The Spitzer c2d Survey of Nearby Dense Cores VII: Chemistry and Dynamics in L43 (2009)
Chen, Jo-Hsin, Evans II, Neal J., Lee, Jeong-Eun, Bourke, Tyler L.
We present results from the Spitzer Space Telescope and molecular line observations of 9 species toward the dark cloud L43. The Spitzer images and molecular line maps suggest it has a starless core...
Jorgensen, Jes K., Van Dishoeck, Ewine F., Visser, Ruud, Bourke, Tyler L., Wilner, David J., Lommen, Dave, ...
The key question about early protostellar evolution is how matter is accreted from the large-scale molecular cloud, through the circumstellar disk onto the central star. A sample of 20 Class 0 and I...
The Spitzer c2d Survey of Nearby Dense Cores: VI. The Protostars of Lynds Dark Nebula 1221 (2009)
Young, Chadwick H., Bourke, Tyler L., Dunham, Michael M., Evans II, Neal J., Jorgensen, Jes K., Shirley, Yancy L., ...
Observations of Lynds Dark Nebula 1221 from the Spitzer Space Telescope are presented. These data show three candidate protostars towards L1221, only two of which were previously known. The infrared...
Multidimensional chemical modelling, II. Irradiated outflow walls (2009)
Bruderer, Simon, Benz, Arnold O., Doty, Steven D., Van Dishoeck, Ewine F., Bourke, Tyler L.
Observations of the high-mass star forming region AFGL 2591 reveal a large abundance of CO+, a molecule known to be enhanced by far UV (FUV) and X-ray irradiation. In chemical models assuming a...
Lee, Chin-Fei, Hirano, Naomi, Palau, Aina, Ho, Paul T. P., Bourke, Tyler L., Zhang, Qizhou, ...
HH 211 is a nearby young protostellar system with a highly collimated jet. We have mapped it in 352 GHz continuum, SiO (J=8-7), and HCO+ (J=4-3) emission at up to ~ 0.2" resolution with the...
Kirk, Jason M., Ward-Thompson, Derek, Di Francesco, James, Bourke, Tyler L., Evans II, Neal J., Merín, Bruno, ...
We present Spitzer IRAC (~2 deg^2) and MIPS (~8 deg^2) observations of the Cepheus Flare which is associated with the Gould Belt, at an approximate distance of ~300 pc. Around 6500 sources are...
Lommen, D., Maddison, S. T., Wright, Chris M., Van Dishoeck, Ewine F., Wilner, David J., Bourke, Tyler L.
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 models that explain...
Lommen, D., Maddison, S. T., Wright, Chris M., Van Dishoeck, Ewine F., Wilner, David J., Bourke, Tyler L.
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 models that explain...
Lee, Chang Won, Bourke, Tyler L., Myers, Philip C., Dunham, Mike, Evans, Neal, Lee, Youngung, ...
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 near-infrared to...
Spitzer Observations of L429: A Near-collapse or Collapsing Starless Core (2008)
Stutz, Amelia M., Bourke, Tyler L., Rieke, George H., Bieging, John H., Misselt, Karl A., Myers, Philip C., ...
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 35 mag near the center....
Chen, Xuepeng, Bourke, Tyler L., Launhardt, Ralf, Henning, Thomas
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 Submillimeter Array. The...
The Embedded Massive Star Forming Region RCW 38 (2008)
Wolk, Scott J., Bourke, Tyler L., Vigil, Miquela
RCW~38 is a uniquely young ($
Dunham, Michael M., Crapsi, Antonio, Evans II, Neal J., Bourke, Tyler L., Huard, Tracy L., Myers, Philip C., ...
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 Telescope c2d...
Harvey, Paul M., Huard, Tracy L., Jørgensen, Jes K., Gutermuth, Robert A., Mamajek, Eric E., Bourke, Tyler L., ...
We present observations of two areas totalling 0.57 deg^2 in the IC 5146 star-forming region at 3.6, 4.5, 5.8, 8.0, 24, and 70 μm observed with the Spitzer Space Telescope. We reexamine the issue of...
A new look at stellar outflows : Spitzer Observations of the HH 46/47 system (2008)
Noriega-Crespo, Alberto, Morris, Patrick, Marleau, Francine R., Carey, Sean, Boogert, Adwin, Van Dishoeck, Ewine, ...
We present the Early Release Observations of the HH 46/47 system and HH 46 IRS 1 source, taken with the three instruments aboard the Spitzer Space Telescope. The optically invisible southwest lobe,...
MAMBO Mapping of Spitzer c2d Small Clouds and Cores (2008)
Kauffmann, Jens, Bertoldi, Frank, Bourke, Tyler L., Evans II, Neal J., Lee, Chang Won
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, and to explore the...
ATCA and Spitzer Observations of the Binary Protostellar Systems CG30 and BHR71 (2008)
Chen, Xuepeng, Launhardt, Ralf, Bourke, Tyler L., Henning, Thomas, Barnes, Peter J.
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 continuum, using the...
Chen, Xuepeng, Bourke, Tyler L., Launhardt, Ralf, Henning, Thomas
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 CG 30, using the Submillimeter Array....
ATCA and Spitzer observations of the binary protostellar systems CG 30 and BHR 71 (2008)
Chen, Xuepeng, Launhardt, Ralf, Bourke, Tyler L., Henning, Thomas, Barnes, Peter J.
We present interferometric observations of the isolated, low-mass protostellar double cores CG 30 and BHR 71 in the N2H+ (1-0) line and at 3 mm dust continuum, using the Australian Telescope Compact...
Wolk, Scott J., Spitzbart, Bradley D., Bourke, Tyler L., Gutermuth, Robert A., Vigil, Miquela, Comerón, Fernando
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 centered on the...
The CO Molecular Outflows of IRAS 16293-2422 Probed by the Submillimeter Array (2007)
Yeh, Sherry C. C., Hirano, Naomi, Bourke, Tyler L., Ho, Paul T. P., Lee, Chin-Fei, Ohashi, Nagayoshi, ...
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 scale (~3000 AU)...
The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. IV. Lupus Observed with MIPS (2007)
Chapman, Nicholas L., Lai, Shih-Ping, Mundy, Lee G., Brooke, Timothy Y., Cieza, Lucas A., ...
We present maps of 7.78 deg^2 of the Lupus molecular cloud complex at 24, 70, and 160 μm. They were made with the Spitzer Space Telescope Multiband Imaging Photometer for Spitzer (MIPS) instrument...
Molecular Line Observations of the Small Protostellar Group L1251B (2007)
Lee, Jeong-Eun, Di Francesco, James, Bourke, Tyler L., Evans II, Neal J., Wu, Jingwen
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 complementary to...
Submillimeter arcsecond-resolution mapping of the highly collimated protostellar jet HH 211 (2007)
Lee, Chin-Fei, Ho, Paul T. P., Palau, Aina, Hirano, Naomi, Bourke, Tyler L., Shang, Hsien, ...
We have mapped the protostellar jet HH 211 in 342 GHz continuum, SiO ($J=8-7$), and CO ($J=3-2$) emission at $\sim$ \arcs{1} resolution with the Submillimeter Array (SMA). Thermal dust emission is...
The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. IV. Lupus Observed with MIPS (2007)
Chapman, Nicholas L., Lai, Shih-Ping, Mundy, Lee G., Evans II, Neal J., Brooke, Timothy Y., Cieza, Lucas A., ...
We present maps of 7.78 square degrees of the Lupus molecular cloud complex at 24, 70, and $160\:\mu$m. They were made with the Spitzer Space Telescope's Multiband Imaging Photometer for Spitzer...
The Spitzer c2d Survey of Nearby Dense Cores. IV. Revealing the Embedded Cluster in B59 (2007)
Brooke, Timothy Y., Huard, Tracy L., Bourke, Tyler L., Boogert , A. C. Adwin, Allen, Lori E., Blake, Geoffrey A., ...
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 μm indicates at least 20...
HH 212: SMA Observations of a Remarkable Protostellar Jet (2007)
Lee, Chin-Fei, Ho, Paul T. P., Beuther, Henrik, Bourke, Tyler L., Hirano, Naomi, Shang, Hsien, ...
HH 212 is a nearby (460 pc) protostellar jet discovered in H$_2$ powered by a Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. It is highly collimated and symmetric with matched pairs of...
Jorgensen, Jes K., Bourke, Tyler L., Myers, Philip C., Di Francesco, James, Van Dishoeck, Ewine F., Lee, Chin-Fei, ...
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 excitation lines of...
Investigating grain growth in disks around southern T Tauri stars at millimetre wavelengths (2007)
Lommen, Dave, Wright, Chris M., Maddison, Sarah T., Jørgensen, J. K., Bourke, Tyler L., Van Dishoeck, Ewine F., ...
Abstract not available.
HH 212: Submillimeter Array observations of a remarkable protostellar jet (2007)
Lee, Chin-Fei, Ho, Paul T. P., Hirano, Naomi, Beuther, Henrik, Bourke, Tyler L., Shang, Hsien, ...
HH 212 is a nearby (460 pc) protostellar jet discovered in H2 powered by a Class 0 source, IRAS 05413-0104. We have mapped it in 850 mum continuum, SiO(J=8-7), CO(J=3-2), SO(NJ=89-78), HCO+(J=4-3),...
Investigating grain growth in disks around southern T Tauri stars at millimetre wavelengths (2007)
Lommen, Dave, Wright, Chris M., Maddison, Sarah T., Jorgensen, J. K., Bourke, Tyler L., Van Dishoeck, Ewine F., ...
Abstract not available.
Investigating grain growth in disks around southern T Tauri stars at millimetre wavelengths (2007)
Lommen, Dave, Wright, Chris M., Maddison, Sarah T., Jørgensen, J. K., Bourke, Tyler L., Van Dishoeck, Ewine F., ...
Abstract not available.
Investigating grain growth in disks around southern T Tauri stars at millimetre wavelengths (2007)
Lommen, Dave, Wright, Chris M., Maddison, Sarah T., Jørgensen, J. K., Bourke, Tyler L., Van Dishoeck, Ewine F., ...
Abstract not available.
Investigating grain growth in disks around southern T Tauri stars at millimetre wavelengths (2007)
Lommen, Dave, Wright, Chris M., Maddison, Sarah T., Jorgensen, J. K., Bourke, Tyler L., Van Dishoeck, Ewine F., ...
Abstract not available.
SHARC-II Mapping of Spitzer c2d Small Clouds and Cores (2006)
Wu, Jingwen, Dunham, Michael M., Evans II, Neal J., Bourke, Tyler L., Young, Chadwick H.
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 to the Spitzer...
Porras, Alicia, Jørgensen, Jes K., Allen, Lori E., Evans II, Neal J., Bourke, Tyler L., Alcal{á}, Juan M., ...
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 $A_V >2$. Analysis of the data in the 2005...
The Spitzer c2d Survey of Nearby Dense Cores: IV. Revealing the Embedded Cluster in B59 (2006)
Brooke, Timothy Y., Huard, Tracy L., Bourke, Tyler L., Boogert, A. C. Adwin, Allen, Lori E., Blake, Geoffrey A., ...
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 indicates at least 20...
Investigating grain growth in disks around southern T Tauri stars at millimetre wavelengths (2006)
Lommen, Dave, Wright, Chris M., Maddison, Sarah T., Jorgensen, Jes K., Bourke, Tyler L., Van Dishoeck, Ewine F., ...
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 models that explain...
A Large Scale Survey of NGC1333 (2006)
Walsh, Andrew J., Myers, Philip C., Di Francesco, James, Mohanty, Subhanjoy, Bourke, Tyler L., Gutermuth, Robert, ...
We observed the clustered star forming complex NGC1333 with the BIMA and FCRAO telescopes in the transitions HCO+(1-0) and N2H+(1-0) over an 11'x11' area with resolution ~10" (0.015pc). The N2H+...
Bourke, Tyler L., Myers, Philip C., Dunham, Michael M., Kauffmann, Jens, Shirley, Yancy L., ...
We present Spitzer Space Telescope observations of the "evolved starless core" L1521F that reveal the presence of a very low luminosity object (L < 0.07 L(.)). The object, L1521F-IRS, is directly...
Lee, Jeong-Eun, Di Francesco, James, Lai, Shih-Ping, Bourke, Tyler L., Spiesman, Bill, ...
We present a comprehensive study of a low-mass star-forming region, L1251B, at wavelengths from the near-infrared to the millimeter. L1251B, in which only one protostar, IRAS 22376+7455, was known...
Bourke, Tyler L., Myers, Philip C., Evans II, Neal J., Dunham, Michael M., Kauffmann, Jens, Shirley, Yancy L., ...
We present Spitzer Space Telescope observations of the "evolved starless core" L1521F which reveal the presence of a very low luminosity object (L < 0.07 Lsun). The object, L1521F-IRS, is directly...
The Spitzer c2d survey of large, nearby, interstellar clouds. III. Perseus observed with IRAC (2006)
Jørgensen, Jes K., Harvey, Paul M., Huard, Tracy L., Allen, Lori E., Porras, Alicia, ...
We present observations of 3.86 deg to the 2nd of the Perseus molecular cloud complex with the Spitzer Space Telescope Infrared Array Camera (IRAC). The maps show strong extended emission arising...
Lee, Jeong-Eun, Di Francesco, James, Lai, Shih-Ping, Bourke, Tyler L., Evans II, Neal J., Spiesman, Bill, ...
We present a comprehensive study of a low-mass star-forming region,L1251B, at wavelengths from the near-infrared to the millimeter. L1251B, where only one protostar, IRAS 22376+7455, was known...
Wolk, Scott J., Spitzbart, Bradley D., Bourke, Tyler L., Alves, Joao
We report on results of a 96.7 ks Chandra observation of one of the youngest, most embedded and massive young stellar clusters studied in X-rays - RCW 38. We detect 460 sources in the field of which...
The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. III. Perseus Observed with IRAC (2006)
Jorgensen, Jes K., Harvey, Paul M., Evans II, Neal J., Huard, Tracy L., Allen, Lori E., Porras, Alicia, ...
We present observations of 3.86 sq. deg. of the Perseus molecular cloud complex with the Spitzer Space Telescope Infrared Array Camera (IRAC). The maps show strong extended emission arising from...
Infall and outflow around the HH 212 protostellar system (2006)
Lee, Chin-Fei, Ho, Paul T. P., Beuther, Henrik, Bourke, Tyler L., Zhang, Qizhou, Hirano, Naomi, ...
HH 212 is a highly collimated jet discovered in H2 powered by a young Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. We have mapped around it in 1.33 mm continuum, 12CO (J=2-1), 13CO...
Dunham, Michael M., Evans, Neal J., Bourke, Tyler L., Dullemond, Cornelis P., Young, Chadwick H., Brooke, Timothy Y., ...
We report the first detections of the Class 0 protostellar source IRAM 04191+1522 at wavelengths shortward of 60 mum with the Spitzer Space Telescope. We see extended emission in the Spitzer images...
Infall and Outflow around the HH 212 protostellar system (2005)
Lee, Chin-Fei, Ho, Paul T. P., Beuther, Henrik, Bourke, Tyler L., Zhang, Qizhou, Hirano, Naomi, ...
HH 212 is a highly collimated jet discovered in H2 powered by a young Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. We have mapped around it in 1.33 mm continuum, 12CO ($J=2-1$), 13CO...
Observations of Global and Local Infall in NGC 1333 (2005)
Walsh, Andrew J., Bourke, Tyler L., Myers, Philip C.
We report ``infall asymmetry'' in the HCO$^+$ (1--0) and (3--2) lines toward NGC 1333, extended over $\sim 0.39 {\rm pc}^2$, a larger extent than has been reported be fore, for any star-forming...
Discovery of a Low Mass Bipolar Molecular Outflow from L1014-IRS with the Submillimeter Array (2005)
Bourke, Tyler L., Crapsi, Antonio, Myers, Philip C., Evans II, Neal J., Wilner, David J., Huard, Tracy L., ...
Using the Submillimeter Array we report the discovery of a compact low mass bipolar molecular outflow from L1014-IRS and confirm its association with the L1014 dense core at 200 pc. Consequently,...
Bourke, Tyler L., Hyland, A. R., Robinson, Garry
We present the results of a survey of a small sample (14) of low-mass protostars (L_IR < 10^3 Lsun) for 6.7 GHz methanol maser emission performed using the ATNF Parkes radio telescope. No new masers...
Submillimeter Array Observations of L1551 IRS 5 in CS (J=7-6) (2004)
Takakuwa, Shigehisa, Ohashi, Nagayoshi, Ho, Paul T. P., Qi, Chunhua, Wilner, David J., Zhang, Qizhou, ...
We have imaged the circumstellar envelope around the binary protostar L1551 IRS 5 in CS (J=7-6) and 343 GHz continuum emission at ~ 3 arcsec resolution using the Submillimeter Array. The continuum...
Magnetic Fields in Molecular Clouds (2004)
Bourke, Tyler L., Goodman, Alyssa A.
Magnetic fields are believed to play an important role in the evolution of molecular clouds, from their large scale structure to dense cores, protostellar envelopes, and protoplanetary disks. How...
Young, Chadwick H., Jørgensen, Jes K., Shirley, Yancy L., Kauffmann, Jens, Huard, Tracy, Lai, Shih-Ping, ...
The Spectacular BHR 71 Outflow (2001)
BHR 71 is a well isolated Bok globule located at ~200 pc, which harbours a highly collimated bipolar outflow. The outflow is driven by a very young Class 0 protostar with a luminosity of ~9 L_sun. It...
IRAS 11590-6452 in BHR 71 - a binary protostellar system? (2001)
New AAT near-infrared and SEST 12CO J=2-1 observations are combined with existing ISO mid-infrared and ATCA cm radio continuum observations to examine the protostellar content of the Bok globule BHR...
New OH Zeeman measurements of magnetic field strengths in molecular clouds (2001)
Bourke, Tyler L., Myers, Philip C., Robinson, Garry, Hyland, A. R.
We present the results of a new survey of 23 molecular clouds for the Zeeman effect in OH undertaken with the ATNF Parkes 64-m radio telescope and the NRAO Green Bank 43-m radio telescope. The Zeeman...