A5086490502- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Calibration and Measurement Techniques
- Spectroscopy and Laser Applications
- Astro and Planetary Science
- Optical Systems and Laser Technology
- History and Developments in Astronomy
- Laser-induced spectroscopy and plasma
- Advanced Chemical Physics Studies
- Solar and Space Plasma Dynamics
- Advanced Semiconductor Detectors and Materials
- Particle Accelerators and Free-Electron Lasers
- Atmospheric and Environmental Gas Dynamics
- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Autopsy Techniques and Outcomes
Space Telescope Science Institute
2019-2025
University of Maryland, College Park
2012-2021
Goddard Space Flight Center
2006-2018
Wyle (United States)
2016-2018
Joint Space Science Institute
2017
Johns Hopkins University
2010-2014
Institute of Forensic Sciences
2013
Deleted Institution
2010
Catholic University of America
2007-2009
Instituto Venezolano de Investigaciones Científicas
2003-2005
We report the results from a systematic search for molecular (OH 119 μm) outflows with Herschel/PACS in sample of 43 nearby (z < 0.3) galaxy mergers, mostly ultraluminous infrared galaxies (ULIRGs) and QSOs. find that character OH feature (strength absorption relative to emission) correlates 9.7 μm silicate feature, measure obscuration ULIRGs. Unambiguous evidence outflows, based on detection profiles median velocities more blueshifted than −50 km s−1, is seen 26 (70%) 37 OH-detected...
Abstract The James Webb Space Telescope (JWST) is a large, infrared space telescope that has recently started its science program which will enable breakthroughs in astrophysics and planetary science. Notably, JWST provide the very first observations of earliest luminous objects universe start new era exoplanet atmospheric characterization. This transformative enabled by 6.6 m passively cooled with 5 layer sunshield. primary mirror comprised 18 controllable, low areal density hexagonal...
Abstract We report on the energetics of molecular outflows in 14 local ultraluminous infrared galaxies (ULIRGs) that show unambiguous outflow signatures (P Cygni profiles or high-velocity absorption wings) far-infrared lines OH measured with Herschel /PACS spectrometer. All sample are gas-rich mergers at various stages merging process. Detection both ground-state (at 119 and 79 μ m) one more radiatively excited 65 84 allows us to model nuclear gas (≲300 pc) extended components using...
In Tombesi et al. (2015), we reported the first direct evidence for a quasar accretion disk wind driving massive molecular outflow. The target was F11119+3257, an ultraluminous infrared galaxy (ULIRG) with unambiguous type-1 optical broad emission lines. energetics of and outflow were found to be consistent predictions feedback models where is driven by hot energy-conserving bubble inflated inner wind. However, this conclusion uncertain because estimated from optically thick OH 119 um...
We have studied the relationship between [O IV] 25.89 μm emission-line luminosities, obtained from Spitzer spectra, X-ray continua in 2-10 keV band, primarily ASCA, and 14-195 band with SWIFT Burst Alert Telescope (BAT), for a sample of nearby (z < 0.08) Seyfert galaxies. For comparison, we examined III] λ5007, keV, luminosities same set objects. find that both are well correlated BAT luminosities. When comparing different types galaxies, 2s significantly lower to ratios than 1s. suggest...
We investigate the location of an ultra-hard X-ray selected sample active galactic nuclei (AGN) from Swift Burst Alert Telescope (BAT) catalogue with respect to main sequence (MS) star-forming galaxies using Herschel-based measurements star formation rate (SFR) and M*'s Sloan Digital Sky Survey photometry where AGN contribution has been carefully removed. construct MS Herschel Reference Stripe 82 exact same methods measure SFR M* as Swift/BAT AGN. find that a large fraction lie below...
We report on the Herschel/PACS observations of OH in Mrk 231, with detections 9 doublets observed within PACS range, and present radiative transfer models for outflowing OH. Signatures gas are found up to 6 different excitation requirements. At least two components identified, one radiatively excited, other low excitation, presumably spatially extended. Particularly prominent, blue wing absorption detected in-ladder 2Pi_{3/2} J=9/2-7/2 doublet at 65 um, E_lower=290 K, indicates that excited...
We combine the Herschel Space Observatory PACS and SPIRE photometry with archival WISE to construct spectral energy distributions (SED) for over 300 local ($z < 0.05$), ultra-hard X-ray (14 - 195 keV) selected active galactic nuclei (AGN) from Swift Burst Alert Telescope (BAT) 58 month catalogue. Using a simple analytical model that combines an exponentially cut-off powerlaw single temperature modified blackbody, we decompose SEDs into host-galaxy AGN component. calculate dust masses,...
A detailed analysis of the radiative and Auger de-excitation channels K-shell vacancy states in Fe ii–Fe ix has been carried out. Level energies, wavelengths, A-values, rates fluorescence yields have calculated for lowest fine-structure levels populated by photoionization ground state parent ion. Different branching ratios, namely K/K, Kβ/Kα, KLM/KLL, KMM/KLL, total yields, , obtained present work compared with other theoretical data solid-state measurements, finding good general agreement...
Abstract We present new James Webb Space Telescope (JWST) Mid-Infrared Instrument Medium-Resolution Spectrometer observations of the nearby ultraluminous infrared galaxy (ULIRG) F08572+3915 NW. These integral field spectroscopic (IFS) data reveal a kpc-scale warm-molecular rotating disk and biconical outflow traced by H 2 ν = 0–0 S(1), S(2), S(3), S(5) rotational transitions. The maintains relatively constant median (maximum) projected velocity 1100 km s −1 (3000 ) out to ∼1.4 kpc from...
Abstract We investigate the star formation–active galactic nucleus (AGN) connection in Seyfert 1 NGC 7469 using James Webb Space Telescope mid-infrared spectroscopic integral field unit (IFU) data. use IFU data to generate maps of different emission lines present spectrum, such as formation (SF) tracer [Ne ii ] 12.81 μ m and AGN v 14.32 m. can separate AGN- SF-dominated regions spatially resolved diagnostic diagrams, we further ionization sources powering each region by constructing...
We compare mid-infrared emission-line properties, from high-resolution Spitzer spectra of a hard X-ray (14 -- 195 keV) selected sample nearby (z < 0.05) AGN detected by the Burst Alert Telescope (BAT) aboard Swift. The luminosity distribution for emission-lines, [O IV] 25.89 micron, [Ne II] 12.81 III] 15.56 micron and V] 14.32/24.32 continuum show no differences between Seyfert 1 2 populations, however six newly discovered BAT AGNs are under-luminous in IV], most likely result dust...
We have studied the relationship between high-and low-ionization [O IV] λ25.89 µm, [Ne III] λ15.56 µm and II] λ12.81 emission lines with aim of constraining active galactic nuclei (AGN) star formation contributions for a sample 103 Seyfert galaxies.We used
Context. The LIRG Zw 049.057 contains a compact obscured nucleus where considerable amount of the galaxy's luminosity is generated. This dusty environment that rich in molecular gas. One approach to probing this kind and revealing what hidden behind dust study rotational lines molecules couple well with IR radiation emitted by dust. Methods. We observed PACS SPIRE onboard Herschel Space Observatory H2O, H218O, OH, 18OH, [O I]. modeled unresolved core galaxy using spherically symmetric...
ABSTRACT We present the results from a systematic search for galactic-scale, molecular (OH 119 μ m) outflows in sample of 52 Local Volume ( <?CDATA $d\lt 50$?> Mpc) Burst Alert Telescope detected active galactic nuclei (BAT AGNs) with Herschel -PACS. combine our analysis BAT AGNs published /PACS data 43 nearby $z\lt 0.3$?> ) galaxy mergers, mostly ultra-luminous infrared galaxies (ULIRGs) and QSOs. The objects have, on average, $\sim 10\mbox{--}100$?> times lower AGN luminosities, star...
Far-Infrared (FIR) photometry from the Photodetector Array Camera and Spectrometer on Herschel Space Observatory is presented for 313 nearby, hard X-ray selected galaxies 58 month Swift Burst Alert Telescope (BAT) Active Galactic Nuclei catalog. The present data do not distinguish between FIR luminosity distributions at 70 160 μm Seyfert 1 2 galaxies. This result suggests that if emission nuclear obscuring material surrounding accretion disk, then it emits isotropically, independent of...
Herschel/PACS observations of 29 local (ultra)luminous infrared galaxies, including both starburst and active galactic nucleus (AGN) dominated sources as diagnosed in the mid-infrared/optical, show that equivalent width absorbing OH 65 μm Π3/2 J = 9/2–7/2 line (Weq(OH65)) with lower level energy Elow ≈ 300 K, is anticorrelated [C ii]158 to far-infrared luminosity ratio, correlated per unit gas mass 60-to-100 color. While all are LIR/MH2 > 50L☉/M☉ mode derived from previous CO studies, OH65...
We present far-infrared (FIR) and submillimeter photometry from the Herschel Space Observatory's Spectral Photometric Imaging Receiver (SPIRE) for 313 nearby z<0.05 active galactic nuclei (AGN). selected AGN 58 month Swift Burst Alert Telescope (BAT) catalog, result of an all-sky survey in 14-195 keV energy band, allowing a reduction selection effects due to obscuration host galaxy contamination. find 46% (143/313) our sample is detected at all three wavebands combined with PACS observations...
Abstract We select a sample of 1437 active galactic nuclei (AGN) from the catalog Sloan Digital Sky Survey galaxy properties Portsmouth group by detection high-ionization [Ne v ] 3426 Å emission line. compare fluxes III 3869 Å, [O 5007 II 3726, 3728 and i 6300 to that v]. All four lines show strong linear correlation with v], although ions lower ionization potentials have coefficient. investigate use two forbidden line ratio diagnostic diagrams do not rely on H α in order classify...
Aims.This work reports radiative transition rates and electron impact excitation rate coefficients for levels of the n = 3, 4, 5, 6, 7, 8 configurations .
We present early results of the Herschel PACS (70 and 160 μm) SPIRE (250, 350, 500 survey 313 low redshift (z < 0.05), ultra-hard X-ray (14–195 keV) selected active galactic nuclei (AGNs) from 58 month Swift/Burst Alert Telescope catalog. Selection AGNs X-rays avoids bias obscuration, providing a complete sample to study connection between nuclear activity star formation in host galaxies. With high angular resolution PACS, we find that >35% >20% sources are "point-like" at 70 μm respectively...
The blue compact dwarf galaxy I Zw 18 is one of the most metal poor systems known in local Universe (12 + log(O/H) $=$ 7.17). In this work we study using data from {\it Spitzer}, Herschel Space Telescope} and IRAM Plateau de Bure Interferometer. Our set includes sensitive maps 18, to date, both, far infrared CO $J=1\rightarrow0$ transition. We use dust emission models derive a mass upper limit only M$_{dust}\leq1.1\times10^4$ M$_{\odot}$ ($3\sigma$ limit). This driven by non-detection at 160...
ABSTRACT New near- and far-ultraviolet (NUV FUV) Hubble Space Telescope spectra of Mrk 231, the nearest quasar known, are combined with ground-based optical to study remarkable dichotomy between FUV NUV–optical spectral regions in this object. The emission-line features faint, broad, highly blueshifted (up ∼7000 km s −1 ), no significant accompanying absorption. In contrast, profiles NUV absorption resemble those Na i D, He , Ca ii H K lines, exhibiting broad troughs that overlap velocity...