Journal Club


"Morasko Meteorite"

K. Bąkowska (NCAC, Warsaw)

based on Stankowski "Morasko Meteorite" (UAM, 2009), Karwowski et al. (Meteorites, Vol. 1, No. 1, 2011, 21-28, PDF) and recent findings


"Astrophysical Outbursts"

Christopher Fryer (LANL)

With the number of fast-response telescopes dramatically increasing, the era of astrophysical transients has now begun. But much work remains on the theory side to be able to use observations of these transients to learn about astrophysical outbursts. I will review the difficulties in developing detailed models of astrophysical transients as well as the methods by which we hope to overcome these difficulties.


"Broad Absorption Line Quasar J1020+4320: Recently Restarted Jet Activity?"

K. Hryniewicz (NCAC, Warsaw)

based on Doi et al. 2013 (arXiv:1301.4759)


"The most interesting astronomical results in 2012"

S. Bajtlik (NCAC, Warsaw)


"Fe Kα line reverberation around black holes in AGN"

P. Życki (NCAC, Warsaw)

based on: Zoghbi et al. (arXiv:1302.1761)


"Low-Mass X-ray Binaries in Globular Clusters: Puzzles and Solutions"

A. Hypki (NCAC, Warsaw)

based on Ivanova (2013; arXiv:1301.2203)

"Planetary Nebulae Luminosity Function - a method for independent measurements of extragalactic distances"

K. Suberlak

based on i.a. Robin Ciardullo , "The Planetary Nebula Luminosity Function" (2006; on-line article)


"BK Lyncis: The Oldest Old Nova?... And a Bellwether for Cataclysmic-Variable Evolution"

M. Otulakowska-Hypka (NCAC, Warsaw)

based on Patterson et al. (2013; arXiv:1212.5836)


"Gravitational Wave Memory from Gamma Ray Bursts' Jets"

M. Bejger (NCAC, Warsaw)

based on Birnholtz & Piran, arXiv:1302.5713

"News on Andromeda"

E. Łokas (NCAC, Warsaw)

based on van der Marel et al. (2012, ApJ, 753, 9) and other papers


"PeV neutrinos from intergalactic interactions of cosmic rays emitted by active galactic nuclei"

M. Janiak (NCAC, Warsaw)

based on Kalashev, Kusenko and Essey, arXiv:1303.0300


"The discovery of a population of Gamma-ray novae"

A. Barnacka (NCAC, Warsaw)

based on: Fermi-LAT Collaboration arXiv:1008.3912, ATel#4224 and ATel#4284;

"ASTROMEV: a proposed astronomical satellite observing in the MeV range"

A. Zdziarski (NCAC, Warsaw)


"Core collapse in a kitchen sink and other supernova stories"

M. Różyczka (NCAC, Warsaw)

based on: "Shallow Water Analogue of the Standing Accretion Shock Instability: Experimental Demonstration and a Two-Dimensional Model" by Foglizzo et al. 2012, Phys. Rev. Let. 108, 051103; "A Peculiar Supernova from a He-rich Progenitor in a Brightest Cluster Galaxy Environment" by Sanders N.E. et al.; arXiv1303.1818; "Evidence for Two Distinct Populations of Type Ia Supernovae" by Wang et al. arXiv1303.2601

"The youngest galactic black hole?"

J. Ziółkowski (NCAC, Warsaw)

based on Lopez et al. (arXiv:1301.0618)


"The Formation and Evolution of Wind-Capture Disks In Binary Systems"

A. Manousakis (NCAC, Warsaw)

based on Huarte-Espinosa et al. (arXiv:1211.1672)

"Black holes in globular clusters: theory, simulations and observations"

M. Giersz (NCAC, Warsaw)

based on: Sippel & Hurley, "Multiple stellar-mass black holes in globular clusters: theoretical confirmation", MNRAS, 430, L30; Morscher, Umbreit, Farr and Rasio, "Retention of stellar-mass black holes in globular clusters", ApJL, 763, L15; Lutzgendorf et al., "Intermediate-mass black holes in globular clusters", 2013, arXiv:1301.2998.


"Delta a photometry in globular clusters"

E. Paunzen (Masaryk University, Brno, Czech Republic)


"A Massive Pulsar in a Compact Relativistic Binary"

L. Zdunik (NCAC, Warsaw)

based on Antoniadis et al. 2013, Science, Vol. 340, no. 6131


"The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) and perspectives for pulsar astronomy after 2016"

P. Haensel (NCAC, Warsaw)

based on: Di Li et al. arXiv:1210.5785

"Multiple stellar populations and black holes in globular clusters"

J. Kałużny (NCAC, Warsaw)

based on arXiv:1304.4176, arXiv:1304.7156, arXiv:1301.7044 and arXiv:1303.5178


"What do black holes look like if GR is wrong?"

F. Vincent (NCAC, Warsaw)

"SOAR Adaptive Optics Observations of the Globular Cluster NGC6496"

W. Narloch (NCAC, Warsaw)

based on Fraga, Kunder & Tokovinin arXiv:1304.4880


"A rapidly spinning supermassive black hole at the centre of NGC 1365"

P. Bagińska (NCAC, Warsaw)

based on Risaliti et al. (2013), Nature, 494, 449

"The unnovae"

W. Kluźniak (NCAC, Warsaw)

based on Piro (2013, arXiv:1304.1539)


"Star observations planning and modelling using STK tool"

E. Zocłońska (NCAC, Warsaw)

"Gödel-type universes and chronology protection in Horava-Lifshitz gravity"

M. Abramowicz (NCAC, Warsaw)

based on Fonseca-Neto et al. (2013, arXiv:1304.4675)


"PF191012 Myszyniec - the highest Orionid meteor ever recorded"

A. Olech (NCAC, Warsaw)

"Nustar Discovery of Transient Magnetar near Sagittarius A*"

Tek Prasad Adhikari

based on Kaya Mori et al. (arXiv:1305.1945v1)


"The physics of AGN feedback: what is inside the "grid"?"

D. Proga (Univ. of Nevada)


"Giant Lobes in Radio and Starforming Galaxies As Sources of High-Energy Emission and Particles"

Ł. Stawarz (Institute of Space and Astronautical Science JAXA)

In this talk I will review the most recent observations of giant lobes in a few nearby radio galaxies such as Centaurus A or Centaurus B, as well as in starforming systems such as Circinus or Milky Way ("Fermi Bubbles"), at X-ray and gamma-ray frequencies. I will discuss the pressure balance within these structures, new evidence for a thermal gas mixed with the relativistic plasma within the lobes, and a need for a continuous acceleration of gamma-ray emitting electrons. I will argue that the structure of the extended lobes in all these systems is highly inhomogeneous and non-uniform, with magnetic reconnection and turbulent acceleration processes continuously converting magnetic energy to the internal energy of the plasma particles, leading to possibly significant spatial and temporal variations in the plasma beta parameter around the volume-averaged equilibrium condition beta ~1.


"Establishing a relation between mass and spin of stellar mass black holes"

B. Mishra (NCAC, Warsaw)

based on Indrani Banerjee, Banibrata Mukhopadhyay (PRL 2013 vol. 111, Issue 6, id. 061101)


"Swings between rotation and accretion power in a binary millisecond pulsar"

A. Manousakis (NCAC, Warsaw)

Based on Papitto et al. Nature, 2013, 501, 7468


"Orbital, Superhump, and Superorbital Periods in the Cataclysmic Variables AQ Mensae and IM Eridani"

Karolina Bąkowska (NCAC, Warsaw)

based on Armstrong et al. (arXiv:1307.5479)


"How massive can a stellar-origin black hole get?"

K. Belczyński (OA UW)

It is not known what is the maximum mass of a stellar origin black hole. Not long ago 10 Msun was commonly adopted as a BH mass limit. Now observations have demonstrated that a BH can reach at least 30 Msun. Can black holes reach mass above 100 Msun? I will discuss this issue along with several related physical processes to arrive at an observational prediction that will verify any potential answer to this question.


"Starry sky above me..."

Radek Smolec (NCAC, Warsaw)

Based on: Dacke et al. Current Biology 2013, vol. 23, p. 298 (IgNoble'2013 award)


"Dynamical models of the Milky Way"

Ronaldo Vieira (NCAC, Warsaw)

Based on MNRAS 426, 1328 (2012).


"Quasars and their emission lines as cosmological probes"

Justyna Modzelewska (NCAC, Warsaw)

Based on Marziani & Sulentic, arXiv:1310.3143

"Shell galaxies: kinematical signature of shells, satellite galaxy disruption and dynamical friction"

Ivana Ebrova (Czech Academy of Sciences, Prague)

Stellar shells observed in many giant elliptical and lenticular as well as a few spiral and dwarf galaxies presumably result from radial minor mergers of galaxies. We show that the line-of-sight velocity distribution of the shells has a quadruple-peaked shape. We found simple analytical expressions that connect the positions of the four peaks of the line profile with the mass distribution of the galaxy, namely, the circular velocity at the given shell radius and the propagation velocity of the shell. The analytical expressions were applied to a test-particle simulation of a radial minor merger, and the potential of the simulated host galaxy was successfully recovered. Shell kinematics can thus become an independent tool to determine the content and distribution of dark matter in shell galaxies up to ~100 kpc from the center of the host galaxy. Moreover we investigate the dynamical friction and gradual disruption of the cannibalized galaxy during the shell formation in the framework of a simulation with test particles. The coupling of both effects can considerably redistribute positions and luminosities of shells. Neglecting them can lead to significant errors in attempts to date the merger in observed shell galaxies.


"Evidence for A Parsec-scale Jet from The Galactic Center Black Hole"

Frederic Vincent (NCAC, Warsaw)

Based on Li et al. 2013, arXiV:1310.0146


"A new equilibrium torus solution and GRMHD initial conditions"

Bhupendra Mishra (NCAC, Warsaw)

Based on: Penna et al., A&A, 559, 116 (2013)


"Stellar Spin-Orbit Misalignment in a Multiplanet System"

Przemek Walczak (CAMK, Warsaw)

based on: Daniel Huber, Joshua A. Carter, Mauro Barbieri, at al., 2013, arXiv:1310.4503v2