Outflows and Massive Stars in the protocluster IRAS 05358+3543 (2009)
Ginsburg, Adam G., Bally, John, Yan, Chi-Hung, Williams, Jonathan P.
We present new near-IR H2, CO J=2-1, and CO J = 3-2 observations to study outflows in the massive star forming region IRAS 05358+3543. The Canada-France-Hawaii Telescope H2 images and James Clerk...
The Bolocam Galactic Plane Survey -- II. Catalog of the Image Data (2009)
Rosolowsky, Erik, Dunham, Miranda K., Ginsburg, Adam, Bradley, Eric Todd, Aguirre, James, Bally, John, ...
We present a catalog of 8358 sources extracted from images produced by the Bolocam Galactic Plane Survey (BGPS). The BGPS is a survey of the millimeter dust continuum emission from the northern...
Massive Protoplanetary Disks in Orion Beyond the Trapezium Cluster (2009)
Mann, Rita K., Williams, Jonathan P.
We present Submillimeter Array observations of the 880 micron continuum emission from three circumstellar disks around young stars in Orion that lie several arcminutes (> 1-pc) north of the Trapezium...
Diverse protostellar evolutionary states in the young cluster AFGL961 (2009)
Williams, Jonathan P., Mann, Rita K., Beaumont, Christopher N., Swift, Jonathan J., Adams, Joseph D., Hora, Joe, ...
We present arcsecond resolution mid-infrared and millimeter observations of the center of the young stellar cluster AFGL961 in the Rosette molecular cloud. Within 0.2 pc of each other, we find an...
A Spatially Resolved Inner Hole in the Disk around GM Aurigae (2009)
Hughes, A. Meredith, Andrews, Sean M., Espaillat, Catherine, Wilner, David J., Calvet, Nuria, D'Alessio, Paola, ...
We present 0.3 arcsec resolution observations of the disk around GM Aurigae with the Submillimeter Array (SMA) at a wavelength of 860 um and with the Plateau de Bure Interferometer at a wavelength of...
The Circumstellar Disk Mass Distribution in the Orion Trapezium Cluster (2009)
Mann, Rita K., Williams, Jonathan P.
We present the results of a submillimeter interferometric survey of circumstellar disks in the Trapezium Cluster of Orion. We observed the 880 micron continuum emission from 55 disks using the...
Gaidos, Eric, Krot, Alexander N., Williams, Jonathan P., Raymond, Sean N.
In agreement with previous work, we show that the presence of the short-lived radionuclide Al-26 in the early Solar System was unlikely (
Cieza, Lucas A., Swift, Jonathan J., Mathews, Geoffrey S., Williams, Jonathan P.
We report deep Sub-Millimeter Array observations of 26 pre-main-sequence (PMS) stars with evolved inner disks. These observations measure the mass of the outer disk (r ~20-100 AU) across every stage...
Telescopes versus Microscopes: the puzzle of Iron-60 (2008)
The discovery that the short-lived radionucleide iron-60 was present in the oldest meteorites suggests that the formation of the Earth closely followed the death of a massive star. I discuss three...
Submillimeter Observations of the Young Low-Mass Object IRAS 04158+2805 (2008)
Andrews, Sean M., Liu, Michael C., Williams, Jonathan P., Allers, K. N.
We present high spatial resolution Submillimeter Array observations and supplementary single-dish photometry of the molecular gas and dust around IRAS 04158+2805, a young source with spectral type...
On the Evolution of the Dense Core Mass Function (2008)
Swift, Jonathan J., Williams, Jonathan P.
The mass distributions of dense cores in star-forming regions are measured to have a shape similar to the initial mass function of stars. This has been generally interpreted to mean that the...
Allen, Thomas S., Pipher, Judith L., Gutermuth, Robert A., Megeath, S. Thomas, Adams, Joseph D., Herter, Terry L., ...
We present {\it Spitzer} images of the relatively sparse, low luminosity young cluster L988e, as well as complementary near-infrared (NIR) and submillimeter images of the region. The cluster is...
GOODS 850-5 -- A z>4 Galaxy Discovered in the Submillimeter? (2007)
Wang, Wei-Hao, Cowie, Lennox L., Van Saders, Jennifer, Barger, Amy J., Williams, Jonathan P.
We report an SMA interferometric identification of a bright submillimeter source, GOODS 850-5. This source is one of the brightest 850 um sources in the GOODS-N but is extremely faint at all other...
A Submillimeter View of Circumstellar Dust Disks in $\rho$ Ophiuchus (2007)
Andrews, Sean M., Williams, Jonathan P.
We present new multiwavelength submillimeter continuum measurements of the circumstellar dust around 48 young stars in the $\rho$ Ophiuchus dark clouds. Supplemented with previous 1.3 mm observations...
On the likelihood of supernova enrichment of protoplanetary disks (2007)
Williams, Jonathan P., Gaidos, Eric
We estimate the likelihood of direct injection of supernova ejecta into protoplanetary disks using a model in which the number of stars with disks decreases linearly with time, and clusters expand...
Hot corinos in NGC1333-IRAS4B and IRAS2A (2006)
Bottinelli, Sandrine, Ceccarelli, Cecilia, Williams, Jonathan P., Lefloch, Bertrand
(Abridged) We aim to enlarge the number of known hot corinos and carry out a first comparative study with hot cores. The ultimate goal is to understand whether complex organic molecules form in the...
Molecular CO outflows in the L1641-N cluster: kneading a cloud core (2006)
Stanke, Thomas, Williams, Jonathan P.
We present results of 1.3mm interferometric and single-dish observations of the center of the L1641-N cluster in Orion. Single-dish wide-field continuum and CO(2-1) observations reveal the presence...
High Resolution Submillimeter Constraints on Circumstellar Disk Structure (2006)
Andrews, Sean M., Williams, Jonathan P.
We present a high spatial resolution submillimeter continuum survey of 24 circumstellar disks in the Tau-Aur and Oph-Sco star formation regions using the SMA. In the context of a simple model, we use...
The Dust Properties of Eight Debris Disk Candidates as Determined by Submillimeter Photometry (2006)
Williams, Jonathan P., Andrews, Sean M.
The nature of far-infrared dust emission toward main sequence stars, whether interstellar or circumstellar, can be deduced from submillimeter photometry. We present JCMT/SCUBA flux measurements at...
Williams, Jonathan P., Smith, Daniel C., Green, Brian N., Marsden, Brian D., Jennings, Keith R., Roberts, Lynne M., ...
Cholera toxin (CTx) is an AB5 cytotonic protein that has medical relevance in cholera and as a novel mucosal adjuvant. Here, we report an analysis of the noncovalent homopentameric complex of CTx B...
Submillimeter studies of circumstellar disks in Taurus and Orion (2005)
Williams, Jonathan P., Andrews, Sean M.
We highlight two recent studies of circumstellar disks in the Taurus and Orion star forming regions. Using the JCMT and CSO, we measure disk fluxes in Taurus over a wide range of submillimeter...
An 850 micron survey for dust around solar mass stars (2005)
Najita, Joan, Williams, Jonathan P.
We present the results of an 850 micron JCMT/SCUBA survey for dust around 13 nearby solar mass stars. The dust mass sensitivity ranged from 0.005 to 0.16 Earth masses. Three sources were detected in...
The Masses of the Orion Proplyds from Submillimeter Dust Emission (2005)
Williams, Jonathan P., Andrews, Sean M., Wilner, David J.
We have imaged the 880 micron continuum emission from the "proplyds" in the center of the Trapezium Cluster in Orion using the Submillimeter Array with a beam size 1.5'' FWHM and an rms of 2.7 mJy....
Circumstellar Dust Disks in Taurus-Auriga: The Submillimeter Perspective (2005)
Andrews, Sean M., Williams, Jonathan P.
We present a sensitive, multiwavelength submillimeter continuum survey of 153 young stellar objects in the Taurus-Auriga star formation region. The submillimeter detection rate is 61% to a...
COMPLEX ORGANIC MOLECULES IN HOT CORINOS AND HOT CORES (2005)
Bottinelli, Sandrine, Ceccarelli, Cecilia, Williams, Jonathan P., Neri, Roberto
Author Institution: Laboratoire d'Astrophysique de l'Observatoire de Grenoble,; BP 53, 38041 Grenoble Cedex 9, France, and; Institute for Astronomy, University of Hawai`i,; 2680 Woodlawn Drive,...
Submillimeter Array Observations of Disks in the SR 24 Multiple Star System (2004)
Andrews, Sean M., Williams, Jonathan P.
We present high-resolution aperture synthesis images from the Submillimeter Array of the 225 GHz (1.3 mm) continuum and CO J=2-1 line emission from the disks around components of the hierarchical...
Bottinelli, Sandrine, Ceccarelli, Cecilia, Neri, Roberto, Williams, Jonathan P., Caux, Emmanuel, Cazaux, Stephanie, ...
Complex organic molecules have previously been discovered in solar type protostars, raising the questions of where and how they form in the envelope. Possible formation mechanisms include grain...
Complex molecules in the hot core of the low mass protostar NGC1333-IRAS4A (2004)
Bottinelli, Sandrine, Ceccarelli, Cecilia, Lefloch, Bertrand, Williams, Jonathan P., Castets, Alain, Caux, Emmanuel, ...
We report the detection of complex molecules (HCOOCH_3, HCOOH and CH_3CN), signposts of a "hot core" like region, toward the low mass, Class 0 source NGC1333-IRAS4A. This is the second low mass...
Bottinelli, Sandrine, Williams, Jonathan P.
Evidence for a large scale flow of low density gas onto the Cepheus A young stellar cluster is presented. Observations of K-band near-infrared and multi-transition CS and N2H+ millimeter line...
Liu, Michael C., Matthews, Brenda C., Williams, Jonathan P., Kalas, Paul G.
(Abridged) We present results from a JCMT/SCUBA 850 um search for cold dust around nearby young stars belonging to the beta Pic (t~12 Myr) and the Local Association (t~50 Myr) moving groups. Unlike...
Detection of cool dust around the G2V star HD 107146 (2003)
Williams, Jonathan P., Najita, Joan, Liu, Michael C., Bottinelli, Sandrine, Carpenter, John M., Hillenbrand, Lynne A., ...
We report the detection of dust emission at sub-millimeter wavelengths from HD 107146, a G2V star with an age estimated to lie between 80 and 200 Myr. The emission is resolved at 450um with a size...
High resolution imaging of CO outflows in OMC-2 and OMC-3 (2003)
Williams, Jonathan P., Plambeck, R. L., Heyer, Mark H.
A large scale, high resolution map of CO(1-0) emission toward the OMC-2 and OMC-3 star forming regions is presented. The map is a mosaic of 46 fields using the Berkeley-Illinois-Maryland Array (BIMA)...
Mid-Infrared Imaging of the Protostellar Binary L1448N--IRS3(A,B) (2002)
Ciardi, David R., Williams, Jonathan P., Telesco, Charles M., Fisher, R. Scott, Packham, Chris, Pina, Robert, ...
Mid-infrared (10-25 \micron) imaging of the protostellar binary system L1448N-IRS3(A,B) is presented. Only one source, IRS3(A), was detected at mid-infrared wavelengths -- all of the mid-infrared...
Gas flows around 2 young stellar clusters in NGC2264 (2001)
Williams, Jonathan P., Garland, Catherine A.
Observations of the dust and gas toward two young stellar clusters, IRS1 and IRS2, in the NGC2264 star forming region are presented. Continuum emission is used to locate the dusty envelopes around...
Evidence for Pressure Driven Flows and Turbulent Dissipation in the Serpens NW Protocluster (2000)
Williams, Jonathan P., Myers, Philip C.
We have mapped the dense gas distribution and dynamics in the NW region of the Serpens molecular cloud in the CS(2-1) and N2H+(1-0) lines and 3 mm continuum using the FCRAO telescope and BIMA...
A Contracting, Turbulent, Starless Core in the Serpens Cluster (1999)
Williams, Jonathan P., Myers, Philip C.
We present combined single-dish and interferometric CS(2--1) and N2H+(1--0) observations of a compact core in the NW region of the Serpens molecular cloud. The core is starless according to...
The Spectral Correlation Function -- A New Tool for Analyzing Spectral-Line Maps (1999)
Rosolowsky, Erik W., Goodman, Alyssa A., Wilner, David J., Williams, Jonathan P.
The "spectral correlation function" analysis we introduce in this paper is a new tool for analyzing spectral-line data cubes. Our initial tests, carried out on a suite of observed and simulated data...
Molecular Clouds (a review) (1999)
Blitz, Leo, Williams, Jonathan P.
We review the progress made in understanding molecular cloud formation and evolution toward star formation since the first Crete conference in 1990. It now seems clear that molecular clouds in the...
The Structure and Evolution of Molecular Clouds: from Clumps to Cores to the IMF (1999)
Williams, Jonathan P., Blitz, Leo, McKee, Christopher F.
We review the progress that has been made in observing and analyzing molecular cloud structure in recent years. Structures are self-similar over a wide range of scales with similar power law indices...
A High Resolution Study of the Slowly Contracting, Starless Core L1544 (1999)
Williams, Jonathan P., Myers, Philip C., Wilner, David J., Di Francesco, James
We present interferometric observations of N2H+(1--0) in the starless, dense core L1544 in Taurus. Red-shifted self-absorption, indicative of inward motions, is found toward the center of an...
The Ionization Fraction in Dense Molecular Gas II: Massive Cores (1998)
Bergin, Edwin A., Plume, Rene, Williams, Jonathan P., Myers, Philip C.
We present an observational and theoretical study of the ionization fraction in several massive cores located in regions that are currently forming stellar clusters. Maps of the emission from the J =...
The Retinoblastoma Protein Is Required for Ras-Induced Oncogenic Transformationâ€
Williams, Jonathan P., Stewart, Timothy, Li, Bihua, Mulloy, Roseann, Dimova, Dessislava, Classon, Marie
Most human cancers involve either mutational activation of the Ras oncogenic pathway and/or inactivation of the retinoblastoma tumor suppressor (RB) pathway. Paradoxically, tumors that harbor Ras...
The Retinoblastoma Protein Is Required for Ras-Induced Oncogenic Transformationâ€
Williams, Jonathan P., Stewart, Timothy, Li, Bihua, Mulloy, Roseann, Dimova, Dessislava, Classon, Marie
Most human cancers involve either mutational activation of the Ras oncogenic pathway and/or inactivation of the retinoblastoma tumor suppressor (RB) pathway. Paradoxically, tumors that harbor Ras...
Williams, Jonathan P., Smith, Daniel C., Green, Brian N., Marsden, Brian D., Jennings, Keith R., Roberts, Lynne M., ...
Cholera toxin (CTx) is an AB5 cytotonic protein that has medical relevance in cholera and as a novel mucosal adjuvant. Here, we report an analysis of the noncovalent homopentameric complex of CTx B...