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Survey of rotation curves for northern spiral edge-on galaxies
Astrophysics · Submitted 12 Jun 2000
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The rotation curve amplitude shows close correlation with a width of the HI line.
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The abstract, sentence by sentence
Rotational curves are measured for almost complete sample of 308 northern spiral galaxies using the 6-m telescope. For observations we selected edge-on galaxies from RFGC catalog with apparent axial ratio a/b>8, angular diameter a<2', and declinations delta>+38deg above the Arecibo belt. About 97% of the galaxies are detected in the H-alpha line. For them a typical rotation curve extends till 87% of the standard galaxy radius. The rotation curve amplitude shows close correlation with a width of the HI line. The median radial velocity for the galaxies is 7800 km/sec, and the median maximum of the rotation curves is 137 km/s. These new observational data will be used to study cosmic streamings of galaxies seen on a scale of 200 Mpc.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Rotational curves are measured for almost complete sample of 308 northern spiral galaxies using the 6-m telescope. | contribution 0.83 | 0.94 | 0.07 | asserted 1.00 |
| s1 | For observations we selected edge-on galaxies from RFGC catalog with apparent axial ratio a/b>8, angular diameter a<2', and declinations delta>+38deg above the Arecibo belt. | method 1.00 | 0.84 | 0.02 | asserted 0.99 |
| s2 | About 97% of the galaxies are detected in the H-alpha line. | result 0.93 | 0.90 | 0.03 | asserted 1.00 |
| s3 | For them a typical rotation curve extends till 87% of the standard galaxy radius. | result 0.99 | 0.90 | 0.07 | asserted 1.00 |
| s4 | The rotation curve amplitude shows close correlation with a width of the HI line. | result 1.00 | 0.89 | 0.18 | asserted 1.00 |
| s5 | The median radial velocity for the galaxies is 7800 km/sec, and the median maximum of the rotation curves is 137 km/s. | result 1.00 | 0.93 | 0.10 | asserted 1.00 |
| s6 | These new observational data will be used to study cosmic streamings of galaxies seen on a scale of 200 Mpc. | future work 1.00 | 0.19 | 0.14 | asserted 0.77 |
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Original abstract
Rotational curves are measured for almost complete sample of 308 northern spiral galaxies using the 6-m telescope. For observations we selected edge-on galaxies from RFGC catalog with apparent axial ratio a/b>8, angular diameter a<2', and declinations delta>+38deg above the Arecibo belt. About 97% of the galaxies are detected in the H-alpha line. For them a typical rotation curve extends till 87% of the standard galaxy radius. The rotation curve amplitude shows close correlation with a width of the HI line. The median radial velocity for the galaxies is 7800 km/sec, and the median maximum of the rotation curves is 137 km/s. These new observational data will be used to study cosmic streamings of galaxies seen on a scale of 200 Mpc.
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