Spectral Energy Distribution of HH30 IRS: Constraining The Circumstellar Dust Size Distribution
Kenneth Wood, Michael J. Wolff, J. E. Bjorkman +1
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 circu…
CSI 2264: Characterizing Accretion-Burst Dominated Light Curves for Young Stars in NGC 2264
John Stauffer, Ann Marie Cody, Annie Baglin +25
Based on more than four weeks of continuous high cadence photometric monitoring of several hundred members of the young cluster NGC 2264 with two space telescopes, NASA's Spitzer a…
CSI 2264: Simultaneous optical and infrared light curves of young disk-bearing stars in NGC 2264 with CoRoT and Spitzer-- evidence for multiple origins of variability
Ann Marie Cody, John Stauffer, Annie Baglin +42
We present the Coordinated Synoptic Investigation of NGC 2264, a continuous 30-day multi-wavelength photometric monitoring campaign on more than 1000 young cluster members using 16…
A Panchromatic View OF NGC 602: Time-Resolved Star Formation with the Hubble and Spitzer Space Telescopes
Lynn Redding Carlson, Marta Sewilo, Margaret Meixner +16
We present the photometric catalogs for the star-forming cluster NGC 602 in the wing of the Small Magellanic Cloud covering a range of wavelengths from optical HST/ACS (F555W, F814…
The Structure of Brown Dwarf Circumstellar Disks
Christina Walker, Kenneth Wood, C. J. Lada +3
We present synthetic spectra for circumstellar disks that are heated by radiation from a central brown dwarf. Under the assumption of vertical hydrostatic equilibrium, our models y…
The Structure of Pre-transitional Protoplanetary Disks I: Radiative Transfer Modeling of the Disk+Cavity in the PDS 70 system
Ruobing Dong, Jun Hashimoto, Roman Rafikov +49
Through detailed radiative transfer modeling, we present a disk+cavity model to simultaneously explain both the SED and Subaru H-band polarized light imaging for the pre-transition…
Mapping H-band Scattered Light Emission in the Mysterious SR21 Transitional Disk
Katherine B. Follette, Motohide Tamura, Jun Hashimoto +50
We present the first near infrared (NIR) spatially resolved images of the circumstellar transitional disk around SR21. These images were obtained with the Subaru HiCIAO camera, ada…
A Massive Protostar Forming by Ordered Collapse of a Dense, Massive Core
Yichen Zhang, Jonathan C. Tan, James M. De Buizer +8
We present 30 and 40 micron imaging of the massive protostar G35.20-0.74 with SOFIA-FORCAST. The high surface density of the natal core around the protostar leads to high extinctio…
Observational Signatures of Planets in Protoplanetary Disks I: Gaps Opened by Single and Multiple Young Planets in Disks
Ruobing Dong, Zhaohuan Zhu, Barbara Whitney
It has been suggested that the gaps and cavities recently discovered in transitional disks are opened by planets. To explore this scenario, we combine two-dimensional two fluid (ga…
Spitzer Analysis of HII Region Complexes in the Magellanic Clouds: Determining a Suitable Monochromatic Obscured Star Formation Indicator
Brandon Lawton, Karl D. Gordon, Brian Babler +18
HII regions are the birth places of stars, and as such they provide the best measure of current star formation rates (SFRs) in galaxies. The close proximity of the Magellanic Cloud…
The Mass-Loss Return From Evolved Stars to the LMC: Empirical Relations for Excess Emission at 8 and 24 μm
Sundar Srinivasan, Margaret Meixner, Claus Leitherer +18
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 Evolut…
Spitzer Survey of the Large Magellanic Cloud, Surveying the Agents of a Galaxy's Evolution (SAGE) I: Overview and Initial Results
Margaret Meixner, Karl D. Gordon, Remy Indebetouw +46
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…
The SOFIA Massive (SOMA) Star Formation Survey. III. From Intermediate- to High-Mass Protostars
Mengyao Liu, Jonathan C. Tan, James M. De Buizer +9
We present m SOFIA-FORCAST images of 14 intermediate-mass protostar candidates as part of the SOFIA Massive (SOMA) Star Formation Survey. We build spectral energy di…