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A 42.3-43.6 GHz spectral survey of Orion BN/KL: First detection of the v=0 J=1-0 line from the isotopologues 29SiO and 30SiO
C. Goddi, L. J. Greenhill, E. M. L. Humphreys +3
We have surveyed molecular line emission from Orion BN/KL from 42.3 to 43.6 GHz with the Green Bank Telescope. Sixty-seven lines were identified and ascribed to 13 different molecu…
HI Imaging Observations of Superthin Galaxies. II. IC2233 and the Blue Compact Dwarf NGC2537
Lynn D. Matthews, Juan M. Uson
We have used the VLA to image the HI 21-cm line emission in the edge-on Sd galaxy IC2233 and the blue compact dwarf NGC2537. We also present new optical B,R, and H alpha imaging of…
VLA Observations of HI in the Circumstellar Envelopes of Asymptotic Giant Branch Stars
Lynn D. Matthews, Mark J. Reid
(Abridged) We have used the VLA to search for neutral atomic hydrogen in the circumstellar envelopes of five AGB stars. We have detected HI 21-cm emission coincident in both positi…
VLA Observations of HI in the Circumstellar Envelopes of AGB Stars
Lynn D. Matthews, Mark J. Reid
We present the results of a VLA search for HI emission in the circumstellar envelopes of five nearby AGB stars: RS Cnc, IRC+10216, EP Aqr, R Cas, and R Aqr. We have detected emissi…
First Resolved Images of the Mira AB Symbiotic Binary at Centimeter Wavelengths
Lynn D. Matthews, Margarita Karovska
We report the first spatially resolved radio continuum measurements of the Mira AB symbiotic binary system, based on observations obtained with the Very Large Array (VLA). This is…
Detections of CO in Late-Type, Low Surface Brightness Spiral Galaxies
Lynn D. Matthews, Yu Gao, Juan M. Uson +1
Using the IRAM 30-m telescope, we have obtained 12CO J=1-0 and 2-1 spectral line observations toward the nuclear regions of 15 edge-on, low surface brightness (LSB) spiral galaxies…
Clues on the Structure and Composition of Galactic Disks from Studies of "Superthin" Spirals: the Case of UGC3697
Lynn D. Matthews, Juan M. Uson
We summarize results from an HI+optical imaging study of the ``Integral Sign'' galaxy, UGC3697. UGC3697 is a low-mass, Sd spiral that exhibits a ``superthin'' disk morphology despi…
Optical Imaging and Spectroscopy of the Edge-On Sbc Galaxy UGC10043: Evidence for a Galactic Wind and a Peculiar Triaxial Bulge
L. D. Matthews, R. de Grijs
We present new optical imaging and spectroscopy of the peculiar, edge-on Sbc galaxy UGC10043. B & R imaging reveals that the inner bulge of UGC10043 is elongated perpendicular to t…
High-Latitude HI in the Low Surface Brightness Galaxy UGC7321
L. D. Matthews, Kenneth Wood
From the analysis of sensitive HI 21-cm line observations, we find evidence for vertically extended HI emission (|z|<~2.4 kpc) in the edge-on, low surface brightness spiral galaxy…
UV-Optical Pixel Maps of Face-On Spiral Galaxies -- Clues for Dynamics and Star Formation Histories
Paul B. Eskridge, Jay A. Frogel, Violet A. Taylor +8
UV and optical images of the face-on spiral galaxies NGC 6753 and NGC 6782 reveal regions of strong on-going star formation that are associated with structures traced by the old st…
An HST Survey of the mid-UV Morphology of Nearby Galaxies
R. A. Windhorst, V. A. Taylor, R. A. Jansen +12
(Abbreviated) We present an imaging survey of 37 nearby galaxies observed with HST/WFPC2 in the mid-UV F300W filter and in F814W. 11 galaxies were also imaged in F255W. These galax…
High-Resolution Optical Rotation Curves of Low-Luminosity Spiral Galaxies
L. D. Matthews, J. S. Gallagher, III
We present optical longslit spectroscopic observations of 21 low-luminosity, extreme late-type spiral galaxies. Our sample is comprised of Sc-Sm Local Supercluster spirals with mod…
Modelling the Interstellar Medium of Low Surface Brightness Galaxies: Constraining Internal Extinction, Disk Color Gradients, and Intrinsic Rotation Curve Shapes
L. D. Matthews, Kenneth Wood
We use a combination of three-dimensional Monte Carlo radiative transfer techniques and multi-wavelength (BRHK,H alpha) imaging data to investigate the nature of the interstellar m…
Starbursts and the Evolution of Gas-Rich Galaxies
John S. Gallagher, Christopher J. Conselice, Lynn D. Matthews +1
Moderately luminous starbursts in the nearby universe often occur in disk galaxies that are at most subject to mild external perturbations. An investigation of this type of galaxy…
Properties of `Superthin' Galaxies
L. D. Matthews, W. van Driel, J. S. Gallagher
`Superthins' are a subset of edge-on spiral galaxies exhibiting disks with large axial ratios (a/b>10), extraordinarily small stellar scale heights, and no bulge component. These a…
The Extraordinary `Superthin' Spiral Galaxy UGC7321. I. Disk Color Gradients and Global Properties from Multiwavelength Observations
L. D. Matthews, J. S. Gallagher, W. van Driel
We present B- and R-band imaging and photometry, H-alpha narrow-band imaging, NIR H-band imaging, and HI 21-cm spectroscopy of the nearby Sd spiral galaxy UGC7321. UGC7321 exhibits…
An Exploration of the Tully-Fisher Relation for Extreme Late-Type Spiral Galaxies
L. D. Matthews, W. van Driel, J. S. Gallagher
This paper explores the adherence of 47 extreme late-type galaxies to the B- and V-band Tully-Fisher relations defined by a sample of local calibrators. In both bands we find the m…
B and V CCD Photometry of Southern, Extreme Late-Type Spiral Galaxies
Lynn D. Matthews, John S. Gallagher
We present B and V CCD aperture photometry for a morphologically-selected sample of forty-nine southern, extreme late-type spiral galaxies. All objects are moderate-to-low surface…
NEW INSIGHTS INTO NON-RADIATIVE HEATING IN LATE-A STAR CHROMOSPHERES
Frederick M. Walter, Lynn D. Matthews, Jeffrey L. Linsky
Using new and archival spectra from the Goddard High Resolution Spectrograph, we have searched for evidence of chromospheric and transition region emission in six stars of mid- to…