Investigation of the RCR catalog sources in the millimeter and submillimeter ranges based on the Planck mission data

Верходанов, О. В.; Majorova, E. K.; Желенкова, О. П.; Хабибуллина, М. Л.; Solovyov, D. I.; Parijskij, Yu. N.

doi:10.1134/s1990341315020030

Cited by 17 publications

(8 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the faint objects, which have no Planck measurements we estimated the upper flux density limit using the technique proposed in [60]. We used the maps of the microwave emission components obtained by Planck space telescope 4 [59], and the Planck source catalogs, which are available from the Planck Legacy Archive -PLA 5 .…”

Section: The Flux Densities Estimation At Millimeter and Submillimete...mentioning

confidence: 99%

“…There is a hypothesis about the increased likelihood of a positive response ("hot spots") on microwave background maps if a radio galaxy is located there [61]. It was shown that a fairly large number of extragalactic point sources with different spectral properties are detected at the 4σ on Planck maps containing signals of both the frequency channels and the cleaned CMB [60,62]. We used Aladin application [63,64] to identify the spots with the objects studied and to measure the distance from the source to the center of the spot.…”

Section: The Flux Densities Estimation At Millimeter and Submillimete...mentioning

confidence: 99%

“…We used Source Extractor program (SExtractor) 6 [65] for photometric measurements of the signals from spots and to determine the integrated brightness of spots on Planck maps. Then we converted the inferred brightness temperatures into fluxes using the calibration curves [60], which relate flux densities of the sources (in Jy) with the microwave background tem-perature on Planck maps (in Kelvins).…”

Section: The Flux Densities Estimation At Millimeter and Submillimete...mentioning

confidence: 99%

See 2 more Smart Citations

Multifrequency Study of GHz-peaked Spectrum Sources

et al. 2019

Self Cite

View full text Add to dashboard Cite

Gigahertz-Peaked spectrum (GPS) sources are compact active galactic nuclei, presumably young precursors of bright radio sources. The study of GPS radio properties provides information about the features of synchrotron radiation in extragalactic sources. Also in applied research GPS sources are useful as compact stationary radio sources in the sky for astrometric purposes. This paper presents the results of a multifrequency GPS study based on quasi-simultaneous measurements with the RATAN-600 radio telescope during the 2006-2017. The catalog containing spectral flux densities measured at six frequencies (1.1, 2.3, 4.8, 7.7/8.2, 11.2, and 21.7 GHz) have been obtained. In addition, for the analysis of radio spectra, data from the following low-frequency surveys have been used: GLEAM (GaLactic and Extragalactic All-sky Murchison widefield array survey) and TGSS (Tata institute for fundamental research GMRT Sky Survey) and high-frequency measurements from Planck survey. A total number of 164 GPS and candidates to GPS have been identified (17 of them are new discoveries), which makes up a small fraction of GPS in the initial sample of bright AGNs, about 2%. The physical properties and formation conditions of synchrotron radiation is found to be quite different in GPS of different AGN types. The deficit of distant GPS (z > 2) with low maximum frequencies (less than 1 GHz) is confirmed. The existing "size -peak frequency" anticorrelation is continuous. The continuum radio spectra are found to become statistically steeper with increasing redshift.

show abstract

Section: The Flux Densities Estimation At Millimeter and Submillimete...mentioning

confidence: 99%

Section: The Flux Densities Estimation At Millimeter and Submillimete...mentioning

confidence: 99%

Section: The Flux Densities Estimation At Millimeter and Submillimete...mentioning

confidence: 99%

See 1 more Smart Citation

Multifrequency Study of GHz-peaked Spectrum Sources

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…One way to solve it is to use masking from known sources (Ade et al, 2014h). However, as was shown in the works Verkhodanov et al (2015aVerkhodanov et al ( , b, 2016a, in which the fluctuations of the microwave background on the Planck frequency maps and CMB maps in the direction of the radio sources of the RCR catalog (RATAN Cold Refined) (Soboleva et al, 2010), at a level below the sensitivity threshold (less than ), a sufficiently large number of positive peaks are registered, which can be manifestations of either point extragalactic sources or background galactic components. Inhomogeneities of the positive signal on the Planck frequency maps in the millimeter and submillimeter ranges were also detected near GPSs (Gigahertz-Peaked spectrum)-objects observed on the RATAN-600 radio telescope in the period 2006-2017.…”

Section: 5 ′ ±mentioning

confidence: 68%

Spectral Properties of Microwave Background Inhomogeneities on Planck Multi-Frequency Maps Near RCR Catalog Sources

Majorova

Желенкова

2021

Astrophys. Bull.

Self Cite

View full text Add to dashboard Cite

The spectral properties of the inhomogeneities of the microwave background on Planck multi-frequency maps that are distant from the sources of the RCR catalog by the half-width of the power beam pattern of the high-frequency Planck complex ( ), as well as the spectral features of the sources depending on the presence of positive spots near them, are studied. About 830 objects of the catalog were examined for the detection of spots with positive amplitudes near them. The features that indicate the connection of positive peaks on the Planck maps with the nearest radio sources are revealed. First, it is the excess of the number of RCR sources with flat and normal spectra, near which there are spots, over the number of sources with steep spectra. Secondly, the number of spots with positive amplitude on Planck maps that coincide within with the coordinates of source-free areas on NVSS, FIRST maps and have the same sizes is on average almost one and a half times less than the number of spots that coincide with RCR objects. It is shown that RCR objects, near which there are no spots, have steeper spectra compared to the spectra of sources, near which spots are detected. The distribution of the spectral indices of spots in the range of 30-217 GHz was close to the distribution of the spectral indices of RCR sources in the range of 100 MHz-8.5 GHz, and their median values almost coincided. This may indicate that the positive fluctuations on the Planck maps detected near RCR objects in the range of 30-217 GHz are synchrotron in nature and may be associated with these objects. They can be manifestations of these objects or manifestations of their host galaxies and their environment in the submillimeter range. In the range of 353-857 GHz, some of the detected spots can be classified as dusty. The spectra of RCR sources, near which such spots were detected, were steeper than the spectra of RCR objects, near which spots were detected only in the frequency channels 30-217 GHz. The steeper the spectrum of the RCR object in the range of 100 MHz-8.5 GHz, the greater the value of the positive spectral index of the nearest spot in the range of 353-857 GHz. The spots, whose two-frequency spectral indices indicate their dusty nature, may be associated with the high dust content in the host galaxies of RCR objects and the processes of star formation in them. It is also possible that the rise in the spectra at high frequencies may be caused by the presence of a signal from cold galactic dust on the frequency maps.

show abstract

“…Earlier we already used the approach based on selecting cluster candidates using the SZeffect in the direction of radio sources (see [25][26][27]). In this study we continue developing the field related to an automated SZ-object selection algorithm based on machine learning methods (see the description of the first experiment in [28]).…”

mentioning

confidence: 99%

Search for Galaxy Cluster Candidates in the Cosmic Microwave Background Maps of the Planck Space Mission Using a Convolutional Neural Network Based on the Method of Tracing the Sunyaev-Zeldovich Effect

Верходанов

Topchieva

Oronovskaya

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

We propose a method of searching for radio sources exhibiting the Sunyaev-Zeldovich effect in the multi-frequency emission maps from the Planck mission data using a convolutional neural network. A catalog for recognizing radio sources is compiled using the GLESP pixelation scheme at the frequencies of 100, 143, 217, 353, and 545 GHz. The quality of the proposed approach is evaluated and the quality of the dependence of model data on the S/N ratio is estimated. We show that the presented neural network approach allows the detection of sources with the Sunyaev-Zeldovich effect. The proposed method can be used to find the most likely galaxy cluster candidates at large redshifts.

show abstract

Investigation of the RCR catalog sources in the millimeter and submillimeter ranges based on the Planck mission data

Cited by 17 publications

References 52 publications

Multifrequency Study of GHz-peaked Spectrum Sources

Multifrequency Study of GHz-peaked Spectrum Sources

Spectral Properties of Microwave Background Inhomogeneities on Planck Multi-Frequency Maps Near RCR Catalog Sources

Search for Galaxy Cluster Candidates in the Cosmic Microwave Background Maps of the Planck Space Mission Using a Convolutional Neural Network Based on the Method of Tracing the Sunyaev-Zeldovich Effect

Contact Info

Product

Resources

About