J/other/AstBu/76.109 Planck maps spots near RCR sources (Majorova+, 2021)
Spectral properties of microwave background inhomogeneities on Planck
multi-frequency maps near RCR catalog sources.
Majorova E.K., Zhelenkova O.P.
<Astrophys. Bull., 76, 109-122 (2021)>
=2021AstBu..76..109M 2021AstBu..76..109M (SIMBAD/NED BibCode)
ADC_Keywords: Radio sources ; Radio continuum
Keywords: radio continuum: general - surveys - radio sources: general -
radio sources: identifications
Abstract:
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 (±2.5 arcmin), 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 ±2.5 arcmin 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
100MHz-8.5GHz 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 30-217GHz 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 353-857GHz, 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 30-217GHz. The steeper the
spectrum of the RCR object in the range of 100MHz-8.5GHz, the greater
the value of the positive spectral index of the nearest spot in the
range of 353-857GHz. 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.
Description:
From 1980 till 1999 a few surveys of 40'-width sky strip, centred on
SS433 declination have been carried out in the experiment COLD on the
radio telescope RATAN-600. On a basis of the given observations
1980-1981 on 7.6 cm wavelength (3.94 GHz) has been obtained the RC
(RATAN Cold) catalogue (see Parijskij et al. 1991A&AS...87....1P 1991A&AS...87....1P,
1992A&AS...96..583P 1992A&AS...96..583P). Re-processing of the surveys data in the range
of 2h<R.A.<17h were conducted for improvement of coordinates and flux
densities of the RC catalogue sources (see Soboleva et al.
2010AstBu...65...42S, 2018AstBu...72..142Z and 2017AstBu...72..150Z).
This RCR (Refined RATAN Cold) 872 objects including 12 two-component
sources, 27 ones only one survey detected and 3 transient candidates.
We conducted identifications of RCR sources based on the data of
modern optical sky surveys, and candidate hosts were found for almost
all of them.
We conducted research to detect inhomogeneities of the microwave
background on Planck multi-frequency maps near 830 RCR sources within
the half-width of the power beam pattern of the high-frequency Planck
complex (±2.5 arcmin). Based on the results of the work, a
connection was found between inhomogeneities with an integral
thermodynamic temperature at a level less than 5 sigma and radio
sources. The table shows the flux densities of these spots in the
frequency range 30-857GHz.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 108 593 Flux densities of spots on the Planck mission
multi-frequency maps near 593 radio sources
of the catalogue RCR
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See also:
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+, 1998)
J/other/AstBu/65.42 : RATAN COLD Refined (RCR) catalogue (Soboleva+, 2010)
J/other/AstBu/72.150 : RATAN COLD Reined (RCR) catalogue (Zhelenkova+, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name NVSS name for RCR catalog source
15- 18 F4.2 Jy S30 ? 30GHz flux density of positive spot on
Planck images near RCR source estimated with
help SExtractor tool and calibration curves
constructed by the Planck catalog sources
20- 23 F4.2 Jy e_S30 ? 30GHz flux density error
25- 28 F4.2 Jy S44 ? 44GHz flux density
30- 33 F4.2 Jy e_S44 ? 44GHz flux density error
35- 38 F4.2 Jy S70 ? 70GHz flux density
40- 43 F4.2 Jy e_S70 ? 70GHz flux density error
45- 48 F4.2 Jy S100 ? 100GHz flux density
50- 53 F4.2 Jy e_S100 ? 100GHz flux density error
55- 58 F4.2 Jy S143 ? 143GHz flux density
60- 63 F4.2 Jy e_S143 ? 143GHz flux density error
65- 68 F4.2 Jy S217 ? 217GHz flux density
70- 73 F4.2 Jy e_S217 ? 217GHz flux density error
75- 78 F4.2 Jy S353 ? 353GHz flux density
80- 83 F4.2 Jy e_S353 ? 353GHz flux density error
85- 89 F5.2 Jy S545 ? 545GHz flux density
91- 94 F4.2 Jy e_S545 ? 545GHz flux density error
96-100 F5.2 Jy S857 ? 857GHz flux density
102-106 F5.2 Jy e_S857 ? 857GHz flux density error
108 A1 --- Com [b*] Comment (1)
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Note (1): Comments as follows:
b = two NVSS sources fall into the beam pattern
* = Planck catalog source
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Acknowledgements:
Olga Zhelenkova, zhe(at)sao.ru
(End) Olga Zhelenkova [SAO RAS, Russia], Patricia Vannier [CDS] 19-May-2021