253 citations · 4.2k across the 85 of their papers we have counts for
45 papers · 1 filter
The case for optical interferometric polarimetry
Nicholas M. Elias, Carol E. Jones, Henrique R. Schmitt +3
Within the last 10 years, long-baseline optical interferometry (LBOI) has benefited significantly from increased sensitivity, spatial resolution, and spectral resolution, e.g., mea…
The CaT strength in Seyfert nuclei revisited: analyzing young stars and non-stellar light contributions to the spectra
L. R. Vega, N. V. Asari, R. Cid Fernandes +4
In a former paper (Garcia-Rissmann et al. 2005; hereafter Paper I), we have presented spectra of 64 active, 9 normal and 5 Starburst galaxies in the region around the near-IR Calci…
Solving the Imaging Problem with Coherently Integrated Multiwavelength Data
H. R. Schmitt, T. A. Pauls, J. T. Armstrong +7
Recovering images from optical interferometric observations is one of the major challenges in the field. Unlike the case of observations at radio wavelengths, in the optical the at…
Constraining the Physical Parameters of the Circumstellar Disk of chi Ophiuchi
C. Tycner, C. E. Jones, T. A. A. Sigut +4
We present a numerical model describing a circularly symmetric gaseous disk around the Be star chi Ophiuchi. The model is constrained by long-baseline interferometric observations…
Measurements of binary stars with coherent integration of NPOI data
Anders M. Jorgensen, H. Schmitt, R. Hindsley +5
In this paper we use coherently integrated visibilities (see separate paper in these proceedings, Jorgensen et al. 2008) to measure the properties of binary stars. We use only the…
Practical Coherent Integration with the NPOI
Anders M. Jorgensen, Dave Mozurkewich, Henrique Schmitt +4
In this paper we will discuss the current status of coherent integration with the Navy Prototype Optical Interferometer (NPOI) (Armstrong et al. 2008). Coherent integration relies…
New Indicators for AGN Power: The Correlation Between [O IV] lambda 25.89 micron and Hard X-ray Luminosity for Nearby Seyfert Galaxies
M. Meléndez, S. B. Kraemer, B. K Armentrout +7
We have studied the relationship between the [O IV] lambda 25.89 micron emission line luminosities, obtained from Spitzer spectra, the X-ray continua in the 2-10 keV band, primaril…
Probing the Ionization Structure of the Narrow Line Region in the Seyfert 1 Galaxy NGC 4151
S. B. Kraemer, H. R. Schmitt, D. M. Crenshaw
We present a study of the distribution of [O III] 5007 and [O II] 3727 emission in the Narrow Line Region (NLR) of the Seyfert 1 galaxy NGC 4151. While the NLR of NGC 4151 ex…
Mapping of the molecular gas inflow towards the Seyfert nucleus of NGC4051 using Gemini NIFS
Rogemar A. Riffel, Thaisa Storchi-Bergmann, Claudia Winge +3
We present two-dimensional (2D) stellar and gaseous kinematics of the inner ~130x180 pc^2 of the Narrow Line Seyfert 1 galaxy NGC4051 at a sampling of 4.5 pc, from near-infrared K-…
HST/WFPC2 imaging of the circumnuclear structure of LLAGNs. I Data and nuclear morphology
R. M. Gonzalez Delgado, E. Perez, R. Cid Fernandes +1
To advance our knowledge of the nature of the central source in LLAGNs and its relation with stellar clusters, we are carrying out several imaging projects with HST at near-UV, opt…
An Atlas of the circumnuclear regions of 75 Seyfert galaxies in the near-UV with HST Advanced Camera for Surveys
Víctor M. Muñoz Marín, Rosa M. González Delgado, Henrique R. Schmitt +5
We present an atlas of the central regions of 75 Seyfert galaxies imaged in the near-UV with the Advanced Camera for Surveys of the Hubble Space Telescope at an average resolution…
The 74MHz System on the Very Large Array
N. E. Kassim, T. J. W. Lazio, W. C. Erickson +7
The Naval Research Laboratory and the National Radio Astronomy Observatory completed implementation of a low frequency capability on the VLA at 73.8 MHz in 1998. This frequency ban…
Tracing Ghost Cavities with Low Frequency Radio Observations
Tracy Clarke, Elizabeth Blanton, Craig Sarazin +5
We present X-ray and multi-frequency radio observations of the central radio sources in several X-ray cavity systems. We show that targeted radio observations are key to determinin…
Vega is a rapidly rotating star
D. M. Peterson, C. A. Hummel, T. A. Pauls +8
Vega, the second brightest star in the northern hemisphere, serves as a primary spectral type standard. While its spectrum is dominated by broad hydrogen lines, the narrower lines…
Ultraviolet-to-Far-Infrared Properties of Local Star-Forming Galaxies
H. R. Schmitt, D. Calzetti, L. Armus +5
We present the results of a multiwavelength study of nearby galaxies, aimed at understanding the relation between the ultraviolet and far-infrared emission in star-forming galaxies…
Multiwavelength star formation indicators: Observations
H. R. Schmitt, D. Calzetti, L. Armus +5
We present a compilation of multiwavelength data on different star formation indicators for a sample of nearby star forming galaxies. Here we discuss the observations, reductions a…
An atlas of Calcium triplet spectra of active galaxies
A. Garcia-Rissmann, L. R. Vega, N. V. Asari +4
We present a spectroscopic atlas of active galactic nuclei covering the region around the 8498, 8542, 8662 Calcium triplet (CaT) lines. The sample comprises 78 objects, divided int…
The Stellar Populations of Low Luminosity Active Galactic Nuclei. III: Spatially Resolved Spectral Properties
R. Cid Fernandes, R. M. Gonzalez Delgado, T. Storchi-Bergmann +2
In a recent survey of the stellar populations of LINERS and LINER/HII Transition Objects (TOs) we identified a numerous class of nuclei which stand out because of their conspicuous…
Transition (LINER/HII) nuclei as evolved Composite (Seyfert 2/Starburst) nuclei
Thaisa Storchi-Bergmann, C. H. Brandt, R. Cid Fernandes +2
We compare the circumnuclear stellar population and environmental properies of Seyfert and Composite (Seyfert + Starburst) nuclei with those of LINERs and LINER/HII transition gala…
The role of interactions
H. R. Schmitt
Interactions between galaxies are suggested to be a mechanism responsible for feeding Active Galactic Nuclei (AGN). Theoretical models show that interactions are an efficient way t…
Stellar Population in LLAGN.I: Ground-based observations
Roberto Cid Fernandes, Rosa M. Gonzalez Delgado, Henrique Schmitt +6
(Abridge): We present a spectroscopic study of the stellar populations of Low Luminosity AGN (LLAGN). Our main goal is to determine whether the stars who live in the innermost (100…
Stellar Population in LLAGN.II: STIS observations
Rosa M. Gonzalez Delgado, Roberto Cid Fernandes, Enrique Perez +5
We present a study of the stellar population in Low Luminosity AGN (LLAGN). Our goal is to search for spectroscopic signatures of young and intermediate age stars, and to investiga…
A Hubble Space Telescope Survey of Extended [OIII]5007A Emission in a Far-Infrared Selected Sample of Seyfert Galaxies: Results
H. R. Schmitt, J. L. Donley, R. R. J. Antonucci +3
We present the results of a Hubble Space Telescope (HST) survey of extended [OIII] emission in a sample of 60 nearby Seyfert galaxies (22 Seyfert 1's and 38 Seyfert 2's), selected…
A Hubble Space Telescope Survey of Extended [OIII]5007A Emission in a Far-Infrared Selected Sample of Seyfert Galaxies: Observations
H. R. Schmitt, J. L. Donley, R. R. J. Antonucci +2
We present a Hubble Space Telescope (HST) survey of extended [OIII] emission for a sample of 60 Seyfert galaxies (22 Seyfert 1's and 38 Seyfert 2's), selected based on their far in…