A5100620543- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- Pulsars and Gravitational Waves Research
- Magnetic confinement fusion research
- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Phase Equilibria and Thermodynamics
Virginia Tech
2023-2024
Context. Quasar outflows are key players in the feedback processes that influence evolution of galaxies and intergalactic medium. The chemical abundance these provides crucial insights into their origin impact. Aims. We determine absolute abundances nitrogen sulfur physical conditions outflow seen quasar 3C298. Methods. analyzed archival spectral data from Hubble Space Telescope for measured ionic column densities absorption troughs compared results to photoionization predictions made with...
Abstract Measuring the distance of quasar outflows from central source ( R ) is essential for determining their importance active galactic nucleus feedback. There are two methods to measure : (1) a direct determination using spatially resolved integral field spectroscopy (IFS) outflow in emission and (2) an indirect method that uses absorption troughs ionic excited states. The column density ratio between resonance states yields number density. Combined with knowledge outflow’s ionization...
Abstract Quasar feedback is routinely invoked as an indispensable ingredient in galaxy formation models. Galactic outflows are a crucial agent of quasar that frequently manifest themselves absorption and emission lines. Measuring the size energetics based on lines remains challenge, integral field spectroscopy (IFS) mapping complementary. We present Very Large Telescope (VLT)/SINFONI IFS 3C 191 at z ∼ 2, which outflow has been analyzed line spectroscopy. Three components found morphology...
Context. Quasar outflows play a significant role in the active galactic nucleus (AGN) feedback, impacting interstellar medium and potentially influencing galaxy evolution. Characterizing these is essential for understanding AGN-driven processes. Aims. We aim to analyze physical properties of mini-broad absorption line outflow quasar J1402+2330 using data from Dark Energy Spectroscopic Instrument (DESI) survey. seek measure location, energetics, potential impact on AGN feedback Methods. In...
Context. Quasar outflows play a significant role in the active galactic nucleus (AGN) feedback, impacting interstellar medium and potentially influencing galaxy evolution. Characterizing these is essential for understanding AGN-driven processes. Aims. We aim to analyze physical properties of mini-broad absorption line outflow quasar J1402+2330 using data from Dark Energy Spectroscopic Instrument (DESI) survey. seek measure outflow’s location, energetics, potential impact on AGN feedback...
ABSTRACT In the Hubble Space Telescope/Cosmic Origins Spectrograph spectrum of Seyfert 1 galaxy 2MASX J14292507+4518318, we have identified a narrow absorption line outflow system with velocity −151 km s−1. This exhibits troughs from resonance states ions like C iv, N v, S and Si ii, as well excited ii* ii*. Our investigation involved measuring ionic column densities conducting photoionization analysis. These allow total density to be estimated log NH = 19.84 cm−2, its ionization parameter...
Context. Quasar outflows are often analyzed to determine their ability contribute active galactic nucleus (AGN) feedback. We identified a broad absorption line (BAL) outflow in the VLT/UVES spectrum of quasar SDSS J1321−0041. The shows troughs from Fe II , and is thus categorized as an FeLoBAL. This outfow unusual among population FeLoBAL outflows, it displays C Si BALs. Aims. Outflow systems require kinetic luminosity above ∼0.5% quasar’s AGN For this reason, we J1321−0041 outflow’s...
Abstract We observed the Seyfert 1 galaxy Mrk 817 during an intensive multiwavelength reverberation mapping campaign for 16 months. Here, we examine behavior of narrow UV absorption lines seen in Hubble Space Telescope/Cosmic Origins Spectrograph spectra, both and other epochs extending over 14 yr. conclude that, while outflow system (at −3750 km s −1 with FWHM = 177 ) responds to variations continuum as modified by X-ray obscurer, its total column density (log N H 19.5 <mml:math...
The study of quasar outflows is essential for understanding the connection between active galactic nuclei (AGN) and their host galaxies. We analyzed VLT/UVES spectrum SDSS J0932+0840 identified several narrow broad outflow components in absorption, with multiple ionization species including Fe II . This places it among rare class known as iron low-ionization absorption line (FeLoBALs). studied one to determine its physical characteristics by determining total hydrogen column density,...
We observed the Seyfert 1 galaxy Mrk817 during an intensive multi-wavelength reverberation mapping campaign for 16 months. Here, we examine behavior of narrow UV absorption lines seen in HST/COS spectra, both and other epochs extending over 14 years. conclude that while outflow system (at -3750 km/s with FWHM=177 km/s) responds to variations continuum as modified by X-ray obscurer, its total column density (logNH =19.5 cm-2) did not change across all epochs. The adjusted ionization parameter...
Context. Quasar outflows are key players in the feedback processes that influence evolution of galaxies and intergalactic medium. The chemical abundance these provides crucial insights into their origin impact. Aims. To determine absolute abundances nitrogen sulfur physical conditions outflow seen quasar 3C298. Methods. We analyze archival spectral data from Hubble Space Telescope (HST) for measure Ionic column densities absorption troughs compare results to photoionization predictions made...
Context: The study of quasar outflows is essential in understanding the connection between active galactic nuclei (AGN) and their host galaxies. We analyze VLT/UVES spectrum SDSS J0932+0840 identify several narrow broad outflow components absorption, with multiple ionization species including Fe II, which puts it among a rare class known as FeLoBALs. Aims: one to determine its physical characteristics by determining total hydrogen column density, parameter number density. Through these...
Context. Quasar outflows are often analyzed to determine their ability contribute active galactic nucleus (AGN) feedback. We identified a broad absorption line (BAL) outflow in the VLT/UVES spectrum of quasar SDSS J1321-0041. The shows troughs from Fe II, and is thus categorized as an FeLoBAL. This unusual among population FeLoBAL outflows, it displays C II Si BALs. Aims. Outflow systems require kinetic luminosity above $\sim0.5\%$ quasar's AGN For this reason, we J1321-0041 outflow's...
In the HST/COS spectrum of Seyfert 1 galaxy 2MASX J14292507+4518318, we have identified a narrow absorption line (NAL) outflow system with velocity -151 km s$^{-1}$ This exhibits troughs from resonance states ions like CIV, NV, SiIV, and SiII, as well excited CII*, SiII*. Our investigation involved measuring ionic column densities conducting photoionization analysis. These yield total density to be estimated $\log N_{H}$=19.84 [cm$^{-2}]$, its ionization parameter U_{H}$=$-$2.0 electron...