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

Basic class information
ID Publications Average number
of references		 Avg. shr. active
ref. in WoS
1454 2558 49.3 77%


Bar chart of Publication_year

Last years might be incomplete

Classes in level above (level 2)


ID, lev.
above		 Publications Label for level above
1 46016 GALAXIES EVOLUTION//LARGE SCALE STRUCTURE OF UNIVERSE//GALAXIES CLUSTERS GENERAL

Terms with highest relevance score


Rank Term Type of term Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class
1 QUASARS ABSORPTION LINES Author keyword 910 64% 35% 902
2 QUASARS ABSORPTION LINES Author keyword 348 54% 18% 449
3 INTERGALACTIC MEDIUM Author keyword 315 30% 34% 869
4 GALAXIES QUASARS ABSORPTION LINES Author keyword 40 55% 2% 50
5 LYMAN ALPHA FOREST Author keyword 25 75% 1% 18
6 GALAXIES ABUNDANCES Author keyword 18 12% 6% 143
7 ABSORPTION LINES Author keyword 12 38% 1% 26
8 GALAXIES HALOS Author keyword 12 14% 3% 79
9 GALAXIES HALOS Author keyword 8 10% 3% 77
10 QUASARS INDIVIDUAL J2233 606 Author keyword 8 100% 0% 5

Web of Science journal categories

Author Key Words


Rank Web of Science journal category Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class		 LCSH search Wikipedia search
1 QUASARS ABSORPTION LINES 910 64% 35% 902 Search QUASARS++ABSORPTION+LINES Search QUASARS++ABSORPTION+LINES
2 QUASARS ABSORPTION LINES 348 54% 18% 449 Search QUASARS+ABSORPTION+LINES Search QUASARS+ABSORPTION+LINES
3 INTERGALACTIC MEDIUM 315 30% 34% 869 Search INTERGALACTIC+MEDIUM Search INTERGALACTIC+MEDIUM
4 GALAXIES QUASARS ABSORPTION LINES 40 55% 2% 50 Search GALAXIES++QUASARS++ABSORPTION+LINES Search GALAXIES++QUASARS++ABSORPTION+LINES
5 LYMAN ALPHA FOREST 25 75% 1% 18 Search LYMAN+ALPHA+FOREST Search LYMAN+ALPHA+FOREST
6 GALAXIES ABUNDANCES 18 12% 6% 143 Search GALAXIES++ABUNDANCES Search GALAXIES++ABUNDANCES
7 ABSORPTION LINES 12 38% 1% 26 Search ABSORPTION+LINES Search ABSORPTION+LINES
8 GALAXIES HALOS 12 14% 3% 79 Search GALAXIES+HALOS Search GALAXIES+HALOS
9 GALAXIES HALOS 8 10% 3% 77 Search GALAXIES++HALOS Search GALAXIES++HALOS
10 QUASARS INDIVIDUAL J2233 606 8 100% 0% 5 Search QUASARS++INDIVIDUAL+J2233+606 Search QUASARS++INDIVIDUAL+J2233+606

Key Words Plus


Rank Web of Science journal category Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class
1 ABSORPTION SYSTEMS 223 63% 9% 227
2 LY ALPHA FOREST 192 45% 13% 320
3 ABSORPTION LINE SYSTEMS 190 78% 5% 124
4 ABSORBING CLOUDS 120 91% 2% 50
5 LINE SYSTEMS 115 85% 2% 61
6 MG II ABSORPTION 107 80% 3% 67
7 INTERGALACTIC MEDIUM 105 24% 15% 376
8 C IV ABSORPTION 104 60% 4% 113
9 LOW REDSHIFT 93 49% 5% 139
10 GASEOUS EXTENT 88 78% 2% 59

Journals

Reviews


Title Publ. year Cit. Active references % act. ref.
to same field
Radiative transfer in a clumpy universe .2. The ultraviolet extragalactic background 1996 976 81 69%
Damped Ly alpha systems at z < 1.65: The expanded Sloan Digital Sky Survey Hubble Space Telescope sample 2006 220 90 92%
Damped Ly alpha systems 2005 339 194 73%
The low-redshift Ly alpha forest in cold dark matter cosmologies 1999 319 86 80%
Discovery of damped Ly alpha systems at redshifts less than 1.65 and results on their incidence and cosmological mass density 2000 216 83 84%
The physics of the intergalactic medium 2009 94 548 64%
The lyman alpha forest in the spectra of quasistellar objects 1998 285 171 95%
A direct precision measurement of the intergalactic Ly alpha opacity at 2 <= z <= 4.2(1,2) 2008 89 95 74%
He II REIONIZATION AND ITS EFFECT ON THE INTERGALACTIC MEDIUM 2009 88 98 58%
Physical properties of galactic winds using background quasars 2012 55 93 55%

Address terms


Rank Address term Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class
1 UCO LICK OBSERV 6 11% 2.2% 55
2 DAEC CNRS UA 173 6 100% 0.2% 4
3 CASA 4 11% 1.3% 34
4 ST EUROPEAN COORDINATING IL 3 100% 0.1% 3
5 BRUCE ASTRID MCWILLIAMS COSMOL 3 32% 0.3% 7
6 DNSC 2 67% 0.1% 2
7 UA 173 2 30% 0.2% 6
8 MULTIPLE MIRROR TELESCOPE OBSERV 1 17% 0.3% 8
9 IRFU SPP 1 16% 0.3% 8
10 DAEC UA CNRS 173 1 100% 0.1% 2

Related classes at same level (level 1)


Rank Relatedness score Related classes
1 0.0000132646 QUASARS GENERAL//QUASARS GENERAL//QUASARS ABSORPTION LINES
2 0.0000130847 DARK AGES REIONIZATION FIRST STARS//EARLY UNIVERSE//STARS POPULATION III
3 0.0000121111 GALAXY HALO//ISM BUBBLES//ISM STRUCTURE
4 0.0000101053 GALAXIES HIGH REDSHIFT//GALAXIES EVOLUTION//GALAXIES FORMATION
5 0.0000072706 ICRAR M468//CORROS CHEM ENGN//HALOES OF
6 0.0000069252 ISM INDIVIDUAL SHARPLESS 269//NLTE EFFECTS//OBSERV ALGER
7 0.0000063688 ISM ABUNDANCES//ULTRAVIOLET ISM//ISM ATOMS
8 0.0000061440 GALAXIES LUMINOSITY FUNCTION MASS FUNCTION//PHYS ASTROPHYS GRP//GALAXIES LUMINOSITY FUNCTION MASS FUNCTION GALAXIES PHOTOMETRY
9 0.0000054749 GALAXIES INDIVIDUAL IC 2497//QUASARS INDIVIDUAL I ZW 1//GALAXIES FUNDAMENTAL PARAMETERS CLASSIFICATION COLORS LUMINOSITIES MASSES RADII ETC
10 0.0000053723 ULTRAVIOLET ASTRONOMY//GALAXIES MILKY WAY//AEGORA