| current sheet | 254 | 23 | 9.364 | 0.005022 | 2001.00868,2001.01993,etc |
| convection zone | 204 | 18 | 11.941 | 0.004262 | 2001.01085,2001.02572,etc |
| rotation curve | 176 | 35 | 5.147 | 0.004214 | 2001.00318,2001.00421,etc |
| calibration error | 49 | 11 | 4.8 | 0.004173 | 2001.01892,2001.02111,etc |
| Gaia DR2 | 79 | 30 | 2.621 | 0.004163 | 2001.00125,2001.00860,etc |
| aspect ratio | 77 | 19 | 4.222 | 0.004066 | 2001.00754,2001.02473,etc |
| flux tube | 170 | 17 | 10.375 | 0.00395 | 2001.00289,2001.00868,etc |
| convective core | 78 | 12 | 7.0 | 0.003931 | 2001.01839,2001.02662,etc |
| radio galaxy | 110 | 29 | 3.357 | 0.003929 | 2001.00099,2001.00506,etc |
| pitch angle | 135 | 12 | 12.091 | 0.003916 | 2001.00855,2001.00868,etc |
| galaxy cluster | 300 | 71 | 4.271 | 0.003783 | 2001.00506,2001.00827,etc |
| short GRBs | 63 | 11 | 6.2 | 0.00364 | 2001.00205,2001.00648,etc |
| gravitational mass | 56 | 13 | 4.333 | 0.003616 | 2001.00506,2001.01746,etc |
| gas fraction | 126 | 23 | 5.636 | 0.003558 | 2001.00055,2001.00099,etc |
| stellar mass function | 124 | 23 | 5.591 | 0.003465 | 2001.00018,2001.00431,etc |
| open cluster | 143 | 30 | 4.828 | 0.00341 | 2001.00261,2001.00369,etc |
| expansion history | 37 | 13 | 2.917 | 0.003405 | 2001.02283,2001.02947,etc |
| mass segregation | 28 | 11 | 2.7 | 0.003386 | 2001.01025,2001.01450,etc |
| spectral evolution | 63 | 20 | 3.263 | 0.003365 | 2001.00648,2001.00723,etc |
| extinction curve | 111 | 20 | 5.789 | 0.003333 | 2001.00402,2001.01839,etc |
| rotational modulation | 69 | 12 | 6.091 | 0.003309 | 2001.00952,2001.01093,etc |
| effective mass | 79 | 16 | 4.867 | 0.003286 | 2001.02193,2001.04895,etc |
| maximum light | 96 | 17 | 5.938 | 0.003182 | 2001.00587,2001.00598,etc |
| broad component | 118 | 18 | 6.647 | 0.003181 | 2001.00099,2001.00601,etc |
| time delay | 202 | 56 | 3.564 | 0.003103 | 2001.00675,2001.00755,etc |
| SNe Ia | 314 | 22 | 14.714 | 0.003075 | 2001.00587,2001.00598,etc |
| power spectrum | 778 | 129 | 5.969 | 0.003067 | 2001.00584,2001.00833,etc |
| electric field | 178 | 41 | 4.375 | 0.003055 | 2001.00289,2001.00868,etc |
| phase angle | 44 | 13 | 3.417 | 0.003037 | 2001.00955,2001.01093,etc |
| free energy | 78 | 11 | 7.5 | 0.003009 | 2001.02732,2001.03721,etc |
| attenuation curve | 77 | 11 | 7.6 | 0.003005 | 2001.00402,2001.01968,etc |
| vector field | 61 | 14 | 3.538 | 0.002894 | 2001.00409,2001.00868,etc |
| magnetic field | 1925 | 281 | 6.871 | 0.002887 | 2001.00177,2001.00194,etc |
| molecular cloud | 294 | 67 | 4.303 | 0.00288 | 2001.00217,2001.00318,etc |
| habitable zone | 126 | 16 | 6.6 | 0.002856 | 2001.00049,2001.00050,etc |
| solar wind | 156 | 26 | 6.04 | 0.002844 | 2001.00868,2001.01993,etc |
| short gamma-ray burst | 32 | 11 | 2.9 | 0.002817 | 2001.00588,2001.00950,etc |
| merger rate | 130 | 25 | 5.375 | 0.002801 | 2001.01025,2001.01135,etc |
| harmonic oscillator | 41 | 13 | 3.333 | 0.002705 | 2001.00717,2001.00952,etc |
| neutrino mass | 97 | 19 | 5.333 | 0.002705 | 2001.02230,2001.04876,etc |
| halo mass | 589 | 77 | 7.592 | 0.002676 | 2001.00318,2001.00601,etc |
| event rate | 94 | 25 | 3.875 | 0.002661 | 2001.00205,2001.01241,etc |
| black hole | 1113 | 233 | 4.724 | 0.002651 | 2001.00133,2001.00194,etc |
| narrow line | 45 | 22 | 2.095 | 0.002579 | 2001.01967,2001.02242,etc |
| stellar halo | 124 | 18 | 4.882 | 0.002566 | 2001.00931,2001.01670,etc |
| Solar System | 136 | 44 | 3.023 | 0.002565 | 2001.00055,2001.00085,etc |
| disk size | 52 | 12 | 4.636 | 0.002559 | 2001.01409,2001.01970,etc |
| response function | 98 | 18 | 5.706 | 0.002552 | 2001.00508,2001.02211,etc |
| phase transition | 104 | 35 | 3.029 | 0.00255 | 2001.00409,2001.01590,etc |
| light curve | 1482 | 182 | 8.133 | 0.002523 | 2001.00148,2001.00239,etc |
| mass accretion rate | 144 | 43 | 3.405 | 0.002521 | 2001.00369,2001.00713,etc |
| neutrino emission | 59 | 22 | 2.714 | 0.002511 | 2001.00566,2001.00922,etc |
| small body | 84 | 12 | 7.545 | 0.002493 | 2001.00125,2001.01482,etc |
| hard state | 61 | 13 | 4.833 | 0.002493 | 2001.00716,2001.01732,etc |
| star cluster | 201 | 55 | 3.704 | 0.002459 | 2001.00838,2001.01450,etc |
| polarization angle | 64 | 18 | 3.706 | 0.002434 | 2001.00675,2001.00721,etc |
| low state | 69 | 22 | 3.238 | 0.002413 | 2001.00642,2001.00827,etc |
| galactocentric distance | 44 | 18 | 2.412 | 0.002396 | 2001.01529,2001.01670,etc |
| gravitational redshift | 29 | 14 | 2.154 | 0.002365 | 2001.02193,2001.03594,etc |
| dark matter | 802 | 182 | 4.42 | 0.002351 | 2001.00318,2001.00331,etc |
| X-ray burst | 45 | 11 | 4.4 | 0.002351 | 2001.00716,2001.01032,etc |
| mass ejection | 74 | 11 | 7.3 | 0.002329 | 2001.01250,2001.04467,etc |
| stellar mass | 1673 | 261 | 6.431 | 0.0023 | 2001.00018,2001.00050,etc |
| spiral arm | 290 | 56 | 5.236 | 0.0023 | 2001.00168,2001.00197,etc |
| dark energy equation | 50 | 17 | 3.062 | 0.002295 | 2001.02180,2001.03176,etc |
| solar activity | 85 | 24 | 3.652 | 0.002244 | 2001.00868,2001.01093,etc |
| redshift space | 75 | 20 | 3.842 | 0.002235 | 2001.00584,2001.02230,etc |
| tidal deformability | 63 | 13 | 5.167 | 0.002235 | 2001.01892,2001.04474,etc |
| photoionization model | 47 | 11 | 4.4 | 0.002222 | 2001.00099,2001.03086,etc |
| baryonic mass | 43 | 14 | 3.231 | 0.002211 | 2001.00318,2001.00800,etc |
| binary fraction | 118 | 15 | 8.357 | 0.002193 | 2001.01420,2001.01670,etc |
| Standard Model | 88 | 32 | 2.774 | 0.002193 | 2001.02193,2001.02536,etc |
| Faraday rotation | 42 | 11 | 4.1 | 0.002189 | 2001.00903,2001.01753,etc |
| gauge transformation | 48 | 11 | 4.7 | 0.002174 | 2001.03120,2001.04302,etc |
| radio jet | 80 | 23 | 3.545 | 0.002156 | 2001.00099,2001.00506,etc |
| multiple image | 51 | 13 | 4.167 | 0.002124 | 2001.00261,2001.01135,etc |
| quiescent galaxy | 71 | 14 | 4.154 | 0.002122 | 2001.00877,2001.01025,etc |
| energy spectrum | 189 | 61 | 3.133 | 0.0021 | 2001.00409,2001.00768,etc |
| angular momentum loss | 51 | 13 | 4.167 | 0.002089 | 2001.01032,2001.01967,etc |
| soft state | 61 | 11 | 5.9 | 0.002068 | 2001.00713,2001.00716,etc |
| neutron star | 626 | 156 | 3.987 | 0.002035 | 2001.00261,2001.00289,etc |
| radio source | 144 | 38 | 3.865 | 0.002035 | 2001.00506,2001.00591,etc |
| radiative loss | 38 | 12 | 3.364 | 0.002033 | 2001.01250,2001.02009,etc |
| photometric redshift | 133 | 35 | 3.882 | 0.002019 | 2001.00402,2001.00584,etc |
| spiral structure | 119 | 24 | 5.043 | 0.002014 | 2001.00197,2001.00868,etc |
| linear bias | 28 | 12 | 2.455 | 0.002002 | 2001.00833,2001.02230,etc |
| scalar field | 287 | 56 | 5.0 | 0.001992 | 2001.00584,2001.01743,etc |
| radio burst | 74 | 20 | 3.737 | 0.001982 | 2001.02007,2001.02100,etc |
| Milky Way | 691 | 202 | 3.433 | 0.001981 | 2001.00168,2001.00261,etc |
| initial datum | 50 | 15 | 3.5 | 0.001975 | 2001.01927,2001.02916,etc |
| nuclear reaction | 47 | 15 | 3.071 | 0.001965 | 2001.02341,2001.02662,etc |
| local measurement | 26 | 12 | 2.273 | 0.001964 | 2001.00695,2001.02451,etc |
| rise time | 117 | 23 | 5.273 | 0.001961 | 2001.00506,2001.00598,etc |
| rotation period | 232 | 53 | 4.288 | 0.001947 | 2001.00125,2001.00239,etc |
| Paper I | 331 | 38 | 8.838 | 0.00194 | 2001.00598,2001.00949,etc |
| source count | 36 | 13 | 2.75 | 0.001938 | 2001.00879,2001.02358,etc |
| tensor perturbation | 83 | 16 | 5.467 | 0.001922 | 2001.00409,2001.03879,etc |
| gravitational wave | 299 | 120 | 2.504 | 0.001917 | 2001.00205,2001.00409,etc |
| high-energy neutrino | 37 | 11 | 3.5 | 0.001914 | 2001.00205,2001.00930,etc |
| accretion shock | 44 | 13 | 3.583 | 0.001902 | 2001.00197,2001.00217,etc |
|