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Articles 1 - 8 of 8
Full-Text Articles in Physical Sciences and Mathematics
A Spitzer View Of The Giant Molecular Cloud Mon Ob1/Ngc 2264, Valerie A. Rapson, Judith L. Pipher, R. A. Gutermuth, Megeatj S. Thomas, Thomas S. Allen, Phillip C. Myers, Lori E. Allen
A Spitzer View Of The Giant Molecular Cloud Mon Ob1/Ngc 2264, Valerie A. Rapson, Judith L. Pipher, R. A. Gutermuth, Megeatj S. Thomas, Thomas S. Allen, Phillip C. Myers, Lori E. Allen
Robert A. Gutermuth
We present Spitzer 3.6, 4.5, 5.8, 8.0, and 24 μm images of the Mon OB1 East giant molecular cloud, which contains the young star forming region NGC 2264, as well as more extended star formation. With Spitzer data and Two Micron All Sky Survey photometry, we identify and classify young stellar objects (YSOs) with dusty circumstellar disks and/or envelopes in Mon OB1 East by their infrared-excess emission and study their distribution with respect to cloud material. We find a correlation between the local surface density of YSOs and column density of molecular gas as traced by dust extinction that is …
The Spitzer Survey Of Interstellar Clouds In The Gould Belt. Vi. The Auriga-California Molecular Cloud Observed With Irac And Mips, Hannah Broekhoven-Fiene, Brenda C. Matthews, Paul M. Harvey, R. A. Gutermuth, Tracy L. Huard, Nicholas F.H. Tothill, David Nutter, Tyler L. Bourke, James Difrancesco, Jes K. Jorgensen, Lori E. Allen, Nicholas L. Chapman, Michael M. Dunham, Bruno Merin, Jennifer Miller, Susan Terebey, Dawn E. Peterson, Karl R. Stapelfeldt
The Spitzer Survey Of Interstellar Clouds In The Gould Belt. Vi. The Auriga-California Molecular Cloud Observed With Irac And Mips, Hannah Broekhoven-Fiene, Brenda C. Matthews, Paul M. Harvey, R. A. Gutermuth, Tracy L. Huard, Nicholas F.H. Tothill, David Nutter, Tyler L. Bourke, James Difrancesco, Jes K. Jorgensen, Lori E. Allen, Nicholas L. Chapman, Michael M. Dunham, Bruno Merin, Jennifer Miller, Susan Terebey, Dawn E. Peterson, Karl R. Stapelfeldt
Robert A. Gutermuth
We present observations of the Auriga-California Molecular Cloud (AMC) at 3.6, 4.5, 5.8, 8.0, 24, 70, and 160 μm observed with the IRAC and MIPS detectors as part of the Spitzer Gould Belt Legacy Survey. The total mapped areas are 2.5 deg2 with IRAC and 10.47 deg2 with MIPS. This giant molecular cloud is one of two in the nearby Gould Belt of star-forming regions, the other being the Orion A Molecular Cloud (OMC). We compare source counts, colors, and magnitudes in our observed region to a subset of the SWIRE data that was processed through our pipeline. Using color-magnitude …
Co Abundance Variations In The Orion Molecular Cloud, F. Ripple, M.H. Heyer, R. A. Gutermuth, R.L. Snell, C.M. Brunt
Co Abundance Variations In The Orion Molecular Cloud, F. Ripple, M.H. Heyer, R. A. Gutermuth, R.L. Snell, C.M. Brunt
Robert A. Gutermuth
Infrared stellar photometry from the Two Micron All-Sky Survey (2MASS) and spectral line imaging observations of 12CO and 13CO J = 1–0 line emission from the Five College Radio Astronomy Observatory (FCRAO) 14-m telescope are analysed to assess the variation of the CO abundance with physical conditions throughout the Orion A and Orion B molecular clouds. Three distinct Av regimes are identified in which the ratio between the 13CO column density and visual extinction changes corresponding to the photon-dominated envelope, the strongly self-shielded interior, and the cold, dense volumes of the clouds. Within the strongly self-shielded interior of the Orion …
The Herschel M33 Extended Survey (Herm33es): Pacs Spectroscopy Of The Star Forming Region Bclmp 302, B. Mookerjea, C. Kramer, C. Buchbender, M. Boquien, S. Verley, M. Relaño, G. Quintana-Lacaci, S. Aalto, J. Braine, Daniela Calzetti, F. Combes, S. Garcia-Burillo, P. Gratier, C. Henkel, F. Israel, S. Lord, T. Nikola, M. Rölling, G. Stacey, F. S. Tabatabaei, F. Van Der Tak, P. Van Der Werf
The Herschel M33 Extended Survey (Herm33es): Pacs Spectroscopy Of The Star Forming Region Bclmp 302, B. Mookerjea, C. Kramer, C. Buchbender, M. Boquien, S. Verley, M. Relaño, G. Quintana-Lacaci, S. Aalto, J. Braine, Daniela Calzetti, F. Combes, S. Garcia-Burillo, P. Gratier, C. Henkel, F. Israel, S. Lord, T. Nikola, M. Rölling, G. Stacey, F. S. Tabatabaei, F. Van Der Tak, P. Van Der Werf
Daniela Calzetti
Context: The emission line of [CII] at 158 micron is one of the strongest cooling lines of the interstellar medium (ISM) in galaxies. Aims: Disentangling the relative contributions of the different ISM phases to [CII] emission, is a major topic of the HerM33es program, a Herschel key project to study the ISM in the nearby spiral galaxy M33. Methods: Using PACS, we have mapped the emission of [CII] 158 micron, [OI] 63 micron, and other FIR lines in a 2'x2' region of the northern spiral arm of M33, centered on the HII region BCLMP302. At the peak of H-alpha emission, …
Molecular Outflows From The Protocluster, Serpens South, Fumitaka Nakamura, Koji Sugitani, Yoshito Shimajiri, Takashi Tsukagoshi, Aya E. Higuchi, Shogo Nishiyama, Ryohei Kawabe, Michihiro Takami, Jennifer L. Karr, Robert A. Gutermuth, Grant Wilson
Molecular Outflows From The Protocluster, Serpens South, Fumitaka Nakamura, Koji Sugitani, Yoshito Shimajiri, Takashi Tsukagoshi, Aya E. Higuchi, Shogo Nishiyama, Ryohei Kawabe, Michihiro Takami, Jennifer L. Karr, Robert A. Gutermuth, Grant Wilson
Grant Wilson
We present the results of CO ($J=3-2$) and HCO$^+$ ($J=4-3$) mapping observations toward a nearby embedded cluster, Serpens South, using the ASTE 10 m telescope. Our CO ($J=3-2$) map reveals that many outflows are crowded in the dense cluster-forming clump that can be recognized as a HCO$^+$ clump with a size of $\sim$ 0.2 pc and mass of $\sim$ 80 M$_\odot$. The clump contains several subfragments with sizes of $\sim$ 0.05 pc. By comparing the CO ($J=3-2$) map with the 1.1 mm dust continuum image taken by AzTEC on ASTE, we find that the spatial extents of the outflow lobes …
The Five College Radio Astronomy Observatory Co Mapping Survey Of The Taurus Molecular Cloud, Gopal Narayanan, Mark H. Heyer, Christopher Brunt, Paul F. Goldsmith, Ronald Snell, Di Li
The Five College Radio Astronomy Observatory Co Mapping Survey Of The Taurus Molecular Cloud, Gopal Narayanan, Mark H. Heyer, Christopher Brunt, Paul F. Goldsmith, Ronald Snell, Di Li
Gopal Narayanan
The FCRAO Survey of the Taurus molecular cloud observed the 12CO and 13CO J = 1–0 emission from 98 deg2 of this important, nearby, star-forming region. This set of data with 45'' resolution comprises the highest spatial dynamic range image of an individual molecular cloud constructed to date and provides valuable insights to the molecular gas distribution, kinematics, and the star formation process. In this contribution, we describe the observations, calibration, data processing, and characteristics of the noise and line emission of the survey. The angular distribution of 12CO and 13CO emission over 1 km s−1 velocity intervals and the …
Complex C: A Low-Metallicity High-Velocity Cloud Plunging Into The Milky Way, Todd M. Tripp, Bart P. Wakker, Edward B. Jenkins, C. W. Bowers, A. C. Danks, R. F. Green, S. R. Heap, C. L. Joseph, M. E. Kaiser, J. L. Linsky, B. E. Woodgate
Complex C: A Low-Metallicity High-Velocity Cloud Plunging Into The Milky Way, Todd M. Tripp, Bart P. Wakker, Edward B. Jenkins, C. W. Bowers, A. C. Danks, R. F. Green, S. R. Heap, C. L. Joseph, M. E. Kaiser, J. L. Linsky, B. E. Woodgate
Todd M. Tripp
We present evidence that high-velocity cloud (HVC) complex C is a low-metallicity gas cloud that is plunging toward the disk and beginning to interact with the ambient gas that surrounds the Milky Way. This evidence begins with a new high-resolution (7 km s-1 FWHM) echelle spectrum of 3C 351 obtained with the Space Telescope Imaging Spectrograph (STIS). 3C 351 lies behind the low-latitude edge of complex C, and the new spectrum provides accurate measurements of O I, Si II, Al II, Fe II, and Si III absorption lines at the velocity of complex C; N I, S II, Si IV, …
Star Formation In Bright Rimmed Clouds. I. Millimeter And Submillimeter Molecular Line Surveys, Christopher H. De Vries, Gopal Narayanan, Ronald L. Snell
Star Formation In Bright Rimmed Clouds. I. Millimeter And Submillimeter Molecular Line Surveys, Christopher H. De Vries, Gopal Narayanan, Ronald L. Snell
Gopal Narayanan
We present the results of the first detailed millimeter and submillimeter molecular line survey of bright-rimmed clouds, observed at FCRAO in the CO (J = 1 ? 0), C18O (J = 1 ? 0), HCO+ (J = 1 ? 0), H13CO+ (J = 1 ? 0), and N2H+ (J = 1 ? 0) transitions, and at the Heinrich Hertz Telescope in the CO (J = 2 ? 1), HCO+ (J = 3 ? 2), HCO+ (J = 4 ? 3), H13CO+ (J = 3 ? 2), and H13CO+ (J = 4 ? 3) molecular line transitions. The source list is …