Rotation Curve of the Milky Way and the Dark Matter Density
We review the current status of the study of rotation curve (RC) of the Milky Way, and present a unified RC from the Galactic Center to the galacto-centric distance of about 100 kpc. The RC is used to directly calculate the distribution of the surface mass density (SMD). We then propose a method to...
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| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
MDPI AG
2020-04-01
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| Серія: | Galaxies |
| Предмети: | |
| Онлайн доступ: | https://www.mdpi.com/2075-4434/8/2/37 |
| _version_ | 1827717816490393600 |
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| author | Yoshiaki Sofue |
| author_facet | Yoshiaki Sofue |
| author_sort | Yoshiaki Sofue |
| collection | DOAJ |
| description | We review the current status of the study of rotation curve (RC) of the Milky Way, and present a unified RC from the Galactic Center to the galacto-centric distance of about 100 kpc. The RC is used to directly calculate the distribution of the surface mass density (SMD). We then propose a method to derive the distribution of dark matter (DM) density in the in the Milky Way using the SMD distribution. The best-fit dark halo profile yielded a local DM density of <inline-formula> <math display="inline"> <semantics> <mrow> <msub> <mi>ρ</mi> <mo>⊙</mo> </msub> <mo>=</mo> <mn>0.36</mn> <mo>±</mo> <mn>0.02</mn> </mrow> </semantics> </math> </inline-formula> GeV cm<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mrow> <mo>−</mo> <mn>3</mn> </mrow> </msup> </semantics> </math> </inline-formula> . We also review the estimations of the local DM density in the last decade, and show that the value is converging to a value at <inline-formula> <math display="inline"> <semantics> <mrow> <msub> <mi>ρ</mi> <mo>⊙</mo> </msub> <mo>=</mo> <mn>0.39</mn> <mo>±</mo> <mn>0.09</mn> </mrow> </semantics> </math> </inline-formula> GeV cm<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mrow> <mo>−</mo> <mn>3</mn> </mrow> </msup> </semantics> </math> </inline-formula> . |
| first_indexed | 2024-03-10T20:09:45Z |
| format | Article |
| id | doaj.art-b2bb3f7bd1bc413c9051aad177dd901b |
| institution | Directory Open Access Journal |
| issn | 2075-4434 |
| language | English |
| last_indexed | 2024-03-10T20:09:45Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Galaxies |
| spelling | doaj.art-b2bb3f7bd1bc413c9051aad177dd901b2023-11-19T23:00:37ZengMDPI AGGalaxies2075-44342020-04-01823710.3390/galaxies8020037Rotation Curve of the Milky Way and the Dark Matter DensityYoshiaki Sofue0Institute of Astronomy, Graduate School of Sciences, The University of Tokyo, Mitaka, Tokyo 181-0015, JapanWe review the current status of the study of rotation curve (RC) of the Milky Way, and present a unified RC from the Galactic Center to the galacto-centric distance of about 100 kpc. The RC is used to directly calculate the distribution of the surface mass density (SMD). We then propose a method to derive the distribution of dark matter (DM) density in the in the Milky Way using the SMD distribution. The best-fit dark halo profile yielded a local DM density of <inline-formula> <math display="inline"> <semantics> <mrow> <msub> <mi>ρ</mi> <mo>⊙</mo> </msub> <mo>=</mo> <mn>0.36</mn> <mo>±</mo> <mn>0.02</mn> </mrow> </semantics> </math> </inline-formula> GeV cm<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mrow> <mo>−</mo> <mn>3</mn> </mrow> </msup> </semantics> </math> </inline-formula> . We also review the estimations of the local DM density in the last decade, and show that the value is converging to a value at <inline-formula> <math display="inline"> <semantics> <mrow> <msub> <mi>ρ</mi> <mo>⊙</mo> </msub> <mo>=</mo> <mn>0.39</mn> <mo>±</mo> <mn>0.09</mn> </mrow> </semantics> </math> </inline-formula> GeV cm<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mrow> <mo>−</mo> <mn>3</mn> </mrow> </msup> </semantics> </math> </inline-formula> .https://www.mdpi.com/2075-4434/8/2/37galaxiesDM—galaxiesindividual (Milky Way)—galaxiesrotation curve |
| spellingShingle | Yoshiaki Sofue Rotation Curve of the Milky Way and the Dark Matter Density Galaxies galaxies DM—galaxies individual (Milky Way)—galaxies rotation curve |
| title | Rotation Curve of the Milky Way and the Dark Matter Density |
| title_full | Rotation Curve of the Milky Way and the Dark Matter Density |
| title_fullStr | Rotation Curve of the Milky Way and the Dark Matter Density |
| title_full_unstemmed | Rotation Curve of the Milky Way and the Dark Matter Density |
| title_short | Rotation Curve of the Milky Way and the Dark Matter Density |
| title_sort | rotation curve of the milky way and the dark matter density |
| topic | galaxies DM—galaxies individual (Milky Way)—galaxies rotation curve |
| url | https://www.mdpi.com/2075-4434/8/2/37 |
| work_keys_str_mv | AT yoshiakisofue rotationcurveofthemilkywayandthedarkmatterdensity |