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Astrophysics with GW detections, 6-7 September 2019

6–7 Sept 2019
Europe/Warsaw timezone

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Contribution List

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  1. 12. Welcome
    Tomasz Bulik (Obserwatorium Astronomiczne UW)
    06/09/2019, 09:25
  2. 13. Observations of binaries in GW
    Thomas Dent (IGFAE, University of Santiago de Compostela)
    06/09/2019, 09:30
  3. 14. Uncovering the mass gap
    Bangalore Sathyaprakash (The Pennsylvania State University)
    06/09/2019, 09:50
  4. 15. The origin of effective spins, high black hole masses, and O1/O2 rates in LIGO/VIRGO binary black hole mergers
    Prof. Krzysztof Belczynski (Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland)
    06/09/2019, 10:30
  5. 19. The origin of binary black hole mergers
    Prof. Tsvi Piran
    06/09/2019, 11:30
  6. 18. Precision physics with extreme mass ratio inspirals
    Christopher Berry (Northwestern University)
    06/09/2019, 12:10
  7. 20. The common envelope channel as test bed for massive star evolution
    Mr Jakub Klencki (Radboud University Nijmegen)
    06/09/2019, 12:50
  8. 16. Formation of compact object binaries in globular clusters
    Mirek Giersz (Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences)
    06/09/2019, 14:10
  9. 17. Properties of merging/colliding black holes originating in globular clusters - the impact of IMBH
    Dorota Rosinska (University of Warsaw)
    06/09/2019, 14:50
  10. 32. Implications of binary coalescence events for the stochastic background
    Nelson CHRISTENSEN (Artemis, Observatoire de la Cote d'Azur)
    06/09/2019, 15:05
  11. 22. Chemical evolution of the Universe and the properties of merging double compact objects
    martyna chruslinska
    06/09/2019, 15:45
  12. 23. Cosmology with GW detections
    Archisman Ghosh (Leiden University)
    06/09/2019, 16:35
  13. 24. Synthetic catalog of black holes in the Milky Way
    Aleksandra Olejak (OA UW)
    06/09/2019, 17:15
  14. 25. Could gravitational lensing impact the observed BBH population?
    David Keitel (University of Portsmouth)
    06/09/2019, 17:35
  15. 21. Prospects and challenges for multi-messenger astronomy
    Marica Branchesi (Gran Sasso Science Institute/INFN)
    07/09/2019, 09:35
  16. 27. Host galaxies of merging compact objects
    Dr Maria Celeste Artale (University of Innsbruck)
    07/09/2019, 10:15
  17. 28. Time-domain model for kiloHertz gravitational-waveforms from neutron star merger remnants
    Matteo Breschi (FSU Jena)
    07/09/2019, 10:35
  18. 30. Neutron star mergers and the high density equation of state
    Andreas Bauswein
    07/09/2019, 11:30
  19. 29. Connecting nuclear physics and multi-messenger astrophysics with neutron stars
    Morgane Fortin (CAMK, PAN)
    07/09/2019, 12:10
  20. 36. Population of neutron stars and its observability in GW
    Marek Cieślar (Nicolaus Copernicus Astronomical Center)
    07/09/2019, 12:40
  21. 26. Dynamically driven mergers of black holes in dense stellar environments
    Abbas Askar
    07/09/2019, 14:00
  22. 33. Chirp mass - distance distributions of the sources of gravitational waves
    Maciej Ossowski (Faculty of Physics at the University of Warsaw)
    07/09/2019, 14:40
  23. 34. The results and implications of search for gravitational waves emitted by core collapse supernovae
    Marek Szczepanczyk (University of Florida)
    07/09/2019, 14:50
  24. 35. Computing the spin tilt angles at formation from gravitational wave observations of binary black holes
    Nathan Johnson-McDaniel (DAMTP, University of Cambridge)
    07/09/2019, 15:10
  25. 5. Chemical evolution of the Universe and the properties of merging double compact objects
    martyna chruslinska
    Oral

    Gravitational wave observations begin to probe the properties of the populations of merging double compact objects, providing constraints that can be confronted with theoretical models and help to validate the assumptions about the evolution of their progenitor systems.

    The formation and characteristics of various transients of stellar origin, in particular double BH mergers, are highly...

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  26. 9. Chirp mass - distance distributions of the sources of the gravitational waves
    Maciej Ossowski (Faculty of Physics at the University of Warsaw)
    Oral

    The detection of gravitational waves emitted by binary black holes raises a question of the binaries’ origin. There are several models present in the literature involving binary evolution in both field and clusters. Here I aim to compare predictions of these models with the observations.
    Using the Bayesian inference I compare the models with the up-to-date detections using the distributions of...

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  27. 11. Computing the spin tilt angles at formation from gravitational wave observations of binary black holes
    Dr Nathan Johnson-McDaniel (DAMTP, University of Cambridge)
    Oral

    The angles between the spins of binary black holes and the binary's orbital angular momentum (often known as tilt angles) give important information about the evolution of the binary. For instance, for the isolated binary formation channel, the tilt angles when the binary is formed give information about supernova kicks. One can obtain the tilt angles at the binary's formation computationally...

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  28. 8. Could gravitational lensing impact the observed BBH population?
    Dr David Keitel (University of Portsmouth)
    Oral

    Just like visible light, gravitational waves can be lensed by heavy masses between source and observer. Hence, a fraction of the observed distant binary black hole mergers could be magnified by lensing, some sources may have produced multiple observable images, and individual waveforms may be affected by wave optics and microlensing effects.
    The predicted rate of such lensing is small for the...

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  29. 1. Detectability of continuous gravitational waves from isolated neutron stars in the Milky Way: the population synthesis approach
    Marek Cieślar (Nicolaus Copernicus Astronomical Center)
    Oral

    We investigate the visibility of single Galactic pulsars in the gravitational waves. We integrate the signal for a period of one year, a comparable length to the current O3 LIGO/Virgo observing run, by computing the interferometr response and compering it to the design sensitives of LIGO and Virgo detectors. With an assumption of single radio pulsar population model, classical rotating...

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  30. 37. Dynamically driven mergers of black holes in dense stellar environments
    Abbas Askar
  31. 6. Synthetic catalog of black holes in the Milky Way
    Aleksandra Olejak (OA UW)
    Oral

    We present a synthetic catalog of Galactic black holes (BHs) divided into disk, bulge and halo. To calculate evolution of single and binary stars we used updated population synthesis code StarTrack and new model of star formation history and chemical evolution of Galactic components. At the current moment Milky Way contains about 1.6×10^8 single BHs with average mass of about 13 M_sun and...

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  32. 10. The common envelope channel as test-bed for massive star evolution
    Mr Jakub Klencki (Radboud University Nijmegen)
    Oral

    The evolution of massive stars remains highly uncertain due to a number of poorly constrained factors such as internal mixing, angular momentum transport, mass loss rates, or effects of binarity. Detections of gravitational waves from BH binary mergers offer a unique opportunity to probe the evolution of a particular subset of massive stars: those that have (most likely) initiated and survived...

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  33. 7. The connection between ultra-luminous X-ray sources and double compact objects
    Mr Samaresh Mondal (Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland)
    Oral

    We explore the different formation channels of merging double compact objects (DCOs: BH-BH/BH-NS/NS-NS) that went through an ULX phase (X-ray sources with luminosity exceeding the Eddington luminosity of a 10 $M_{\odot}$ black hole). There are two major formation channels which can naturally explain the formation of DCO systems: isolated binary evolution and dynamical evolution inside dense...

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  34. 31. The connection between ultra-luminous X-ray sources and double compact objects
    Samaresh Mondal (CAMK)
  35. 4. The host galaxies of merging compact objects
    Dr Maria Celeste Artale (University of Innsbruck)
    Oral

    In the new era of gravitational-wave astronomy, understanding the properties of the host galaxies of merging compact objects is crucial.
    I will present a method to explore the galaxies where merging compact objects form and merge, by combining galaxy catalogs from cosmological simulations together with state of the art population synthesis models.
    I will show that the merger rate per galaxy...

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  36. 3. The origin of low effective spins, high black hole masses, and O1/O2 rates in LIGO/Virgo binary black hole mergers
    Krzysztof Belczynski (Copernicus Center, Polish Academy of Sciences)
    Oral

    All of the ten LIGO/Virgo BH-BH merger O1/O2 detections have near zero effective spins. One explanation makes BH spin magnitudes small.

    We test this hypothesis with the classical isolated binary evolution scenario. We test three models of angular momentum transport in massive stars: mildly efficient transport by meridional currents (as employed in the Geneva code), efficient transport by...

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  37. 2. Time-domain model for kiloHertz gravitational-waveforms from neutron star merger remnants
    Matteo Breschi (FSU Jena)
    Oral

    The remnant star of a neutron star merger is an anticipated loud source of kiloHertz gravitational waves that conveys unique information on the equation of state of hot matter at extreme densities. Observations of such signals are hampered by the photon shot noise of ground-based interferometers and a challenge for gravitational-wave astronomy. We develop an analytical time-domain waveform...

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