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Recombination Lines of Embedded Star Clusters
S. C. Beck
Aims. We are trying to probe conditions in the youngest super star clusters, those still embedded in dense obscuring clouds. Methods. The hydrogen recombination lines in the radio…
The Extraordinary Infrared Spectrum of NGC 1222 (Mkn 603)
Sara C. Beck, Jean L. Turner, Jenna Kloosterman
The infrared spectra of starburst galaxies are dominated by the low-excitation lines of [NeII] and [SIII], and the stellar populations deduced from these spectra appear to lack sta…
Brackett Lines from the Super Star Cluster Nebulae in He 2-10
Alaina L. Henry, Jean L. Turner, Sara C. Beck +3
We present high spectral resolution (v~12-16 km/s) Brackett line spectroscopy of the blue compact dwarf galaxy Henize 2-10 made with NIRSPEC on the Keck Telescope. The spatial reso…
Subarcsecond-Resolution Radio Maps of Nearby Spiral Galaxies
Chao-Wei Tsai, Jean L. Turner, Sara C. Beck +4
We report subarcsecond-resolution VLA imaging of four nearby spiral galaxies: IC 342, Maffei II, NGC 2903, and NGC 6946. In each galaxy, compact radio continuum sources are identif…
High Resolution Radio Maps of Four Nearby Spiral Galaxies
Chao-Wei Tsai, Jean L. Turner, Sara C. Beck +4
We report subarcsecond-resolution VLA imaging of the centers of four nearby spiral galaxies: IC 342, Maffei II, NGC 2903, and NGC 6946. In each galaxy, 7 - 12 compact radio continu…
MERLIN and VLA Observations of VII Zw 19: Distant Cousin of M82
Sara C. Beck, S. T. Garrington, Jean L. Turner +1
We have observed the starburst dwarf galaxy VII Zw 19 at subarcsecond resolution with the MERLIN and MERLIN+EVN networks at 18 cm, with MERLIN at 6 cm, and with the VLA in A array…
Probing the Early Stages of Low-Mass Star Formation in LDN 1689N: Dust and Water in IRAS 16293-2422A, B, and E
Ronald Stark, Goeran Sandell, Sara C. Beck +8
We present deep images of dust continuum emission at 450, 800, and 850 micron of the dark cloud LDN 1689N which harbors the low-mass young stellar objects (YSOs) IRAS 16293-2422A a…
The Birth of a Super Star Cluster: NGC 5253
Jean L. Turner, Sara C. Beck
We present images of the 7mm free-free emission from the radio "supernebula" in NGC 5253 made with the Very Large Array and the Pie Town link. The images reveal structure in the ne…
Watching the Birth of Super Star Clusters
Jean L. Turner, Sara C. Beck
Subarcsecond infrared and radio observations yield important information about the formation of super star clusters from their surrounding gas. We discuss the general properties of…
An extragalactic supernebula confined by gravity
J. L. Turner, S. C. Beck, L. P. Crosthwaite +3
Little is known about the origins of the giant star clusters known as globular clusters. How can hundreds of thousands of stars form simultaneously in a volume only a few light yea…
Radio-Infrared Supernebulae in II Zw 40
S. C. Beck, J. L. Turner, L. E. Langland-Shula +3
We report subarcsecond-resolution VLA and Keck mid-infrared imaging of the dwarf starburst galaxy II Zw 40. II Zw 40 contains a bright, compact thermal radio and infrared source wi…
Molecular Gas and the Young Starburst in NGC 5253, Revisited
David S. Meier, Jean L. Turner, Sara C. Beck
We report the detection of CO(2-1) and 3.1 mm and 1.3 mm continuum emission towards the extremely young starburst in NGC 5253, with data taken from the Owens Valley Millimeter Arra…
Molecular Gas and Star Formation in NGC 3077
David S. Meier, Jean L. Turner, Sara C. Beck
We present high resolution (~2.5'') CO(1-0) and CO(2-1) images of the central kiloparsec of NGC 3077 made with the Owens Valley Millimeter Array. CO emission is distributed in thre…
Infrared Emission from Clusters in the Starforming Disk of He2-10
S. C. Beck, J. L. Turner, V. Gorjian
We have made subarcsecond-resolution images of the central 10" of the Wolf-Rayet dwarf galaxy He 2-10 at 11.7 microns, using the Long Wavelength Spectrometer on the Keck Telescope.…
Infrared Emission from the Radio Supernebula in NGC 5253: A Proto-Globular Cluster?
Varoujan Gorjian, Jean L. Turner, Sara C. Beck
Hidden from optical view in the starburst region of the dwarf galaxy NGC 5253 lies an intense radio source with an unusual spectrum which could be interpreted variously as nebular…
Warm Molecular Gas in Dwarf Starburst Galaxies: CO(3-2) Observations
David S. Meier, Jean L. Turner, Lucian P. Crosthwaite +1
Eight dwarf starburst galaxies have been observed with the Caltech Submillimeter Observatory (CSO) telescope in the CO J= 3 - 2 transition. The galaxies observed are He 2-10, NGC 5…
Properties of Hot Stars in the Wolf-Rayet galaxy NGC5253 from ISO Spectroscopy
Paul A. Crowther, S. C. Beck, Allan J. Willis +3
ISO-SWS spectroscopy of the WR galaxy NGC5253 is presented, and analysed to provide estimates of its hot young star population. Our approach differs from previous investigations in…
The Infrared Nucleus of the Wolf-Rayet Galaxy Henize 2-10
S. C. Beck, D. M. Kelly, J. H. Lacy
We have obtained near-infrared images and mid-infrared spectra of the starburst core of the dwarf Wolf-Rayet galaxy He 2-10. We find that the infrared continuum and emission lines…