Anúncio
O HARPS vê a luz do Sol pela primeira vez
17 de Maio de 2018
Em abril de 2018, uma equipa composta por cientistas e engenheiros do ESO e do Observatório de Genebra, na Suíça, deslocou-se ao Observatório de La Silla para pôr em funcionamento o HELIOS (HARPS Experiment for Light Integrated Over the Sun) [1]. Este instrumento inovador foi construído ao abrigo de um acordo entre o ESO, a Universidade de Genebra e o Centro de Astrofísica da Universidade do Porto [2].
O HELIOS é um telescópio solar que envia luz ao instrumento HARPS (High Accuracy Radial velocity Planet Searcher), montado no telescópio 3,6 metros do ESO. O HARPS é um dos caçadores de exoplanetas mais poderosos em existência e passa a maioria das noites a monitorizar estrelas à procura de minúsculos sinais que indiquem a presença de um exoplaneta. O HARPS apresenta uma precisão sem precedentes e gera regularmente resultados que constituirão verdadeiros desafios para os futuros telescópios, como por exemplo o Extremely Large Telescope do ESO.
O HELIOS será capaz de “alimentar” o HARPS com luz solar, o que permitirá realizar espectroscopia de alta precisão durante várias horas por dia [3]. Para além de nos ensinar mais sobre o Sol propriamente dito e, em particular, de fazer aumentar a nossa compreensão da atividade estelar (que é a principal limitação na deteção de exoplanetas do tipo da Terra com o HARPS), o projeto HELIOS levará a uma melhoria das técnicas de deteção de exoplanetas.
A enorme quantidade de dados obtidos pelo HELIOS levará à realização de investigação muito detalhada relativa aos diferentes efeitos instrumentais do HARPS e poderá também levar a melhorias na precisão do próprio HARPS. Esta informação poderá ser transferida e aplicada ao ESPRESSO (Echelle SPectrograph for Rocky Exoplanet and Stable Spectroscopic Observations), o sucessor do HARPS, montado no Very Large Telescope do ESO.
O projeto HELIOS decorrerá até ao final de 2022.
Notas
[1] A equipa era composta por Xavier Dumusque (Investigador Principal, Genebra), Pedro Figueira (co-Investigador Principal, ESO), François Wildi (engenheiro de sistemas, Genebra), Gaspare LoCurto (ESO), Thibault Pirson e Thibault Wildi (estudantes de engenharia).
[2] O projeto é liderado pela Universidade de Genebra, através do seu Observatório, e inclui como parceiro o Centro de Astrofísica da Universidade do Porto, através do Instituto de Astrofísica e Ciências do Espaço.
[3] A infraestrutura observacional HELIOS consiste numa lente que foca uma imagem do Sol numa esfera integrada. A radiação sai da esfera por uma fibra óptica de 30 metros ligada à unidade de calibração do HARPS. Todo o aparato encontra-se dentro de uma caixa resistente ao clima e à prova de água, encimada por uma cúpula de acrílico.
Links
- Informação adicional sobre o HARPS
Contactos
Xavier Dumusque
HELIOS Principal Investigator
University of Geneva
Geneva, Suíça
Email: Xavier.Dumusque@unige.ch
Richard Hook
ESO Public Information Officer
Garching bei München, Alemanha
Tel: +49 89 3200 6655
Telm: +49 151 1537 3591
Email: rhook@eso.org
Sobre o anúncio
| Id: | ann18033 |
Imagens
Our use of Cookies
We use cookies that are essential for accessing our websites and using our services. We also use cookies to analyse, measure and improve our websites’ performance, to enable content sharing via social media and to display media content hosted on third-party platforms.
ESO Cookies Policy
The European Organisation for Astronomical Research in the Southern Hemisphere (ESO) is the pre-eminent intergovernmental science and technology organisation in astronomy. It carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities for astronomy.
This Cookies Policy is intended to provide clarity by outlining the cookies used on the ESO public websites, their functions, the options you have for controlling them, and the ways you can contact us for additional details.
What are cookies?
Cookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials and preferences and enhance your browsing experience.
Categories of cookies we use
Essential cookies (always active): These cookies are strictly necessary for the proper functioning of our website. Without these cookies, the website cannot operate correctly, and certain services, such as logging in or accessing secure areas, may not be available; because they are essential for the website’s operation, they cannot be disabled.
Functional Cookies: These cookies enhance your browsing experience by enabling additional features and personalization, such as remembering your preferences and settings. While not strictly necessary for the website to function, they improve usability and convenience; these cookies are only placed if you provide your consent.
Analytics cookies: These cookies collect information about how visitors interact with our website, such as which pages are visited most often and how users navigate the site. This data helps us improve website performance, optimize content, and enhance the user experience; these cookies are only placed if you provide your consent. We use the following analytics cookies.
Matomo Cookies:
This website uses Matomo (formerly Piwik), an open source software which enables the statistical analysis of website visits. Matomo uses cookies (text files) which are saved on your computer and which allow us to analyze how you use our website. The website user information generated by the cookies will only be saved on the servers of our IT Department. We use this information to analyze www.eso.org visits and to prepare reports on website activities. These data will not be disclosed to third parties.
On behalf of ESO, Matomo will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage.
Matomo cookies settings:
Additional Third-party cookies on ESO websites: some of our pages display content from external providers, e.g. YouTube.
Such third-party services are outside of ESO control and may, at any time, change their terms of service, use of cookies, etc.
YouTube: Some videos on the ESO website are embedded from ESO’s official YouTube channel. We have enabled YouTube’s privacy-enhanced mode, meaning that no cookies are set unless the user actively clicks on the video to play it. Additionally, in this mode, YouTube does not store any personally identifiable cookie data for embedded video playbacks. For more details, please refer to YouTube’s embedding videos information page.
Cookies can also be classified based on the following elements.
Regarding the domain, there are:
- First-party cookies, set by the website you are currently visiting. They are stored by the same domain that you are browsing and are used to enhance your experience on that site;
- Third-party cookies, set by a domain other than the one you are currently visiting.
As for their duration, cookies can be:
- Browser-session cookies, which are deleted when the user closes the browser;
- Stored cookies, which stay on the user's device for a predetermined period of time.
How to manage cookies
Cookie settings: You can modify your cookie choices for the ESO webpages at any time by clicking on the link Cookie settings at the bottom of any page.
In your browser: If you wish to delete cookies or instruct your browser to delete or block cookies by default, please visit the help pages of your browser:
Please be aware that if you delete or decline cookies, certain functionalities of our website may be not be available and your browsing experience may be affected.
You can set most browsers to prevent any cookies being placed on your device, but you may then have to manually adjust some preferences every time you visit a site/page. And some services and functionalities may not work properly at all (e.g. profile logging-in, shop check out).
Updates to the ESO Cookies Policy
The ESO Cookies Policy may be subject to future updates, which will be made available on this page.
Additional information
For any queries related to cookies, please contact: pdprATesoDOTorg.
As ESO public webpages are managed by our Department of Communication, your questions will be dealt with the support of the said Department.