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Large grains in disks around young stars: ATCA observations of WW Cha, RU Lup, and CS Cha
Dave Lommen, Sarah Maddison, Chris Wright +3
Grains in disks around young stars grow from interstellar submicron sizes to planetesimals over the course of several Myr. Thermal emission of large grains or pebbles can be best o…
The Spitzer c2d Survey of Nearby Dense Cores. V. Discovery of a VeLLO in the "Starless" Dense Core L328
Chang Won Lee, Tyler L. Bourke, Philip C. Myers +8
This paper reports the discovery of a Very Low Luminosity Object (VeLLO) in the "starless" dense core L328, using the Spitzer Space Telescope and ground based observations from nea…
Spitzer Observations of L429: A Near-collapse or Collapsing Starless Core
Amelia M. Stutz, Tyler L. Bourke, George H. Rieke +4
We present Spitzer infrared observations of the starless core L429. The IR images of this core show an absorption feature, caused by the dense core material, at wavelengths <= 70 m…
SMA CO(2-1) Observations of CG30: A Protostellar Binary System with a High-Velocity Quadrupolar Molecular Outflow
Xuepeng Chen, Tyler L. Bourke, Ralf Launhardt +1
We present interferometric observations in the 12CO (2-1) line and at 1.3 mm dust continuum of the low-mass protostellar binary system in the cometary globule CG30, using the Submi…
The Embedded Massive Star Forming Region RCW 38
Scott J. Wolk, Tyler L. Bourke, Miquela Vigil
RCW~38 is a uniquely young (1 Myr), embedded () stellar cluster surrounding a pair of early O stars (O5.5) and is one of the few regions within 2 kpc other th…
The Ara OB 1a Association
Scott J. Wolk, Fernando Comeron, Tyler Bourke
The Ara OB1a association is one of the closest sites where triggered star formation is visible for multiple generations of massive stars. At about 1.3 kpc distance, it contains com…
Identifying the Low Luminosity Population of Embedded Protostars in the c2d Observations of Clouds and Cores
Michael M. Dunham, Antonio Crapsi, Neal J. Evans +4
We present a search for all embedded protostars with internal luminosities < 1 solar luminosity in the sample of nearby, low-mass star-forming regions surveyed by the Spitzer Space…
MAMBO Mapping of Spitzer c2d Small Clouds and Cores
Jens Kauffmann, Frank Bertoldi, Tyler L. Bourke +2
AIMS: To study the structure of nearby (< 500 pc) dense starless and star-forming cores with the particular goal to identify and understand evolutionary trends in core properties,…
ATCA and Spitzer Observations of the Binary Protostellar Systems CG30 and BHR71
Xuepeng Chen, Ralf Launhardt, Tyler L. Bourke +2
We present interferometric observations with resolution of ~3 arcsecs of the isolated, low-mass protostellar double cores CG30 and BHR71 in the N2$H+(1-0) line and at 3mm dust cont…
X-ray and IR Point Source Identification and Characteristics in the Embedded, Massive Star-Forming Region RCW 108
Scott J. Wolk, Bradley D. Spitzbart, Tyler L. Bourke +3
We report on the results of an approximately 90 ks Chandra observation of a complex region that hosts multiple sites of recent and active star formation in ARA OB1a. The field is c…
Highly deuterated pre-stellar cores in a high-mass star formation region
F. Fontani, P. Caselli, T. L. Bourke +2
We have observed the deuterated gas in the high-mass star formation region IRAS 05345+3157 at high-angular resolution, in order to determine the morphology and the nature of such g…
The CO Molecular Outflows of IRAS 16293-2422 Probed by the Submillimeter Array
Sherry C. C. Yeh, Naomi Hirano, Tyler L. Bourke +4
We have mapped the proto-binary source IRAS 16293-2422 in CO 2-1, 13CO 2-1, and CO 3-2 with the Submillimeter Array (SMA). The maps with resolution of 1".5-5" reveal a single small…
Molecular Line Observations of the Small Protostellar Group L1251B
Jeong-Eun Lee, James Di Francesco, Tyler L. Bourke +2
We present molecular line observations of L1251B, a small group of pre- and protostellar objects, and its immediate environment in the dense C18O core L1251E. These data are comple…
Submillimeter arcsecond-resolution mapping of the highly collimated protostellar jet HH 211
Chin-Fei Lee, Paul T. P. Ho, Aina Palau +4
We have mapped the protostellar jet HH 211 in 342 GHz continuum, SiO (), and CO () emission at \arcs{1} resolution with the Submillimeter Array (SMA). Thermal…
The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. IV. Lupus Observed with MIPS
Nicholas L. Chapman, Shih-Ping Lai, Lee G. Mundy +22
We present maps of 7.78 square degrees of the Lupus molecular cloud complex at 24, 70, and m. They were made with the Spitzer Space Telescope's Multiband Imaging Photometer…
The Detection and Characterization of cm Radio Continuum Emission from the Low-mass Protostar L1014-IRS
Yancy L. Shirley, Mark J. Claussen, Tyler M. Bourke +2
Observations by the Cores to Disk Legacy Team with the Spitzer Space Telescope have identified a low luminosity, mid-infrared source within the dense core, Lynds 1014, which was pr…
Arcsecond-Resolution Submillimeter HCN Imaging of the Binary Protostar IRAS 16293-2422
S. Takakuwa, N. Ohashi, T. Bourke +6
(Abridged) With the SMA we have made high angular-resolution (~1" = 160 AU) observations of the protobinary system IRAS 16293-2422 in the J = 4-3 lines of HCN and HC^15N, and in th…
The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds: VI. Perseus Observed with MIPS
L. M. Rebull, K. R. Stapelfeldt, N. J. Evans +21
We present observations of 10.6 square degrees of the Perseus molecular cloud at 24, 70, and 160 microns with the Spitzer Space Telescope Multiband Imaging Photometer for Spitzer (…
HH 212: SMA Observations of a Remarkable Protostellar Jet
Chin-Fei Lee, Paul T. P. Ho, Henrik Beuther +4
HH 212 is a nearby (460 pc) protostellar jet discovered in H powered by a Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. It is highly collimated and symmetric wi…
PROSAC: A Submillimeter Array Survey of Low-Mass Protostars. I. Overview of Program: Envelopes, Disks, Outflows and Hot Cores
Jes K. Jorgensen, Tyler L. Bourke, Philip C. Myers +8
This paper presents a large spectral line and continuum survey of 8 deeply embedded, low-mass protostellar cores using the Submillimeter Array. Each source was observed in high exc…
SHARC-II Mapping of Spitzer c2d Small Clouds and Cores
Jingwen Wu, Michael M. Dunham, Neal J. Evans +2
We present the results of a submillimeter survey of 53 low-mass dense cores with the Submillimeter High Angular Resolution Camera II (SHARC-II). The survey is a follow-up project t…
The Spitzer c2d survey of Large, Nearby, Interstellar Clouds. V. Chamaeleon II Observed with IRAC
Alicia Porras, Jes K. Jørgensen, Lori E. Allen +19
We present IRAC (3.6, 4.5, 5.8, and 8.0 micron) observations of the Chamaeleon II molecular cloud. The observed area covers about 1 square degree defined by . Analysis of t…
The Spitzer c2d Survey of Nearby Dense Cores: IV. Revealing the Embedded Cluster in B59
Timothy Y. Brooke, Tracy L. Huard, Tyler L. Bourke +22
Infrared images of the dark cloud core B59 were obtained with the Spitzer Space Telescope as part of the "Cores to Disks" Legacy Science project. Photometry from 3.6-70 microns ind…
Investigating grain growth in disks around southern T Tauri stars at millimetre wavelengths
Dave Lommen, Chris M. Wright, Sarah T. Maddison +7
CONTEXT - Low-mass stars form with disks in which the coagulation of grains may eventually lead to the formation of planets. It is not known when and where grain growth occurs, as…