Class information for:
Level 1: QUASARS ABSORPTION LINES//INTERGALACTIC MEDIUM//GALAXIES QUASARS ABSORPTION LINES

Basic class information

Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes

The table includes all classes above and classes immediately below the current class.



Cluster id Level Cluster label #P
23 4 ASTRONOMY & ASTROPHYSICS//ASTROPHYSICAL JOURNAL//ASTRON 393400
1 3       ASTRONOMY & ASTROPHYSICS//ASTROPHYSICAL JOURNAL//ASTRON 234120
0 2             GALAXIES EVOLUTION//ASTRONOMY & ASTROPHYSICS//GALAXIES FORMATION 63445
1297 1                   QUASARS ABSORPTION LINES//INTERGALACTIC MEDIUM//GALAXIES QUASARS ABSORPTION LINES 2749

Terms with highest relevance score



rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 QUASARS ABSORPTION LINES authKW 10503043 54% 61% 1491
2 INTERGALACTIC MEDIUM authKW 3556502 36% 32% 979
3 GALAXIES QUASARS ABSORPTION LINES authKW 372811 2% 59% 55
4 COSMOLOGY OBSERVATIONS authKW 297050 14% 7% 395
5 GALAXIES HALOS authKW 285453 7% 13% 190
6 GALAXIES ABUNDANCES authKW 222903 8% 9% 214
7 COSMOLOGY THEORY authKW 195994 12% 5% 332
8 LARGE SCALE STRUCTURE OF UNIVERSE authKW 185491 11% 5% 309
9 ASTROPHYSICAL JOURNAL journal 180623 41% 1% 1125
10 GALAXIES EVOLUTION authKW 171092 15% 4% 422

Web of Science journal categories



chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Astronomy & Astrophysics 161541 98% 1% 2704
2 Physics, Particles & Fields 2 1% 0% 36
3 Engineering, Aerospace -1 0% 0% 4
4 Multidisciplinary Sciences -6 0% 0% 1
5 Physics, Nuclear -7 0% 0% 10
6 Physics, Mathematical -12 0% 0% 5
7 Statistics & Probability -12 0% 0% 2
8 Physics, Multidisciplinary -13 1% 0% 27
9 Physics, Fluids & Plasmas -14 0% 0% 1
10 Meteorology & Atmospheric Sciences -15 0% 0% 3

Address terms



chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 UCO LICK OBSERV 119897 3% 13% 79
2 ASTROPHYS SPACE SCI 107498 4% 8% 113
3 ASTRON 97987 27% 1% 750
4 ASTRON ASTROPHYS 84065 13% 2% 345
5 LICK OBSERV 78520 4% 7% 103
6 ASTROPHYS PLANETARY SCI 59050 3% 6% 93
7 CASA 50225 2% 10% 42
8 UNIV CALIF OBSERV 48970 2% 7% 61
9 ASTROPHYS PARIS 48327 4% 4% 104
10 DAEC CNRS UA 173 45852 0% 100% 4

Journals



chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 ASTROPHYSICAL JOURNAL 180623 41% 1% 1125
2 MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 123716 26% 2% 707
3 ASTRONOMY & ASTROPHYSICS 16370 10% 1% 273
4 ASTRONOMICAL JOURNAL 10937 4% 1% 119
5 ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 10647 2% 1% 67
6 IAU SYMPOSIA 4619 2% 1% 57
7 ASTROPHYSICAL JOURNAL LETTERS 3497 2% 1% 45
8 ASTROPHYSICS AND SPACE SCIENCE 3027 2% 0% 59
9 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 2725 1% 1% 36
10 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 1320 0% 1% 11

Author Key Words



chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 QUASARS ABSORPTION LINES 10503043 54% 61% 1491 Search QUASARS+ABSORPTION+LINES Search QUASARS+ABSORPTION+LINES
2 INTERGALACTIC MEDIUM 3556502 36% 32% 979 Search INTERGALACTIC+MEDIUM Search INTERGALACTIC+MEDIUM
3 GALAXIES QUASARS ABSORPTION LINES 372811 2% 59% 55 Search GALAXIES+QUASARS+ABSORPTION+LINES Search GALAXIES+QUASARS+ABSORPTION+LINES
4 COSMOLOGY OBSERVATIONS 297050 14% 7% 395 Search COSMOLOGY+OBSERVATIONS Search COSMOLOGY+OBSERVATIONS
5 GALAXIES HALOS 285453 7% 13% 190 Search GALAXIES+HALOS Search GALAXIES+HALOS
6 GALAXIES ABUNDANCES 222903 8% 9% 214 Search GALAXIES+ABUNDANCES Search GALAXIES+ABUNDANCES
7 COSMOLOGY THEORY 195994 12% 5% 332 Search COSMOLOGY+THEORY Search COSMOLOGY+THEORY
8 LARGE SCALE STRUCTURE OF UNIVERSE 185491 11% 5% 309 Search LARGE+SCALE+STRUCTURE+OF+UNIVERSE Search LARGE+SCALE+STRUCTURE+OF+UNIVERSE
9 GALAXIES EVOLUTION 171092 15% 4% 422 Search GALAXIES+EVOLUTION Search GALAXIES+EVOLUTION
10 GALAXIES FORMATION 170831 11% 5% 313 Search GALAXIES+FORMATION Search GALAXIES+FORMATION

Core articles

The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.

Classes with closest relation at Level 1



rank cluster_id2 link
1 5275 GALAXIES HIGH REDSHIFT//GALAXIES EVOLUTION//GALAXIES FORMATION
2 2679 DARK AGES REIONIZATION FIRST STARS//COSMOLOGY THEORY//EARLY UNIVERSE
3 4383 GALAXY HALO//ISM BUBBLES//ISM STRUCTURE
4 8687 QUASARS GENERAL//QUASARS//ASTRONOMY & ASTROPHYSICS
5 928 QUASARS EMISSION LINES//QUASARS GENERAL//GALAXIES ACTIVE
6 7411 ISM ABUNDANCES//ULTRAVIOLET ISM//ISM MOLECULES
7 330 GALAXIES EVOLUTION//GALAXIES FORMATION//GALAXIES HIGH REDSHIFT
8 12239 GALAXIES LUMINOSITY FUNCTION MASS FUNCTION//GALAXIES PHOTOMETRY//GALAXIES EVOLUTION
9 11116 RADIO LINES GALAXIES//GALAXIES CLUSTERS INDIVIDUAL VIRGO//GALAXIES ISM
10 21103 QUASARS GENERAL//QUASARS INDIVIDUAL HE 0450 2958//QUASARS INDIVIDUAL I ZW 1

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