Barbara A. Whitney

Observations of a Compact (<1000 AU) MYSO Cluster with HST (2009)

Janet P. Simpson, Michael G. Burton, Angela S. Cotera, Edwin F. Erickson, Dean C. Hines, ...

Observations show that most, if not all, massive stars form in clusters. This combination of massive stars and clusters has led to the suggestions that massive stars form by coalescence after stellar...

Massive star formation and feedback in W49A: The source of our Galaxy's most luminous water maser outflow (2009)

Smith, Nathan, Whitney, Barbara A., Conti, Peter S., De Pree, Chris G., Jackson, James M.

We present high spatial resolution mid-IR images of the ring of UCHII regions in W49A obtained at Gemini North, allowing us to identify the driving source of its powerful H2O maser outflow. These...

Hubble Space Telescope NICMOS Polarization Observations of Three Edge-on Massive YSOs (2009)

Simpson, Janet P., Burton, Michael G., Colgan, Sean W. J., Cotera, Angela S., Erickson, Edwin F., Hines, Dean C., ...

Massive young stellar objects (YSOs), like low-mass YSOs, appear to be surrounded by optically thick envelopes and/or disks and have regions, often bipolar, that are seen in polarized scattered light...

The Extended Environment of M17: A Star Formation History (2009)

Povich, Matthew S., Churchwell, Ed, Bieging, John H., Kang, Miju, Whitney, Barbara A., Brogan, Crystal L., ...

M17 is one of the youngest and most massive nearby star-formation regions in the Galaxy. It features a bright H II region erupting as a blister from the side of a giant molecular cloud (GMC)....

Low Mass Star Formation in the Taurus-Auriga Clouds (2008)

Kenyon, Scott J., Gomez, Mercedes, Whitney, Barbara A.

We review the history and structure of star formation in the Taurus-Auriga dark clouds. Our discussion includes a summary of the macroscopic cloud properties, the population of single and binary...

Intrinsically Red Sources observed by Spitzer in the Galactic Mid-Plane (2008)

Robitaille, Thomas P., Meade, Marilyn R., Babler, Brian L., Whitney, Barbara A., Johnston, Katharine G., Indebetouw, Remy, ...

We present a highly reliable flux-limited census of 18,949 point sources in the Galactic mid-plane that have intrinsically red mid-infrared colors. These sources were selected from the Spitzer Space...

Interstellar Weather Vanes: GLIMPSE Mid-Infrared Stellar-Wind Bowshocks in M17 and RCW49 (2008)

Povich, Matthew S., Benjamin, Robert A., Whitney, Barbara A., Babler, Brian L., Indebetouw, Remy, Meade, Marilyn R., ...

We report the discovery of six infrared stellar-wind bowshocks in the Galactic massive star formation regions M17 and RCW49 from Spitzer GLIMPSE (Galactic Legacy Infrared Mid-Plane Survey...

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...

Infrared point source variability between the Spitzer and MSX surveys of the Galactic mid-plane (2007)

Robitaille, Thomas P., Cohen, Martin, Whitney, Barbara A., Meade, Marilyn, Babler, Brian, Indebetouw, Remy, ...

We present a list of 552 sources with suspected variability, based on a comparison of mid-infrared photometry from the GLIMPSE I and MSX surveys, which were carried out nearly a decade apart. We were...

The Spitzer Survey of the Small Magellanic Cloud: Discovery of Embedded Protostars in the HII Region NGC 346 (2007)

Simon, Joshua D., Bolatto, Alberto D., Whitney, Barbara A., Robitaille, Thomas P., Shah, Ronak Y., Makovoz, David, ...

We use Spitzer Space Telescope observations from the Spitzer Survey of the Small Magellanic Cloud (S3MC) to study the young stellar content of N66, the largest and brightest HII region in the SMC. In...

Spitzer IRAC observations of newly-discovered planetary nebulae from the Macquarie-AAO-Strasbourg H-alpha Planetary Nebula Project (2007)

Cohen, Martin, Parker, Quentin A., Green, Anne J., Murphy, Tara, Miszalski, Brent, Frew, David J., ...

We compare H-alpha, radio continuum, and Spitzer Space Telescope (SST) images of 58 planetary nebulae (PNe) recently discovered by the Macquarie-AAO-Strasbo- urg H-alpha PN Project (MASH) of the...

Spitzer IRAC observations of newly discovered planetary nebulae from the Macquarie-AAO-Strasbourg Ha Planetary Nebulae Project (2007)

Cohen, Martin, Parker, Quentin A, Watson, Christer, Churchwell, Edward B, Watson, Douglas F, Green, Anne J, ...

We compare Hα, radio continuum, and Spitzer Space Telescope images of 58 planetary nebulae (PNe) recently discovered by the Macquarie-AAO-Strasbourg Hα PN Project (MASH) of the SuperCOSMOS Hα...

Interpreting Spectral Energy Distributions from Young Stellar Objects. II. Fitting observed SEDs using a large grid of pre-computed models (2006)

Robitaille, Thomas P., Whitney, Barbara A., Indebetouw, Remy, Wood, Kenneth

We present a method to analyze the spectral energy distributions (SEDs) of young stellar objects (YSOs). Our approach is to fit data with pre-computed 2-D radiation transfer models spanning a large...

Absolute diffuse calibration of IRAC through mid-infrared and radio study of HII regions (2006)

Cohen, Martin, Green, Anne J., Meade, Marilyn R., Babler, Brian, Indebetouw, Remy, Whitney, Barbara A., ...

We investigate the diffuse absolute calibration of the InfraRed Array Camera on the Spitzer Space Telescope at 8.0microns using a sample of 43 HII regions with a wide range of morphologies near...

Interpreting Spectral Energy Distributions from Young Stellar Objects. I. A grid of 200,000 YSO model SEDs (2006)

Robitaille, Thomas P., Whitney, Barbara A., Indebetouw, Remy, Wood, Kenneth, Denzmore, Pia

We present a grid of radiation transfer models of axisymmetric young stellar objects (YSOs), covering a wide range of stellar masses (from 0.1Msun to 50Msun) and evolutionary stages (from the early...

A Spitzer Space Telescope Infrared Survey of Supernova Remnants in the Inner Galaxy (2005)

Reach, William T., Rho, Jeonghee, Tappe, Achim, Pannuti, Thomas G., Brogan, Crystal L., Churchwell, Edward B., ...

Using Infrared Array Camera (IRAC) images at 3.6, 4.5, 5.8, and 8 microns from the GLIMPSE Legacy science program on the Spitzer Space Telescope, we searched for infrared counterparts to the 95 known...

Observational Properties of Proto-planetary Disk Gaps (2005)

Varniere, Peggy, Bjorkman, J. E., Carciofi, A. C., Whitney, Barbara A., Wood, Kenneth

We study the effects of an annular gap induced by an embedded proto-planet on disk scattered light images and the infrared spectral energy distribution. We find that the outer edge of a gap is...

2-D and 3-D Radiation Transfer Models of High-Mass Star Formation (2005)

Whitney, Barbara A., Robitaille, Thomas P., Indebetouw, Remy, Wood, Kenneth, Bjorkman, J. E., Denzmore, Pia

2-D and 3-D radiation transfer models of forming stars generally produce bluer 1-10 micron colors than 1-D models of the same evolutionary state and envelope mass. Therefore, 1-D models of the...

G313.3+00.3: A New Planetary Nebula discovered by the Australia Telescope Compact Array and the Spitzer Space Telescope (2005)

Cohen, Martin, Green, Anne J., Roberts, Mallory S. E., Meade, Marilyn R., Babler, Brian, Indebetouw, Remy, ...

We present a new planetary nebula, first identified in images from the Australia Telescope Compact Array, although not recognized at that time. Recent observations with the Spitzer Space Telescope...

2-D Models of Protostars: III. Effects of Stellar Temperature (2004)

Whitney, Barbara. A., Indebetouw, Remy, Bjorkman, J. E., Wood, Kenneth

We model how the mid-infrared colors of Young Stellar Objects (YSOs) vary with stellar temperature. The spectral energy distribution (SED) of each object has contributions from thermal emission of...

A Disk Shadow Around the Young Star ASR 41 in NGC 1333 (2003)

Hodapp, Klaus W., Walker, Christina H., Reipurth, Bo, Wood, Kenneth, Bally, John, Whitney, Barbara A., ...

We present images of the young stellar object ASR 41 in the NGC 1333 star forming region at the wavelengths of H_alpha and [SII] and in the I, J, H, and K-bands. ASR 41 has the near-infrared...

2-D Radiative Transfer in Protostellar Envelopes: II. An Evolutionary Sequence (2003)

Whitney, Barbara A., Wood, Kenneth, Bjorkman, J. E., Cohen, Martin

We present model spectral energy distributions, colors, polarization, and images for an evolutionary sequence of a low-mass protostar from the early collapse stage (Class 0) to the remnant disk stage...

The Effect of Multiple Scattering on the Polarization from Binary Star Envelopes. I. Self- and Externally Illuminated Disks (2003)

Hoffman, Jennifer L., Whitney, Barbara A., Nordsieck, Kenneth H.

We present the results of a Monte Carlo radiative transfer code that calculates the polarization produced by multiple Thomson scattering and variable absorptive opacity in a circumstellar disk around...

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...

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...

Can Reflection from Grains Diagnose the Albedo? (2002)

Mathis, John S., Whitney, Barbara A., Wood, Kenneth

By radiation transfer models with a realistic power spectra of the projected density distributions, we show that the optical properties of grains are poorly constrained by observations of reflection...

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...