About me

I’m an astrophysicist at University of Oulu. The focus of my research to date has been on the study of the physics of accretion disсs and the evolution of close interacting binary stars such as cataclysmic variables (CVs) and low mass X-ray binaries (LMXBs). In my research, I have mostly been basing on observations, but also I am interested in the observational techniques, methodology development and astrophysical modelling. My tools are spectroscopy, high-speed photometry, and time series analysis techniques. In addition, though I have previously worked mostly in the optical, I have also recently started in a new direction, in which I try to tackle similar problems associated with the interpretation of X-ray, UV and infrared data.

Research Interests

  • Interacting binary stars (Cataclysmic variables and Low Mass X-ray Binaries)
  • Accretion discs
  • Time series analysis
  • Image processing, data analysis
  • Computational astrophysics

 

Recent Research Highlights

February 15, 2017: A study of the highly-evolved post period-minimum dwarf nova SSS J122221.7−311525.

November 2, 2014: A low-mass black hole in SWIFT J1753.5-0127.

 

Key/recent publications

  • Neustroev V., et al.: “Superhumps linked to X-ray emission. The superoutbursts of SSS J122221.7-311525 and GW Lib”, 2018, A&A, V.611, A13 (12 pages)
  • Wakamatsu Y., …, Neustroev V., et al.: “ASASSN-16eg: New candidate for a long-period WZ Sge-type dwarf nova”, 2017, PASJ, V. 69, id.89 (9 pages)
  • Hernandez M. S., Zharikov S., Neustroev V., Tovmassian G.: “Structure of accretion flows in nova-like cataclysmic variables: RW Sextantis and 1RXS J064434.5+334451”, 2017, MNRAS, V.470, pp. 1960-1970 (11 pages)
  • Neustroev V., et al.: “The remarkable outburst of the highly evolved post-period-minimum dwarf nova SSS J122221.7−311525”, 2017, MNRAS, V.467, pp. 597-618 (22 pages)
  • Namekata K., …, Neustroev V., et al.: “Superoutburst of WZ Sge-type dwarf nova below the period minimum: ASASSN-15po”, 2017, PASJ, V. 69, id.2 (9 pages)
  • Neustroev V., Zharikov S., Borisov N.: “Voracious vortexes in cataclysmic variables – A multi-epoch tomographic study of HT Cassiopeia”, 2016, A&A, V. 586, A10 (15 pages) [arXiv:1506.04753]
  • Neustroev V., Veledina A., Poutanen J., Zharikov S., Tsygankov S., Sjoberg G., Kajava J. J. E.: “Spectroscopic evidence for a low-mass black hole in SWIFT J1753.5-0127”, 2014, MNRAS, V. 445, pp. 2424-2439 [arXiv:1409.4423]
  • Neustroev V.V., Tovmassian G.H., Zharikov S.V., Sjoberg G.: “Steps towards a solution of the FS Aurigae puzzle – II. Confirmation of the intermediate polar status”, 2013, MNRAS, V. 432, pp. 2596-2614
  • Acharya B.S., Actis M., Aghajani T., …, Neustroev V., et al.: “Introducing the CTA concept”, 2013, Astroparticle Physics, V. 43, pp. 3-18
  • Feroci, M., …, Neustroev V., et al.: “The Large Observatory for X-ray Timing (LOFT)”, 2012, Experimental Astronomy, V. 34, pp. 415-444
  • Neustroev V., Suleimanov V., et al.: “Dark spot, Spiral waves and the SW Sex behaviour: it is all about UX Ursae Majoris”, 2011, MNRAS, V. 410, pp. 963-977
  • Aviles, A., Zharikov, S., …, Neustroev V., et al.: “SDSS J123813.73 – 033933.0: A Cataclysmic Variable Evolved Beyond the Period Minimum”, 2010, ApJ, V. 711, pp. 389-398.
  • Zharikov S.V., Tovmassian G.H., Neustroev V., et al.: “Cyclic brightening in the short-period WZ Sge-type cataclysmic variable SDSS J080434.20+510349.2”, 2008, A&A, V. 486, pp. 505-509.
  • Tovmassian G.H., Zharikov S.V., Neustroev V.V., Evidence of Precession of the White Dwarf in Cataclysmic Variables, 2007, ApJ, 655, 466
  • Golden A., …, Neustroev V., et al.: “High speed phase-resolved 2-d UBV photometry of the Crab pulsar”, 2000, A&A, V.363, pp.617-628
  • Shearer A., …, Neustroev V., et al.: “Possible pulsed optical emission from Geminga”, 1998, A&A., V.335, L21-L24
  • Shearer A., …, Neustroev V., et al.: “Pulsed Optical Emission from PSR 0656+14”, 1997, Aph.J., V. 487, L181-L184

 

Key/recent MAGIC publications

  • Acciari V.A., …, Neustroev V., et al. (the MAGIC Collaboration): “Deep observations of the globular cluster M15 with the MAGIC telescopes”, 2019, MNRAS, 484, 2876
  • Acciari V.A., …, Neustroev V., et al. (the MAGIC Collaboration): “Discovery of TeV gamma-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC”, 2019, MNRAS, 483, 4578
  • Ahnen M.L., …, Neustroev V., et al. (the MAGIC Collaboration): “MAGIC and Fermi-LAT gamma-ray results on unassociated HAWC sources”, 2019, MNRAS,
  • IceCube Collaboration, Aartsen M.~G., Ackermann M., et al.: “Multimessenger observations of a flaring blazar coincident with high-energy neutrino
    IceCube-170922A”, 2018, Science, 361, eaat1378
  • Ansoldi S., …, Neustroev V., et al. (the MAGIC Collaboration): “The Blazar TXS 0506+056 Associated with a High-energy Neutrino: Insights into Extragalactic Jets and Cosmic-Ray Acceleration”, 2018, ApJ, 863, L10

Dear colleagues,

 

The Astronomy research unit of the University of Oulu is a small but scientifically active research group consisting of 4 senior researchers (1 permanent, 3 fixed-term) and externally funded postdocs (3) and PhD students (4). According to all measures, we are proud to count ourselves among the best research units of our university. However, despite our success in attracting external funding (currently in excess of 300k€ per year), a strong publication track record (99 papers in 2016-2018, including 4 in Science and Nature) and a well-developed teaching curriculum, the Astronomy research unit is now in serious danger.

 

Without any preliminary consultations with the staff or the unit leader the university board has decided to start a process that aims at terminating the main subject status of Astronomy, and converting two of the current astronomy researcher positions to teaching positions in Physics. This would be a serious blow for us, but it is in line with other actions taken previously by the faculty of science against the Astronomy unit, like a series of budget cuts, and the denial by the dean to approve our suggestions for continuation contracts of key personnel of the unit. The loss of the main subject status may sound like a harmless thing. But it is not: the process (called YT-negotiations), initiated by the dean of the faculty of science, is usually used by employers in Finland to terminate work contracts “efficiently” in a situation of economic difficulties. It is a heavy cannon, and it is surprising that this heavy measure is used for this purpose, in particular since the Astronomy unit is producing positive net income to the university, via the bonus university receives from the Ministry of Education and Culture based on the unit’s research output. We are afraid that the process will permit the faculty to take away positions from our unit. This will endanger the unit as a whole, because our budget is directly related to the research output, and a reduction in research staff would lead to a downward spiral and eventual termination of our research unit within a few forthcoming years.

 

Read the full statement here