The Central PARSEC of Galaxies using High Spatial Resolution Techniques

Start year
2003
    General
    Description

    PARSEC is a multi-wavelength investigation of the central PARSEC of the nearest galaxies. We work on black-hole accretion and its most energetic manifestations: jets and hot spots, and on its  circumnuclear environment conditions for star formation. We resort to the highest available angular resolution observations from gamma-rays to the centimetre, and pursue a physical interpretation in the context of computational astrophysics. We also work on  development of Adaptive Optics instrumentation for large telescopes. PARSEC projects are:

    PARSEC - Black-Hole activity: The galaxies under study span a wide range of nuclear activity, from quiesent to low luminosity active nuclei to the Seyfert and Qso phase. PARSEC investigates the origin and morphology of dust and gas in the central parsec of active and normal galaxies, those being the pre-conditions for the onset of Black-Hole activity. The spectral energy distribution of the central few parsecs is investigated as a function of nuclear activity and accretion disc efficency. The nature and shape of the ionizing continuum are traced with high ionization coronal lines. 

    PARSEC - Jets and Hot-Spots: PARSEC further studies the most energetic manisfestations of Black-Hole activity: jets and hot-spots, in the PAIS project.

    PARSEC -Star-formation: Nuclear star formation spatially resolved at cluster level is uncovered in many of these near galaxies. PARSEC investigates the properties of nuclear dust filaments, lanes and molecular clouds as pre-sites for star formation.

    PARSEC - Theory: A physical insight of many of the PARSEC results is done via close collaboration with the Computational Astrophysics group, CAST, of the Munchen University Sternwarte, using numerical and magnetic-hydrodynamic simulations developped by this group.

    PARSEC - Instrumentation: PARSEC is also involved in the definition, development and construction of Adaptive Optics instrumentation for 8 -10 m telescopes. PARSEC instrumentation team is building the first Adpative Optics Integral Field Spectrograph and Imaging Camera, FRIDA, for GTC 10 m teelcope. 

    PARSEC - Outreach: PARSEC is involved in the science and outreach "Vanishing and Appearing Sources during a Century of Observations (VASCO)" project. VASCO searches for vanishing stars, unusual astrophysical transients and extra-terrestrial intelligence. As such, it is a platform for interacting with the general public. VASCO has strong visibility in the media outets via its associated citizen science project. 

    Principal investigator

    Related publications

    • A geometric distance to the supermassive black Hole of NGC 3783

      The angular size of the broad line region (BLR) of the nearby active galactic nucleus NGC 3783 has been spatially resolved by recent observations with VLTI/GRAVITY. A reverberation mapping (RM) campaign has also recently obtained high quality light curves and measured the linear size of the BLR in a way that is complementary to the GRAVITY

      Gravity Collaboration et al.

      Advertised on:

      10
      2021
    • The nuclear stellar disc of the Milky Way: A dynamically cool and metal-rich component possibly formed from the central molecular zone

      Context. The nuclear stellar disc (NSD) is, together with the nuclear star cluster (NSC) and the central massive black hole, one of the main components in the central parts of our Milky Way. However, until recently, only a few studies of the stellar content of the NSD have been obtained owing to extreme extinction and stellar crowding. Aims: We

      Schultheis, M. et al.

      Advertised on:

      6
      2021
    • Dust in the central parsecs of unobscured AGN: more challenges to the torus

      A parsec-scale dusty torus is thought to be the cause of active galactic nuclei (AGN) dichotomy in the 1/2 types, narrow/broad emission lines. In a previous work, on the basis of parsec-scale resolution infrared/optical dust maps, it was found that dust filaments, few parsecs wide and several hundred parsecs long, were ubiquitous features crossing

      Prieto, M. Almudena et al.

      Advertised on:

      9
      2021
    • A KMOS survey of the nuclear disk of the Milky Way. I. Survey design and metallicities

      Context. In the central few degrees of the bulge of the Milky Way there is a flattened structure of gas, dust, and stars, known as the central molecular zone, that is similar to nuclear disks in other galaxies. As a result of extreme foreground extinction, we possess only sparse information about the (mostly old) stellar population of the nuclear

      Fritz, T. K. et al.

      Advertised on:

      5
      2021
    • Raining in MKW 3 s: A Chandra-MUSE Analysis of X-Ray Cold Filaments around 3CR 318.1

      We present the analysis of X-ray and optical observations of gas filaments observed in the radio source 3CR 318.1, associated with NGC 5920, the brightest cluster galaxy (BCG) of MKW 3 s, a nearby cool core galaxy cluster. This work is one of the first X-ray and optical analyses of filaments in cool core clusters carried out using MUSE observations

      Jimenez-Gallardo, A. et al.

      Advertised on:

      5
      2021
    • The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region

      Using VLTI/GRAVITY and SINFONI data, we investigate the subparsec gas and dust structure around the nearby type 1 active galactic nucleus (AGN) hosted by NGC 3783. The K-band coverage of GRAVITY uniquely allows simultaneous analysis of the size and kinematics of the broad line region (BLR), the size and structure of the near-infrared(near-IR)

      Gravity Collaboration et al.

      Advertised on:

      4
      2021
    • Extended X-Ray Emission around FR II Radio Galaxies: Hot Spots, Lobes, and Galaxy Clusters

      We present a systematic analysis of the extended X-ray emission discovered around 35 FR II radio galaxies from the revised Third Cambridge Catalog (3CR) Chandra Snapshot Survey with redshifts between 0.05 and 0.9. We aimed to (i) test for the presence of extended X-ray emission around FR II radio galaxies, (ii) investigate whether the extended

      Jimenez-Gallardo, A. et al.

      Advertised on:

      2
      2021
    • Coronal-line forest active galactic nuclei - I. Physical properties of the emission-line regions

      Coronal-line forest (CLiF) active galactic nuclei (AGNs) are characterized by strong high-ionization lines, which contrasts with what is found in most AGNs. Here, we carry out a multiwavelength analysis aimed at understanding the physical processes in the narrow-line region (NLR) of these objects, and at discovering whether they are indeed a

      Cerqueira-Campos, F. C. et al.

      Advertised on:

      1
      2021
    • The spatially resolved broad line region of IRAS 09149-6206

      We present new near-infrared VLTI/GRAVITY interferometric spectra that spatially resolve the broad Brγ emission line in the nucleus of the active galaxy IRAS 09149-6206. We use these data to measure the size of the broad line region (BLR) and estimate the mass of the central black hole. Using an improved phase calibration method that reduces the

      Gravity Collaboration et al.

      Advertised on:

      11
      2020
    • Completing the 3CR Chandra Snapshot Survey: Extragalactic Radio Sources at High Redshift

      We present the analysis of nine radio sources belonging to the Third Cambridge Revised catalog (3CR) observed with Chandra during Cycle 20 in the redshift range between 1.5 and 2.5. This study completes the 3CR Chandra Snapshot Survey thus guaranteeing the X-ray coverage of all 3CR sources identified to date. This sample lists two compact steep

      Jimenez-Gallardo, A. et al.

      Advertised on:

      9
      2020
    • Low optical polarization at the core of the optically thin jet of M87

      We study the optical linear and circular polarization in the optically thin regime of the core and jet of M87. Observations were acquired two days before the Event Horizon Telescope (EHT) campaign in early 2017 April. A high degree (∼20 per cent) of linear polarization (Plin) is detected in the bright jet knots resolved at $\sim 10\,\mathrm{ to}\

      Fresco, A. Y. et al.

      Advertised on:

      6
      2020
    • Examining supernova events in Type 1 active galactic nuclei

      A statistical study of intermediate Palomar Transient Factory supernovae (SNe) in Type 1 active galactic nuclei (AGNs) has shown a major deficit of supernovae around Type 1 AGN host galaxies, with respect to Type 2 AGN hosts. The aim of this work is to test whether there is any preference for Type 1 AGNs to host SN of a specific kind. Through the

      Villarroel, Beatriz et al.

      Advertised on:

      5
      2020
    • Particle acceleration in low-power hotspots: modelling the broad-band spectral energy distribution

      The acceleration and radiative processes active in low-power radio hotspots are investigated by means of new deep near-infrared (NIR) and optical Very Large Telescope (VLT) observations, complemented with archival, high-sensitivity VLT, radio Very Large Array (VLA), and X-ray Chandra data. For the three studied radio galaxies (3C 105, 3C 195, and

      Migliori, G. et al.

      Advertised on:

      5
      2020
    • On the origin of magnetic driven winds and the structure of the galactic dynamo in isolated galaxies

      We investigate the build-up of the galactic dynamo and subsequently the origin of a magnetic driven outflow. We use a set-up of an isolated disc galaxy with a realistic circum-galactic medium (CGM). We find good agreement of the galactic dynamo with theoretical and observational predictions from the radial and toroidal components of the magnetic

      Steinwandel, Ulrich P. et al.

      Advertised on:

      3
      2020
    • Jansky VLA observations of synchrotron emitting optical hotspots of 3C 227 and 3C 445 radio galaxies

      We report results on deep Jansky Very Large Array (VLA) A-configuration observations at 22 GHz of the hotspots of the radio galaxies 3C 227 and 3C 445. Synchrotron emission in the optical on scales up to a few kpc was reported for the four hotspots. Our VLA observations point out the presence of unresolved regions with upper limit to their linear

      Orienti, M. et al.

      Advertised on:

      3
      2020
    • The resolved size and structure of hot dust in the immediate vicinity of AGN

      We use VLTI/GRAVITY near-infrared interferometry measurements of eight bright type 1 AGN to study the size and structure of hot dust that is heated by the central engine. We partially resolve each source, and report Gaussian full width at half-maximum sizes in the range 0.3-0.8 mas. In all but one object, we find no evidence for significant

      Gravity Collaboration et al.

      Advertised on:

      3
      2020
    • An image of the dust sublimation region in the nucleus of NGC 1068

      We present near-infrared interferometric data on the Seyfert 2 galaxy NGC 1068, obtained with the GRAVITY instrument on the European Southern Observatory Very Large Telescope Interferometer. The extensive baseline coverage from 5 to 60 Mλ allowed us to reconstruct a continuum image of the nucleus with an unrivaled 0.2 pc resolution in the K-band

      Gravity Collaboration et al.

      Advertised on:

      2
      2020
    • The Vanishing and Appearing Sources during a Century of Observations Project. I. USNO Objects Missing in Modern Sky Surveys and Follow-up Observations of a “Missing Star”

      In this paper we report the current status of a new research program. The primary goal of the “Vanishing and Appearing Sources during a Century of Observations” project is to search for vanishing and appearing sources using existing survey data to find examples of exceptional astrophysical transients. The implications of finding such objects extend

      Villarroel, B. et al.

      Advertised on:

      1
      2020
    • COMP2CAT: hunting compact double radio sources in the local Universe

      We present a catalog of compact double radio galaxies (hereafter COMP2CAT) listing 43 edge-brightened radio sources whose projected linear size does not exceed 60 kpc, the typical size of their host galaxies. This is the fifth in a series of radio source catalogs recently created, namely: FRICAT, FRIICAT, FR0CAT, and WATCAT, each of which focuses

      Jimenez-Gallardo, A. et al.

      Advertised on:

      7
      2019
    • Software architecture of the high-level control of FRIDA

      FRIDA (inFRared Imager and Dissector for Adaptive optics) is a near-infrared integral-field spectrograph operating at the wavelength range of 0.9 to 2.5 μm for use at the Nasmyth B platform of the Gran Telescopio de Canarias (GTC). FRIDA is a collaborative project led by the Instituto de Astronomía Universidad Nacional Autónoma de México (IA-UNAM

      Guzmán Alvaréz, C. et al.

      Advertised on:

      1
      2019

    Related talks

    No related talks were found.

    Related conferences

    No related conferences were found.