Sixteenth Marcel Grossmann Meeting

Session

Multichannel Studies of Nonstationary Relativistic Stars

BN3

6 Jul 2021, 09:30

Conveners

Multichannel Studies of Nonstationary Relativistic Stars: Block 1

• Vladimir Lipunov (Lomonosov Moscow State University, SAI, Physics Department)

Description

This session will focus on multimessenger observations and predictions of catastrophic events near relativistic stars: neutron stars, stellar and supermassive black holes. We will talk about new multichannel operational observations and models in which new sciences are born - gravitational-wave astronomy (mergers of neutron stars and black holes), extragalactic neutrino astronomy (blazars and high-energy neutrinos), transient radio astronomy (Magnetars, Fast Radio Bursts, Soft Gamma Repeaters) and so on.

Presentation materials

YouTube Link - July 6

361. Multifrequency Behaviour of High Mass X-ray Binary Systems

Franco Giovannelli (INAF-Istituto di Astrofisica e Planetologia Spaziali)

06/07/2021, 09:30

Multichannel studies of nonstationary relativistic stars

Invited talk in the parallel session

In this talk the zoo of the High Mass X-ray Binary
Systems (HMXBs) is presented. Among these I will discuss the X-ray/Be systems and
in particular A0535 + 26/HDE245770. Through the multifrequency
experimental data obtained in long observation campaigns it was
possible to develop a particular model for the aforementioned system
and then a general one that explains the delay between...

362. Three Stage Collapse From Prompt Multiwavelength Observations of GRB160625B

Prof. Vladimir Lipunov (Lomonosov Moscow State University, SAI, Physics Department)

06/07/2021, 09:50

Multichannel studies of nonstationary relativistic stars

Invited talk in the parallel session

We present the results of synchronous multiwave observations of the intrinsic gamma and optical radiation of the long GRB160625B gamma-ray burst by the MASTER Global Network, the Lomonosov Gamma-Observatory and the Konus-Wind gamma detector. We see traces of quasiperiodic optical pulsations of the intrinsic optical radiation on scales of several tens of seconds. We associate quasiperiodic...

423. Mergers, magnetars and multi-messengers

Stephen Smartt (Queen's University Belfast)

06/07/2021, 10:10

Multichannel studies of nonstationary relativistic stars

Invited talk in the parallel session

Wide-field optical sky surveys are discovering a remarkable diversity
in how stars merge, collapse and explode. The powering mechanism for
many of these requires a source beyond radioactivity, plausibly a
magnetic, rapidly spinning neutron star. The discovery of
the electromagnetic counterpart to a pair of merging neutron stars
and other rapid transients from merging binary systems...

363. Recent results on magnetar flares and their connections with gamma-ray bursts and fast radio bursts

Dr Dmitry Frederiks (Ioffe Institute of theoretical physics)

06/07/2021, 10:30

Multichannel studies of nonstationary relativistic stars

Invited talk in the parallel session

"2020 was a special year for magnetar studies. The first simultaneous detection
of an FRB-like radio burst from a Galactic magnetar and its high-energy counterpart
(FRB/SGR 200428) suggests that magnetars can produce FRBs.
Observations of the short γ-ray burst GRB 200415A, associated with a nearby galaxy
and with properties closely resembling the huge initial pulses of magnetar
giant...

360. GRB Observations on Cubsate Satellites in the "Universat-SOCRAT" Project

Prof. Sergey Svertilov (Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physcs)

06/07/2021, 10:50

Multichannel studies of nonstationary relativistic stars

Invited talk in the parallel session

Lomonosov Moscow State University Universat-SOCRAT program is aimed at using small satellites to monitor space threats
These satellites are equipped with instruments for space radiation monitoring, as well asprototypes of devices for observing transient phenomena in the Earth’s atmosphere.
In particular, two satellites are equipped with scintillation phosphich detectors that detect...

369. The role of the magnetic fields in GRB outflows

Dr Nuria Jordana-Mitjans (Department of Physics, University of Bath)

06/07/2021, 11:10

Multichannel studies of nonstationary relativistic stars

Talk in the parallel session

We report multicolor optical imaging and polarimetry observations of the afterglow of the first TeV-detected gamma-ray burst (GRB), GRB 190114C, using the RINGO3 and MASTER II polarimeters. Observations begin 31 s after the onset of the GRB and continue until ∼7000 s postburst. The light curves reveal a chromatic break at ∼400-500 s, with initial temporal decay α = 1.669 ± 0.013 flattening to...

370. MASTER optical observations of the blazar TXS0506+056 during the IC170922A

Mr Kirill Zhirkov (Lomonosov Moscow State University, SAI, Physics Department)

06/07/2021, 11:30

Multichannel studies of nonstationary relativistic stars

Talk in the parallel session

MASTER Global Robotic Network of Lomonosov Moscow State University is the network of 8 robotic optical telescopes
located all over the world. One of their goals is the search for optical counterparts to short-
living transients such as GRB, gravitational waves and high-energy neutrinos. It is helped by
the fast reaction time of the telescopes on such alerts and their fast slewing. On...