S. B. Kraemer
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View article: Hubble Space Telescope Observations of Nearby Type 1 Quasars. I. Characterisation of the Extended [O III] 5007Å Emission
Hubble Space Telescope Observations of Nearby Type 1 Quasars. I. Characterisation of the Extended [O III] 5007Å Emission Open
We use the Hubble Space Telescope to analyse the extended [O III] 5007A emission in seven bright radio-quiet type 1 quasars (QSO1s), focusing on the morphology and physical conditions of their extended Narrow-Line Regions (NLRs). We find N…
View article: Determining the Extents, Geometries, and Kinematics of Narrow-Line Region Outflows in Nearby Seyfert Galaxies
Determining the Extents, Geometries, and Kinematics of Narrow-Line Region Outflows in Nearby Seyfert Galaxies Open
Outflowing gas from supermassive black holes in the centers of active galaxies has been postulated as a major contributor to galactic evolution. To explore the interaction between narrow-line region (NLR) outflows and their host galaxies, …
View article: Supermassive Black Hole Winds in X-rays: SUBWAYS
Supermassive Black Hole Winds in X-rays: SUBWAYS Open
The detection of blueshifted absorption lines likely associated with ionized iron K-shell transitions in the X-ray spectra of many active galactic nuclei (AGNs) suggests the presence of a highly ionized gas outflowing with mildly relativis…
View article: No Small Scale Radio Jets Here: Multi-Epoch Observations of Radio Continuum Structures in NGC 1068 with the VLBA
No Small Scale Radio Jets Here: Multi-Epoch Observations of Radio Continuum Structures in NGC 1068 with the VLBA Open
We present recent Very Long Baseline Array (VLBA) 5 GHz radio observations of the nearby, luminous Seyfert 2 galaxy NGC 1068 for comparison to similar VLBA observations made on 1997 April 26. By cross-correlating the positions of emitting …
View article: Investigating the Narrow-line Region Dynamics in Nearby Active Galaxies
Investigating the Narrow-line Region Dynamics in Nearby Active Galaxies Open
We present dynamical models of the narrow-line region (NLR) outflows in the nearby Seyfert galaxies Mrk 3, Mrk 78, NGC 1068, and NGC 4151 using observations from the Hubble Space Telescope and Apache Point Observatory. We employ long-slit …
View article: Investigating the Narrow Line Region Dynamics in Nearby Active Galaxies
Investigating the Narrow Line Region Dynamics in Nearby Active Galaxies Open
We present dynamical models of the narrow line region (NLR) outflows in the nearby Seyfert galaxies Mrk 3, Mrk 78, NGC 1068, and NGC 4151 using observations from the Hubble Space Telescope and Apache Point Observatory. We employ long-slit …
View article: A UFO Seen Edge-On: Resolving Ultrafast Outflow Emission on $\sim$200-pc Scales with $Chandra$ in the Active Nucleus of Mrk 34
A UFO Seen Edge-On: Resolving Ultrafast Outflow Emission on $\sim$200-pc Scales with $Chandra$ in the Active Nucleus of Mrk 34 Open
We present $Chandra$ ACIS imaging spectroscopy of the nucleus of the Seyfert 2 Galaxy Mrk 34. We identify spatially and spectrally resolved features in the band that includes Fe K$α$, Fe XXV and Fe XXVI. These features indicate high-veloci…
View article: Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. IV. The Effects of Different Density Estimates on the Ionized Gas Masses and Outflow Rates
Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. IV. The Effects of Different Density Estimates on the Ionized Gas Masses and Outflow Rates Open
Active galactic nuclei (AGN) can launch outflows of ionized gas that may influence galaxy evolution, and quantifying their full impact requires spatially resolved measurements of the gas masses, velocities, and radial extents. We previousl…
View article: Quantifying Feedback from Narrow Line Region Outflows in Nearby Active\n Galaxies. IV. The Effects of Different Density Estimates on the Ionized Gas\n Masses and Outflow Rates
Quantifying Feedback from Narrow Line Region Outflows in Nearby Active\n Galaxies. IV. The Effects of Different Density Estimates on the Ionized Gas\n Masses and Outflow Rates Open
Active galactic nuclei (AGN) can launch outflows of ionized gas that may\ninfluence galaxy evolution, and quantifying their full impact requires\nspatially resolved measurements of the gas masses, velocities, and radial\nextents. We previo…
View article: Radiative Driving of the AGN Outflows in the Narrow-line Seyfert 1 Galaxy NGC 4051* †
Radiative Driving of the AGN Outflows in the Narrow-line Seyfert 1 Galaxy NGC 4051* † Open
We explore the properties of ionized gas in the nuclear and circumnuclear environment of the narrow-line Seyfert 1 galaxy NGC 4051 using spectroscopic and imaging observations from the Hubble Space Telescope (HST) and Apache Point Observat…
View article: Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. III. Results for the Seyfert 2 Galaxies Markarian 3, Markarian 78, and NGC 1068* <sup>†</sup>
Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. III. Results for the Seyfert 2 Galaxies Markarian 3, Markarian 78, and NGC 1068* <sup>†</sup> Open
Outflows of ionized gas driven by active galactic nuclei (AGN) may significantly impact the evolution of their host galaxies. However, determining the energetics of these outflows is difficult with spatially unresolved observations that ar…
View article: Radiative Driving of the AGN Outflows in the Narrow-Line Seyfert 1\n Galaxy NGC 4051
Radiative Driving of the AGN Outflows in the Narrow-Line Seyfert 1\n Galaxy NGC 4051 Open
We explore the properties of ionized gas in the nuclear and circumnuclear\nenvironment of the narrow-line Seyfert 1 galaxy NGC 4051 using spectroscopic\nand imaging observations from the Hubble Space Telescope (HST) and Apache Point\nObser…
View article: Elucidating the global distribution of reprocessing gas in NGC 1194
Elucidating the global distribution of reprocessing gas in NGC 1194 Open
A joint XMM–Newton and NuSTAR observation was conducted for the bright, local Seyfert 1.9 galaxy, NGC 1194. The hard spectral form of this active galactic nucleus (AGN) was modelled using the toroidal reprocessor mytorus. The decoupled mod…
View article: Gemini Near-Infrared Field Spectrograph Observations of the Seyfert 2 Galaxy Mrk 3: Feeding and Feedback on Galactic and Nuclear Scales
Gemini Near-Infrared Field Spectrograph Observations of the Seyfert 2 Galaxy Mrk 3: Feeding and Feedback on Galactic and Nuclear Scales Open
We explore the kinematics of the stars, ionized gas, and warm molecular gas in the Seyfert 2 galaxy Mrk 3 (UGC 3426) on nuclear and galactic scales with Gemini Near-Infrared Field Spectrograph observations, previous Hubble Space Telescope …
View article: Mass outflow of the X-ray emission line gas in NGC 4151
Mass outflow of the X-ray emission line gas in NGC 4151 Open
We have analysed Chandra/High Energy Transmission Gratings spectra of the X-ray emission line gas in the Seyfert galaxy NGC 4151. The zeroth-order spectral images show extended H- and He-like O and Ne, up to a distance r ∼ 200 pc from the …
View article: Outflowing gas in a compact ionization cone in the Seyfert 2 galaxy ESO 153-G20
Outflowing gas in a compact ionization cone in the Seyfert 2 galaxy ESO 153-G20 Open
We present two-dimensional ionized gas and stellar kinematics in the inner 1.4 × 1.9 kpc2 of the Seyfert 2 galaxy ESO 153-G20 obtained with the Gemini-South/Gemini multi-object spectrograph integral field unit (GMOS-IFU) at a spatial resol…
View article: Advanced Astrophysics Discovery Technology in the Era of Data Driven\n Astronomy
Advanced Astrophysics Discovery Technology in the Era of Data Driven\n Astronomy Open
Experience suggests that structural issues in how institutional Astrophysics\napproaches data-driven science and the development of discovery technology may\nbe hampering the community's ability to respond effectively to a rapidly\nchangin…
View article: Advanced Astrophysics Discovery Technology in the Era of Data Driven Astronomy
Advanced Astrophysics Discovery Technology in the Era of Data Driven Astronomy Open
Experience suggests that structural issues in how institutional Astrophysics approaches data-driven science and the development of discovery technology may be hampering the community's ability to respond effectively to a rapidly changing e…
View article: A nuclear ionized gas outflow in the Seyfert 2 galaxy UGC 2024
A nuclear ionized gas outflow in the Seyfert 2 galaxy UGC 2024 Open
As part of a high-resolution observational study of feeding and feedback processes occurring in the vicinity of the active galactic nucleus in 40 galaxies, we observed the inner 3${^{\prime\prime}_{.}}$5 × 5 arcsec of the nearby spiral and…
View article: Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. II. Spatially Resolved Mass Outflow Rates for the QSO2 Markarian 34*†
Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. II. Spatially Resolved Mass Outflow Rates for the QSO2 Markarian 34*† Open
We present spatially resolved mass outflow rate measurements ( ) for the narrow line region of Markarian 34, the nearest Compton-thick type 2 quasar (QSO2). Spectra obtained with the Hubble Space Telescope and at Apache Point Observatory r…
View article: Evolution of the Outflows in NGC 3516
Evolution of the Outflows in NGC 3516 Open
We analyze the 2011 HST /COS spectrum of the Seyfert 1 galaxy NGC 3516, which demonstrates clear changes in one of the intrinsic absorption troughs (component 5), slight evidence of change in a second trough (component 6), and the appearan…
View article: Outflows in the narrow-line region of bright Seyfert galaxies – I. GMOS-IFU data
Outflows in the narrow-line region of bright Seyfert galaxies – I. GMOS-IFU data Open
We present two-dimensional maps of emission-line fluxes and kinematics, as well as of the stellar kinematics of the central few kpc of five bright nearby Seyfert galaxies –Mrk 6, Mrk 79, Mrk 348, Mrk 607, and Mrk 1058 – obtained from obser…
View article: Physical Conditions in Ultra-fast Outflows in AGN
Physical Conditions in Ultra-fast Outflows in AGN Open
XMM-Newton and Suzaku spectra of Active Galactic Nuclei (AGN) have revealed highly ionized gas, in the form of absorption lines from H-like and He-like Fe. Some of these absorbers, ultra-fast outflows (UFOs), have radial velocities of up t…
View article: Disentangling the near-infrared continuum spectral components of the inner 500 pc of Mrk 573: two-dimensional maps
Disentangling the near-infrared continuum spectral components of the inner 500 pc of Mrk 573: two-dimensional maps Open
We present a near infrared study of the spectral components of the continuum\nin the inner 500$\\times$500 pc$^2$ of the nearby Seyfert galaxy Mrk573 using\nadaptive optics near-infrared integral field spectroscopy with the instrument\nNIF…
View article: GEMINI NEAR INFRARED FIELD SPECTROGRAPH OBSERVATIONS OF THE SEYFERT 2 GALAXY MRK 573: IN SITU ACCELERATION OF IONIZED AND MOLECULAR GAS OFF FUELING FLOWS
GEMINI NEAR INFRARED FIELD SPECTROGRAPH OBSERVATIONS OF THE SEYFERT 2 GALAXY MRK 573: IN SITU ACCELERATION OF IONIZED AND MOLECULAR GAS OFF FUELING FLOWS Open
We present near-infrared and optical emission-line and stellar kinematics of the Seyfert 2 galaxy Mrk 573 using the Near-Infrared Field Spectrograph (NIFS) at Gemini North and Dual Imaging Spectrograph at Apache Point Observatory, respecti…