The Optical Appearance of Compact Stars: Shadows and Luminous Rings
In 2019, the direct imaging of M87* [1] by the Event Horizon Telescope opened the door to understand the nature of the central object and the underlying theory of gravity, since it explore the regions where the gravitational field is extremely strong. In the images obtained by the collaboration, we...
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| Vydané v: | Gravity, Cosmology, and Astrophysics Ročník 1022; s. 101 - 121 |
|---|---|
| Hlavný autor: | |
| Médium: | Kapitola |
| Jazyk: | English |
| Vydavateľské údaje: |
Switzerland
Springer
2023
Springer Nature Switzerland |
| Edícia: | Lecture Notes in Physics |
| ISBN: | 9783031420955, 3031420950 |
| ISSN: | 0075-8450, 1616-6361 |
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| Abstract | In 2019, the direct imaging of M87* [1] by the Event Horizon Telescope opened the door to understand the nature of the central object and the underlying theory of gravity, since it explore the regions where the gravitational field is extremely strong. In the images obtained by the collaboration, we can observe two distinct regions: a dark circular center called shadow and an enveloping luminous ring produced by the hot accretion disk surrounding the astrophysical object. In this chapter, we want to explain the basic tools to analyse the optical appearance of a compact object. Starting by the light bending near a massive body and the expected detected images when a star illuminates a black hole. Finally, we assume different models of accretions disks as well as the technique to obtain the similar images as the one obtained by the Einstein telescope. |
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| AbstractList | In 2019, the direct imaging of M87* [1] by the Event Horizon Telescope opened the door to understand the nature of the central object and the underlying theory of gravity, since it explore the regions where the gravitational field is extremely strong. In the images obtained by the collaboration, we can observe two distinct regions: a dark circular center called shadow and an enveloping luminous ring produced by the hot accretion disk surrounding the astrophysical object. In this chapter, we want to explain the basic tools to analyse the optical appearance of a compact object. Starting by the light bending near a massive body and the expected detected images when a star illuminates a black hole. Finally, we assume different models of accretions disks as well as the technique to obtain the similar images as the one obtained by the Einstein telescope. |
| Author | Guerrero, Merce |
| Author_xml | – sequence: 1 givenname: Merce surname: Guerrero fullname: Guerrero, Merce email: merguerr@ucm.es |
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| Copyright | The Author(s) 2023, Open Access This chapter is licensed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.The images or other third party material in this chapter are included in the chapter's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the chapter's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. |
| Copyright_xml | – notice: The Author(s) 2023, Open Access This chapter is licensed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.The images or other third party material in this chapter are included in the chapter's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the chapter's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. |
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| Notes | A correction to this publication are available online at https://doi.org/10.1007/978-3-031-42096-2_13 |
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| Title | The Optical Appearance of Compact Stars: Shadows and Luminous Rings |
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