Radio spectra of objects in the RATAN-600 RZF catalog and a population analysis of faint radio sources View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2007-04

AUTHORS

T. A. Semenova, N. N. Bursov, Yu. N. Pariĭskiĭ

ABSTRACT

Results of centimeter-wavelength RATAN-600 observations of several hundred NVSS objects with a wide range of flux densities are presented. Changes in spectral-index distributions from strong-to faint-object populations are estimated. In the transition from strong to faint radio sources, the number of steep-and ultrasteep-spectrum objects decreases and the minimum between steep-and flat-spectrum objects, which was first discovered in the 1970s, becomes less distinct. A less certain increase in the fraction of inverted-spectrum objects is also found. Comparison with theoretical models of radio-source evolution suggests that the decrease in the number of steep-and ultrasteep-spectrum objects can be naturally explained by a sharp decrease in the fraction of classical FRII radio galaxies. The decrease in the sharpness of the minimum may be due to the growing contribution from the population with spectral indices 0.7–0.5, which is usually identified with starbust galaxies. The small increase in the fraction of inverted-spectrum radio sources can be attributed to the growing number of objects with active nuclei. Our spectrum-based conclusions are confirmed by the morphology of the FIRST Catalog images. The number of radio sources associated with supermassive black holes in the Early Universe is estimated using data from the SDSS Catalog. More... »

PAGES

257-263

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1063772907040014

DOI

http://dx.doi.org/10.1134/s1063772907040014

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1013277422


Indexing Status Check whether this publication has been indexed by Scopus and Web Of Science using the SN Indexing Status Tool
Incoming Citations Browse incoming citations for this publication using opencitations.net

JSON-LD is the canonical representation for SciGraph data.

TIP: You can open this SciGraph record using an external JSON-LD service: JSON-LD Playground Google SDTT

[
  {
    "@context": "https://springernature.github.io/scigraph/jsonld/sgcontext.json", 
    "about": [
      {
        "id": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/02", 
        "inDefinedTermSet": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/", 
        "name": "Physical Sciences", 
        "type": "DefinedTerm"
      }, 
      {
        "id": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/0201", 
        "inDefinedTermSet": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/", 
        "name": "Astronomical and Space Sciences", 
        "type": "DefinedTerm"
      }
    ], 
    "author": [
      {
        "affiliation": {
          "alternateName": "Special Astrophysical Observatory, Russian Academy of Sciences, 357169, Nizhni\u012d Arkhyz, Karachaevo-Cherkesskaya Republic, Russia", 
          "id": "http://www.grid.ac/institutes/grid.452760.2", 
          "name": [
            "Special Astrophysical Observatory, Russian Academy of Sciences, 357169, Nizhni\u012d Arkhyz, Karachaevo-Cherkesskaya Republic, Russia"
          ], 
          "type": "Organization"
        }, 
        "familyName": "Semenova", 
        "givenName": "T. A.", 
        "id": "sg:person.013334666045.35", 
        "sameAs": [
          "https://app.dimensions.ai/discover/publication?and_facet_researcher=ur.013334666045.35"
        ], 
        "type": "Person"
      }, 
      {
        "affiliation": {
          "alternateName": "Special Astrophysical Observatory, Russian Academy of Sciences, 357169, Nizhni\u012d Arkhyz, Karachaevo-Cherkesskaya Republic, Russia", 
          "id": "http://www.grid.ac/institutes/grid.452760.2", 
          "name": [
            "Special Astrophysical Observatory, Russian Academy of Sciences, 357169, Nizhni\u012d Arkhyz, Karachaevo-Cherkesskaya Republic, Russia"
          ], 
          "type": "Organization"
        }, 
        "familyName": "Bursov", 
        "givenName": "N. N.", 
        "id": "sg:person.010360541444.22", 
        "sameAs": [
          "https://app.dimensions.ai/discover/publication?and_facet_researcher=ur.010360541444.22"
        ], 
        "type": "Person"
      }, 
      {
        "affiliation": {
          "alternateName": "Special Astrophysical Observatory, Russian Academy of Sciences, 357169, Nizhni\u012d Arkhyz, Karachaevo-Cherkesskaya Republic, Russia", 
          "id": "http://www.grid.ac/institutes/grid.452760.2", 
          "name": [
            "Special Astrophysical Observatory, Russian Academy of Sciences, 357169, Nizhni\u012d Arkhyz, Karachaevo-Cherkesskaya Republic, Russia"
          ], 
          "type": "Organization"
        }, 
        "familyName": "Pari\u012dski\u012d", 
        "givenName": "Yu. N.", 
        "id": "sg:person.07563225673.38", 
        "sameAs": [
          "https://app.dimensions.ai/discover/publication?and_facet_researcher=ur.07563225673.38"
        ], 
        "type": "Person"
      }
    ], 
    "citation": [
      {
        "id": "sg:pub.10.1134/s1063773706070012", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1021276828", 
          "https://doi.org/10.1134/s1063773706070012"
        ], 
        "type": "CreativeWork"
      }
    ], 
    "datePublished": "2007-04", 
    "datePublishedReg": "2007-04-01", 
    "description": "Results of centimeter-wavelength RATAN-600 observations of several hundred NVSS objects with a wide range of flux densities are presented. Changes in spectral-index distributions from strong-to faint-object populations are estimated. In the transition from strong to faint radio sources, the number of steep-and ultrasteep-spectrum objects decreases and the minimum between steep-and flat-spectrum objects, which was first discovered in the 1970s, becomes less distinct. A less certain increase in the fraction of inverted-spectrum objects is also found. Comparison with theoretical models of radio-source evolution suggests that the decrease in the number of steep-and ultrasteep-spectrum objects can be naturally explained by a sharp decrease in the fraction of classical FRII radio galaxies. The decrease in the sharpness of the minimum may be due to the growing contribution from the population with spectral indices 0.7\u20130.5, which is usually identified with starbust galaxies. The small increase in the fraction of inverted-spectrum radio sources can be attributed to the growing number of objects with active nuclei. Our spectrum-based conclusions are confirmed by the morphology of the FIRST Catalog images. The number of radio sources associated with supermassive black holes in the Early Universe is estimated using data from the SDSS Catalog.", 
    "genre": "article", 
    "id": "sg:pub.10.1134/s1063772907040014", 
    "inLanguage": "en", 
    "isAccessibleForFree": false, 
    "isPartOf": [
      {
        "id": "sg:journal.1136138", 
        "issn": [
          "0004-6299", 
          "1063-7729"
        ], 
        "name": "Astronomy Reports", 
        "publisher": "Pleiades Publishing", 
        "type": "Periodical"
      }, 
      {
        "issueNumber": "4", 
        "type": "PublicationIssue"
      }, 
      {
        "type": "PublicationVolume", 
        "volumeNumber": "51"
      }
    ], 
    "keywords": [
      "faint radio sources", 
      "radio sources", 
      "flat-spectrum objects", 
      "spectral-index distribution", 
      "FRII radio galaxies", 
      "supermassive black holes", 
      "starbust galaxies", 
      "radio galaxies", 
      "RATAN-600 observations", 
      "early universe", 
      "active nuclei", 
      "SDSS catalog", 
      "black holes", 
      "radio spectrum", 
      "galaxies", 
      "flux density", 
      "theoretical model", 
      "object decreases", 
      "NVSS", 
      "catalogue", 
      "catalog images", 
      "universe", 
      "population analysis", 
      "holes", 
      "source", 
      "spectra", 
      "objects", 
      "transition", 
      "nucleus", 
      "density", 
      "minimum", 
      "sharp decrease", 
      "wide range", 
      "steep", 
      "number of objects", 
      "sharpness", 
      "fraction", 
      "morphology", 
      "evolution", 
      "range", 
      "distribution", 
      "images", 
      "contribution", 
      "decrease", 
      "number", 
      "increase", 
      "model", 
      "results", 
      "comparison", 
      "certain increase", 
      "data", 
      "small increase", 
      "analysis", 
      "changes", 
      "population", 
      "conclusion", 
      "observations", 
      "centimeter-wavelength RATAN-600 observations", 
      "faint-object populations", 
      "number of steep", 
      "ultrasteep-spectrum objects decreases", 
      "inverted-spectrum objects", 
      "radio-source evolution", 
      "ultrasteep-spectrum objects", 
      "classical FRII radio galaxies", 
      "spectral indices 0.7", 
      "indices 0.7", 
      "inverted-spectrum radio sources", 
      "spectrum-based conclusions", 
      "FIRST Catalog images", 
      "RATAN-600 RZF catalog", 
      "RZF catalog"
    ], 
    "name": "Radio spectra of objects in the RATAN-600 RZF catalog and a population analysis of faint radio sources", 
    "pagination": "257-263", 
    "productId": [
      {
        "name": "dimensions_id", 
        "type": "PropertyValue", 
        "value": [
          "pub.1013277422"
        ]
      }, 
      {
        "name": "doi", 
        "type": "PropertyValue", 
        "value": [
          "10.1134/s1063772907040014"
        ]
      }
    ], 
    "sameAs": [
      "https://doi.org/10.1134/s1063772907040014", 
      "https://app.dimensions.ai/details/publication/pub.1013277422"
    ], 
    "sdDataset": "articles", 
    "sdDatePublished": "2021-12-01T19:19", 
    "sdLicense": "https://scigraph.springernature.com/explorer/license/", 
    "sdPublisher": {
      "name": "Springer Nature - SN SciGraph project", 
      "type": "Organization"
    }, 
    "sdSource": "s3://com-springernature-scigraph/baseset/20211201/entities/gbq_results/article/article_442.jsonl", 
    "type": "ScholarlyArticle", 
    "url": "https://doi.org/10.1134/s1063772907040014"
  }
]
 

Download the RDF metadata as:  json-ld nt turtle xml License info

HOW TO GET THIS DATA PROGRAMMATICALLY:

JSON-LD is a popular format for linked data which is fully compatible with JSON.

curl -H 'Accept: application/ld+json' 'https://scigraph.springernature.com/pub.10.1134/s1063772907040014'

N-Triples is a line-based linked data format ideal for batch operations.

curl -H 'Accept: application/n-triples' 'https://scigraph.springernature.com/pub.10.1134/s1063772907040014'

Turtle is a human-readable linked data format.

curl -H 'Accept: text/turtle' 'https://scigraph.springernature.com/pub.10.1134/s1063772907040014'

RDF/XML is a standard XML format for linked data.

curl -H 'Accept: application/rdf+xml' 'https://scigraph.springernature.com/pub.10.1134/s1063772907040014'


 

This table displays all metadata directly associated to this object as RDF triples.

148 TRIPLES      22 PREDICATES      99 URIs      90 LITERALS      6 BLANK NODES

Subject Predicate Object
1 sg:pub.10.1134/s1063772907040014 schema:about anzsrc-for:02
2 anzsrc-for:0201
3 schema:author N6e0e6bc3069a4125aa6095f8d90c1ce6
4 schema:citation sg:pub.10.1134/s1063773706070012
5 schema:datePublished 2007-04
6 schema:datePublishedReg 2007-04-01
7 schema:description Results of centimeter-wavelength RATAN-600 observations of several hundred NVSS objects with a wide range of flux densities are presented. Changes in spectral-index distributions from strong-to faint-object populations are estimated. In the transition from strong to faint radio sources, the number of steep-and ultrasteep-spectrum objects decreases and the minimum between steep-and flat-spectrum objects, which was first discovered in the 1970s, becomes less distinct. A less certain increase in the fraction of inverted-spectrum objects is also found. Comparison with theoretical models of radio-source evolution suggests that the decrease in the number of steep-and ultrasteep-spectrum objects can be naturally explained by a sharp decrease in the fraction of classical FRII radio galaxies. The decrease in the sharpness of the minimum may be due to the growing contribution from the population with spectral indices 0.7–0.5, which is usually identified with starbust galaxies. The small increase in the fraction of inverted-spectrum radio sources can be attributed to the growing number of objects with active nuclei. Our spectrum-based conclusions are confirmed by the morphology of the FIRST Catalog images. The number of radio sources associated with supermassive black holes in the Early Universe is estimated using data from the SDSS Catalog.
8 schema:genre article
9 schema:inLanguage en
10 schema:isAccessibleForFree false
11 schema:isPartOf Na9cc6469b62b42a6b3aabbb47acd6146
12 Nf4b2b77950bc400a8e4f82d565996a5f
13 sg:journal.1136138
14 schema:keywords FIRST Catalog images
15 FRII radio galaxies
16 NVSS
17 RATAN-600 RZF catalog
18 RATAN-600 observations
19 RZF catalog
20 SDSS catalog
21 active nuclei
22 analysis
23 black holes
24 catalog images
25 catalogue
26 centimeter-wavelength RATAN-600 observations
27 certain increase
28 changes
29 classical FRII radio galaxies
30 comparison
31 conclusion
32 contribution
33 data
34 decrease
35 density
36 distribution
37 early universe
38 evolution
39 faint radio sources
40 faint-object populations
41 flat-spectrum objects
42 flux density
43 fraction
44 galaxies
45 holes
46 images
47 increase
48 indices 0.7
49 inverted-spectrum objects
50 inverted-spectrum radio sources
51 minimum
52 model
53 morphology
54 nucleus
55 number
56 number of objects
57 number of steep
58 object decreases
59 objects
60 observations
61 population
62 population analysis
63 radio galaxies
64 radio sources
65 radio spectrum
66 radio-source evolution
67 range
68 results
69 sharp decrease
70 sharpness
71 small increase
72 source
73 spectra
74 spectral indices 0.7
75 spectral-index distribution
76 spectrum-based conclusions
77 starbust galaxies
78 steep
79 supermassive black holes
80 theoretical model
81 transition
82 ultrasteep-spectrum objects
83 ultrasteep-spectrum objects decreases
84 universe
85 wide range
86 schema:name Radio spectra of objects in the RATAN-600 RZF catalog and a population analysis of faint radio sources
87 schema:pagination 257-263
88 schema:productId N5989c8632ee542839ef84eb75d83c999
89 N5bd11dcd93ee4167b2e6254a84ca6005
90 schema:sameAs https://app.dimensions.ai/details/publication/pub.1013277422
91 https://doi.org/10.1134/s1063772907040014
92 schema:sdDatePublished 2021-12-01T19:19
93 schema:sdLicense https://scigraph.springernature.com/explorer/license/
94 schema:sdPublisher N711726cb0da549838c4260dba6b4bbcd
95 schema:url https://doi.org/10.1134/s1063772907040014
96 sgo:license sg:explorer/license/
97 sgo:sdDataset articles
98 rdf:type schema:ScholarlyArticle
99 N067b57b20fe4465fad059e550844f05c rdf:first sg:person.010360541444.22
100 rdf:rest Nc8bae2f06b3e4a3788d41625bd5636c1
101 N5989c8632ee542839ef84eb75d83c999 schema:name doi
102 schema:value 10.1134/s1063772907040014
103 rdf:type schema:PropertyValue
104 N5bd11dcd93ee4167b2e6254a84ca6005 schema:name dimensions_id
105 schema:value pub.1013277422
106 rdf:type schema:PropertyValue
107 N6e0e6bc3069a4125aa6095f8d90c1ce6 rdf:first sg:person.013334666045.35
108 rdf:rest N067b57b20fe4465fad059e550844f05c
109 N711726cb0da549838c4260dba6b4bbcd schema:name Springer Nature - SN SciGraph project
110 rdf:type schema:Organization
111 Na9cc6469b62b42a6b3aabbb47acd6146 schema:issueNumber 4
112 rdf:type schema:PublicationIssue
113 Nc8bae2f06b3e4a3788d41625bd5636c1 rdf:first sg:person.07563225673.38
114 rdf:rest rdf:nil
115 Nf4b2b77950bc400a8e4f82d565996a5f schema:volumeNumber 51
116 rdf:type schema:PublicationVolume
117 anzsrc-for:02 schema:inDefinedTermSet anzsrc-for:
118 schema:name Physical Sciences
119 rdf:type schema:DefinedTerm
120 anzsrc-for:0201 schema:inDefinedTermSet anzsrc-for:
121 schema:name Astronomical and Space Sciences
122 rdf:type schema:DefinedTerm
123 sg:journal.1136138 schema:issn 0004-6299
124 1063-7729
125 schema:name Astronomy Reports
126 schema:publisher Pleiades Publishing
127 rdf:type schema:Periodical
128 sg:person.010360541444.22 schema:affiliation grid-institutes:grid.452760.2
129 schema:familyName Bursov
130 schema:givenName N. N.
131 schema:sameAs https://app.dimensions.ai/discover/publication?and_facet_researcher=ur.010360541444.22
132 rdf:type schema:Person
133 sg:person.013334666045.35 schema:affiliation grid-institutes:grid.452760.2
134 schema:familyName Semenova
135 schema:givenName T. A.
136 schema:sameAs https://app.dimensions.ai/discover/publication?and_facet_researcher=ur.013334666045.35
137 rdf:type schema:Person
138 sg:person.07563225673.38 schema:affiliation grid-institutes:grid.452760.2
139 schema:familyName Pariĭskiĭ
140 schema:givenName Yu. N.
141 schema:sameAs https://app.dimensions.ai/discover/publication?and_facet_researcher=ur.07563225673.38
142 rdf:type schema:Person
143 sg:pub.10.1134/s1063773706070012 schema:sameAs https://app.dimensions.ai/details/publication/pub.1021276828
144 https://doi.org/10.1134/s1063773706070012
145 rdf:type schema:CreativeWork
146 grid-institutes:grid.452760.2 schema:alternateName Special Astrophysical Observatory, Russian Academy of Sciences, 357169, Nizhniĭ Arkhyz, Karachaevo-Cherkesskaya Republic, Russia
147 schema:name Special Astrophysical Observatory, Russian Academy of Sciences, 357169, Nizhniĭ Arkhyz, Karachaevo-Cherkesskaya Republic, Russia
148 rdf:type schema:Organization
 




Preview window. Press ESC to close (or click here)


...