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

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
1383 2689 52.1 78%


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
19 4 ASTRONOMY & ASTROPHYSICS//ASTROPHYSICAL JOURNAL//ASTRON 523489
8 3       ASTRONOMY & ASTROPHYSICS//ASTROPHYSICAL JOURNAL//MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 146114
0 2             GALAXIES EVOLUTION//ASTRONOMY & ASTROPHYSICS//MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 61580
1383 1                   QUASARS ABSORPTION LINES//INTERGALACTIC MEDIUM//GALAXIES QUASARS ABSORPTION LINES 2689

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class
1 QUASARS ABSORPTION LINES authKW 10197002 54% 62% 1451
2 INTERGALACTIC MEDIUM authKW 3447955 35% 32% 951
3 GALAXIES QUASARS ABSORPTION LINES authKW 355952 2% 58% 54
4 COSMOLOGY OBSERVATIONS authKW 296249 15% 7% 390
5 GALAXIES HALOS authKW 268315 7% 13% 182
6 GALAXIES ABUNDANCES authKW 222452 8% 9% 210
7 GALAXIES EVOLUTION authKW 177291 16% 4% 421
8 GALAXIES FORMATION authKW 177150 12% 5% 314
9 ASTROPHYSICAL JOURNAL journal 173015 41% 1% 1091
10 LYMAN ALPHA FOREST authKW 161504 1% 68% 21

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class
1 Astronomy & Astrophysics 157757 99% 1% 2651
2 Physics, Particles & Fields 1 1% 0% 34
3 Engineering, Aerospace -1 0% 0% 4
4 Multidisciplinary Sciences -6 0% 0% 1
5 Physics, Nuclear -10 0% 0% 8
6 Statistics & Probability -14 0% 0% 1
7 Physics, Multidisciplinary -14 1% 0% 25
8 Meteorology & Atmospheric Sciences -15 0% 0% 3
9 Computer Science, Interdisciplinary Applications -15 0% 0% 2
10 Spectroscopy -16 0% 0% 2

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 UCO LICK OBSERV 114920 3% 13% 76
2 ASTROPHYS SPACE SCI 108662 4% 9% 111
3 ASTRON 98919 28% 1% 740
4 ASTRON ASTROPHYS 82981 12% 2% 335
5 LICK OBSERV 72929 4% 7% 99
6 ASTROPHYS PLANETARY SCI 60842 3% 6% 92
7 CASA 50822 2% 11% 41
8 ASTROPHYS PARIS 47965 4% 4% 101
9 UNIV CALIF OBSERV 46224 2% 7% 59
10 DAEC CNRS UA 173 45415 0% 100% 4

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class
1 ASTROPHYSICAL JOURNAL 173015 41% 1% 1091
2 MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 120748 25% 2% 683
3 ASTRONOMY & ASTROPHYSICS 16835 10% 1% 276
4 ASTRONOMICAL JOURNAL 11874 5% 1% 123
5 ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 10182 2% 1% 65
6 IAU SYMPOSIA 4422 2% 1% 56
7 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 3390 1% 1% 40
8 ASTROPHYSICAL JOURNAL LETTERS 3028 2% 1% 41
9 ASTROPHYSICS AND SPACE SCIENCE 2920 2% 0% 58
10 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 1603 0% 1% 12

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class		 LCSH search Wikipedia search
1 QUASARS ABSORPTION LINES 10197002 54% 62% 1451 Search QUASARS+ABSORPTION+LINES Search QUASARS+ABSORPTION+LINES
2 INTERGALACTIC MEDIUM 3447955 35% 32% 951 Search INTERGALACTIC+MEDIUM Search INTERGALACTIC+MEDIUM
3 GALAXIES QUASARS ABSORPTION LINES 355952 2% 58% 54 Search GALAXIES+QUASARS+ABSORPTION+LINES Search GALAXIES+QUASARS+ABSORPTION+LINES
4 COSMOLOGY OBSERVATIONS 296249 15% 7% 390 Search COSMOLOGY+OBSERVATIONS Search COSMOLOGY+OBSERVATIONS
5 GALAXIES HALOS 268315 7% 13% 182 Search GALAXIES+HALOS Search GALAXIES+HALOS
6 GALAXIES ABUNDANCES 222452 8% 9% 210 Search GALAXIES+ABUNDANCES Search GALAXIES+ABUNDANCES
7 GALAXIES EVOLUTION 177291 16% 4% 421 Search GALAXIES+EVOLUTION Search GALAXIES+EVOLUTION
8 GALAXIES FORMATION 177150 12% 5% 314 Search GALAXIES+FORMATION Search GALAXIES+FORMATION
9 LYMAN ALPHA FOREST 161504 1% 68% 21 Search LYMAN+ALPHA+FOREST Search LYMAN+ALPHA+FOREST
10 GALAXIES ISM 155699 10% 5% 266 Search GALAXIES+ISM Search GALAXIES+ISM

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.


Rank Reference # ref. in
cl.		 Shr. of ref. in
cl.		 Citations
1 MEIKSIN, AA , (2009) THE PHYSICS OF THE INTERGALACTIC MEDIUM.REVIEWS OF MODERN PHYSICS. VOL. 81. ISSUE 4. P. 1405 -1469 353 64% 122
2 QUIRET, S , PEROUX, C , ZAFAR, T , KULKARNI, VP , JENKINS, EB , MILLIARD, B , RAHMANI, H , POPPING, A , RAO, SM , TURNSHEK, DA , ET AL (2016) THE ESO UVES ADVANCED DATA PRODUCTS QUASAR SAMPLE - VI. SUB-DAMPED LYMAN ALPHA METALLICITY MEASUREMENTS AND THE CIRCUMGALACTIC MEDIUM.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. VOL. 458. ISSUE 4. P. 4074 -4121 164 85% 7
3 RAUCH, M , (1998) THE LYMAN ALPHA FOREST IN THE SPECTRA OF QUASISTELLAR OBJECTS.ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS. VOL. 36. ISSUE . P. 267 -316 164 94% 302
4 KANEKAR, N , PROCHASKA, JX , SMETTE, A , ELLISON, SL , RYAN-WEBER, EV , MOMJIAN, E , BRIGGS, FH , LANE, WM , CHENGALUR, JN , DELAFOSSE, T , ET AL (2014) THE SPIN TEMPERATURE OF HIGH-REDSHIFT DAMPED LYMAN ALPHA SYSTEMS.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. VOL. 438. ISSUE 3. P. 2131 -2166 138 80% 22
5 WOLFE, AM , GAWISER, E , PROCHASKA, JX , (2005) DAMPED LY ALPHA SYSTEMS.ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS. VOL. 43. ISSUE . P. 861 -918 139 72% 391
6 PETITJEAN, P , (1999) THE BARYONS IN THE UNIVERSE FROM QUASAR ABSORPTION LINE SYSTEMS.ANNALES DE PHYSIQUE. VOL. 24. ISSUE 1. P. 1 -+ 206 79% 1
7 MCQUINN, M , (2016) THE EVOLUTION OF THE INTERGALACTIC MEDIUM.ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 54. VOL. 54. ISSUE . P. 313 -362 182 47% 2
8 RAHMANI, H , PEROUX, C , TURNSHEK, DA , RAO, SM , QUIRET, S , HAMILTON, TS , KULKARNI, VP , MONIER, EM , ZAFAR, T , (2016) A STUDY OF THE CIRCUMGALACTIC MEDIUM AT Z SIMILAR TO 0.6 USING DAMPED LYMAN ALPHA GALAXIES.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. VOL. 463. ISSUE 1. P. 980 -1007 125 70% 1
9 LEHNER, N , HOWK, JC , TRIPP, TM , TUMLINSON, J , PROCHASKA, JX , O'MEARA, JM , THOM, C , WERK, JK , FOX, AJ , RIBAUDO, J , (2013) THE BIMODAL METALLICITY DISTRIBUTION OF THE COOL CIRCUMGALACTIC MEDIUM AT Z LESS THAN OR SIMILAR TO 1.ASTROPHYSICAL JOURNAL. VOL. 770. ISSUE 2. P. - 96 72% 64
10 BERG, TAM , ELLISON, SL , PROCHASKA, JX , VENN, KA , DESSAUGES-ZAVADSKY, M , (2015) THE CHEMISTRY OF THE MOST METAL-RICH DAMPED LYMAN ALPHA SYSTEMS AT Z SIMILAR TO 2-II. CONTEXT WITH THE LOCAL GROUP.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. VOL. 452. ISSUE 4. P. 4326 -4346 131 62% 6

Classes with closest relation at Level 1


Rank Class id link
1 5643 GALAXIES HIGH REDSHIFT//GALAXIES FORMATION//GALAXIES EVOLUTION
2 6699 GALAXY HALO//ISM BUBBLES//ISM STRUCTURE
3 2635 COSMOLOGY THEORY//DARK AGES REIONIZATION FIRST STARS//EARLY UNIVERSE
4 6427 QUASARS GENERAL//ASTRONOMY & ASTROPHYSICS//QUASARS
5 37491 FRANCE ASTROPHYS THEOR 98 BIS BD ARAGO//INTENSITY RATIO CO C 12 COC 13//QUASARS ABSORPTION LINES QUASARS INDIVIDUAL Q 1100 264
6 1637 QUASARS EMISSION LINES//GALAXIES ACTIVE//QUASARS GENERAL
7 10661 RADIO LINES GALAXIES//GALAXIES CLUSTERS INDIVIDUAL VIRGO//GALAXIES ISM
8 21251 ULTRAVIOLET ISM//ISM INDIVIDUAL OBJECTS ORION ERIDANUS//TECHNIQUES ULTRAVIOLET
9 7171 ISM ABUNDANCES//ISM MOLECULES//ISM CLOUDS
10 24037 X RAYS ISM//X RAYS INDIVIDUAL 4U 1820 303//DUST EXTINCTION

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