A5086814589- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Geophysics and Sensor Technology
- Geophysics and Gravity Measurements
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
Max Planck Institute for Extraterrestrial Physics
2024
Russian Foundation for Basic Research
2020-2022
Lomonosov Moscow State University
2019-2022
The eROSITA telescope array aboard the Spektrum Roentgen Gamma (SRG) satellite began surveying sky in December 2019, with aim of producing all-sky X-ray source lists and maps an unprecedented depth. Here we present catalogues both point-like extended sources using data acquired first six months survey operations (eRASS1; completed June 2020) over half whose proprietary rights lie German Consortium. We describe observation process, analysis pipelines, characteristics sources. With nearly 930...
Context. Extended gamma-ray TeV emission (TeV halos) has been detected around middle-aged pulsars. A proposed model to explain these halos is that electrons from a degree-wide pulsar wind nebula (PWN) get up-scattered by cosmic microwave background photons through inverse Compton processes. However, no X-ray faint diffuse PWNe have found pulsars in previous observations. Aims. We performed search for Geminga, PSR B0656+14, B0540+23, J0633+0632, and J0631+1036 using data the first four...
Detecting a supernova remnant (SNR) along the Galactic plane can be quite challenging. Any new detection reduces discrepancy between expected and known number of remnants. In this paper, we present results from large selection radio X-ray data that cover position G321.3-3.9. We identified G321.3-3.9 as SNR using collected by several surveys spanning frequency range 200 MHz to 2300 MHz. Stacked eROSITA four consecutive all-sky (eRASS:4) provide spectro-imaging information in energy band...
was first identified as a partial shell at radio frequencies few decades ago. Although it continued to be observed, no additional studies were undertaken until recently. In this paper we present results from large selection of and X-ray data that cover the position We confirmed new supernova remnant (SNR) using collected by several surveys, spanning frequency range 200 2300\,MHz. Stacked eROSITA four consecutive all-sky surveys (eRASS:4) provide spectro-imaging information in energy band...
Neutron stars can appear as sources of different nature. In this paper we address the observability a hypothetical class neutron stars—HOt and Fast Non-Accreting Rotators, HOFNARs. These objects are heated due to r-mode instability. With surface temperatures ∼106 K they expected be thermal soft X-ray emitters. We perform population synthesis modeling HOFNARs predict number potentially detectable in eROSITA all-sky survey. For obtain ∼500 above detection limit 0.01 cts s−1 ∼100 easier...
A four-year sky survey with the use of eROSITA telescope on board Spektr-RG observatory will provide best coverage in soft (0.5-2 keV) and standard (2-10 X-ray ranges, both terms sensitivity angular resolution. We have analysed possibility detecting various types isolated neutron stars eROSITA. Among already known objects, be able to detect more than 160 pulsars, 21 magnetars, 7 central compact all seven sources Magnificent Seven, two other during mission.
Recently, several accreting neutron stars (NSs) in X-ray binary systems inside supernova remnants have been discovered. They represent a puzzle for the standard magneto-rotational evolution of NSs, as their ages ($\lesssim 10^5$ years) are much shorter than expected duration Ejector and Propeller stages preceding onset wind accretion. To explain appearance such systems, we consider rotational NSs with early fallback accretion asymmetry forward/backward transitions between (so-called...
Context. Extended gamma-ray TeV emission (TeV halos) around middle-aged pulsars has been detected. A proposed model to explain these halos is that electrons from a degree-wide Pulsar Wind Nebula (PWN) get up-scattered by cosmic microwave background photons through inverse Compton processes. However, no X-ray faint diffuse PWNe have found in previous observations. Aims. We performed search for degree wide Geminga, PSR B0656+14, B0540+23, J0633+0632, and J0631+1036, using data the first four...
Coalescences of neutron stars and white dwarfs are relatively frequent phenomena, outnumbering other types compact object mergers (neutron black holes without involving dwarfs) altogether. Such event potentially can produce not only optical, but also an X-ray burst. Transient source CDF-S XT2 [1] be example this type events as suggested by [2]. In note we estimate the rate these transients in field view instruments on-board Spectrum-RG satellite. We demonstrate that during four years survey...
In recent years, accreting neutron stars (NSs) in X-ray binary systems supernova remnants have been discovered. They are a puzzle for the standard magneto-rotational evolution of NSs, as their age ($\lesssim 10^5$ years) is much less than expected duration preceding Ejector and Propeller stages. To explain such systems, we consider rotational NSs with fallback accretion asymmetry direct/backward transitions between It shown that at certain values initial period magnetic field, young star may...
A four-year sky survey with the use of eROSITA telescope on board Spektr-RG observatory will provide best coverage in soft (0.5-2 keV) and standard (2-10 X-ray ranges, both terms sensitivity angular resolution. We have analysed possibility detecting various types isolated neutron stars eROSITA. Among already known objects, be able to detect more than 160 pulsars, 21 magnetars, 7 central compact all seven sources Magnificent Seven, two other during mission.
Neutron stars can appear as sources of different nature. In this paper we address observability a hypothetical class neutron -- HOt and Fast Non Accreting Rotators, HOFNARs. These objects are heated due to the r-mode instability. With surface temperatures $\sim 10^6$~K they expected be thermal soft X-ray emitters. We perform population synthesis modeling HOFNARs predict number potentially detectable in eROSITA all-sky survey. For obtain 500$ above detection limit 0.01~cts~s$^{-1}$ 100$...