On Milne–Barbier–Unsöld relationships
This short review aims to clarify upon the origins of so-called Eddington-Barbier relationships, which relate the emergent specific intensity and the flux to the photospheric source function at specific optical depths. Here we discuss the assumptions behind the original derivation of Barbier (1943)....
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| Format: | Article |
| Language: | English |
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De Gruyter
2018-04-01
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| Series: | Open Astronomy |
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| Online Access: | https://doi.org/10.1515/astro-2018-0018 |
| _version_ | 1818366497349697536 |
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| author | Paletou Frédéric |
| author_facet | Paletou Frédéric |
| author_sort | Paletou Frédéric |
| collection | DOAJ |
| description | This short review aims to clarify upon the origins of so-called Eddington-Barbier relationships, which relate the emergent specific intensity and the flux to the photospheric source function at specific optical depths. Here we discuss the assumptions behind the original derivation of Barbier (1943).We also point to the fact that Milne had already formulated these two relations in 1921. |
| first_indexed | 2024-12-13T22:37:06Z |
| format | Article |
| id | doaj.art-f2d47187a85c4ae6ac006e609924d6e1 |
| institution | Directory Open Access Journal |
| issn | 2543-6376 |
| language | English |
| last_indexed | 2024-12-13T22:37:06Z |
| publishDate | 2018-04-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Astronomy |
| spelling | doaj.art-f2d47187a85c4ae6ac006e609924d6e12022-12-21T23:28:57ZengDe GruyterOpen Astronomy2543-63762018-04-01271767910.1515/astro-2018-0018astro-2018-0018On Milne–Barbier–Unsöld relationshipsPaletou Frédéric0Université Paul Sabatier, Observatoire Midi–Pyrénées, Cnrs, Cnes, IRAP, F–31400 Toulouse, FranceThis short review aims to clarify upon the origins of so-called Eddington-Barbier relationships, which relate the emergent specific intensity and the flux to the photospheric source function at specific optical depths. Here we discuss the assumptions behind the original derivation of Barbier (1943).We also point to the fact that Milne had already formulated these two relations in 1921.https://doi.org/10.1515/astro-2018-0018radiative transferanalytical methodseducationhistory |
| spellingShingle | Paletou Frédéric On Milne–Barbier–Unsöld relationships Open Astronomy radiative transfer analytical methods education history |
| title | On Milne–Barbier–Unsöld relationships |
| title_full | On Milne–Barbier–Unsöld relationships |
| title_fullStr | On Milne–Barbier–Unsöld relationships |
| title_full_unstemmed | On Milne–Barbier–Unsöld relationships |
| title_short | On Milne–Barbier–Unsöld relationships |
| title_sort | on milne barbier unsold relationships |
| topic | radiative transfer analytical methods education history |
| url | https://doi.org/10.1515/astro-2018-0018 |
| work_keys_str_mv | AT paletoufrederic onmilnebarbierunsoldrelationships |