Ritmo espacial: un agujero negro como reloj universal
Un equipo científico internacional liderado por el Centro de Astrobiología (CAB, CSIC-INTA) ha descubierto la variabilidad sin precedentes de la emisión de rayos X procedente del agujero negro situado en el núcleo de una galaxia activa (AGN). El nuevo fenómeno, acuñado como ‘erupciones cuasi-periódicas» (QPEs), ayudará a comprender algunos aspectos desconcertantes de la acreción de los agujeros negros.
La emisión de rayos X procedente del núcleo de GSN 069, una galaxia a unos 250 millones de años luz de la Tierra, se detectó por primera vez en el verano de 2010 durante una observación del telescopio espacial XMM-Newton de la Agencia Espacial Europea (ESA).
Desde ese año, los observatorios de rayos X XMM-Newton y Neil Gehrels Swift (NASA) han seguido observando la evolución de la emisión de GSN 069, constatando que ha ido decayendo lentamente con el tiempo, lo que sería consistente con la repentina destrucción de una estrella (probablemente una gigante) que se acercó demasiado y fue reforzada por las intensas fuerzas de marea del agujero negro, lo que se conoce como un ‘evento de disrupción de marea’.
Como señala Giovanni Miniutti, investigador del Centro de Astrobiología y autor principal del presente estudio, “aunque pudiera haber otras posibles explicaciones, sospechamos que ese estallido de rayos X de 2010 fue debido a la destrucción de una estrella en el núcleo de GSN 069; y el posterior decaimiento de la emisión, al acrecimiento de los restos de la estrella hacia el agujero negro central”. Los datos del estudio indican que se trata de un agujero negro con una masa de unas cien mil millones de veces la masa del Sol.
Aunque la observación de este tipo de eventos sea de gran importancia para estudiar en detalle los fenómenos de acreción (la adición de masa a partir de materia circundante) en los agujeros negros, la galaxia GSN 069 escondía todavía una inesperada sopresa para los investigadores.
Lo que ha descubierto recientemente el equipo de Miniutti y que ha sido publicado en la revista Nature, es un nuevo y espectacular fenómeno que está ocurriendo en GSN 069. En la víspera de Navidad de 2018, XMM-Newton detectó unas enormes erupciones de rayos X que se repetían, algo que nunca se había visto en galaxias activas. Durante estas erupciones ‘cuasi-periódicas’ (o QPEs, Quasi Periodic Eruptions), término acuñado por los autores, la emisión de rayos X de GSN 069 aumentaba en un factor de cien durante aproximadamente una hora, y el fenómeno se repetía cada 9 horas.
Dado el enorme interés del descubrimiento se realizaron de nuevo observaciones con los telescopios XMM-Newton y Chandra (NASA) en enero y febrero de 2019, que confirmaron que las erupciones se mantenían, al menos durante un par de meses.
Este extraordinario evento, observado por primera vez, permitirá mejorar la comprensión sobre algunos de los aspectos más desconcertantes asociados con la acreción de los agujeros negros.
Las erupciones cuasi periódicas de GSN 069 son un fenómeno tan nuevo que su origen físico necesita ser identificado todavía.
El equipo GSN 069 es una colaboración internacional liderada por el Centro de Astrobiología y con la participación de instituciones de España, EEUU, Reino Unido, Sudáfrica, Francia, Australia y Bélgica. El equipo utilizó datos astronómicos de los observatorios de rayos X SMM-Newton, Chandra y Neil Gehrel Swift, el Telescopio Espacial Hubble, el Karl G. Jansky Very Large Array (VLA), el Australia Telescope Compact Array (ACTA) y los radiotelescopios sudafricanos MeerKAT.
I quite like reading through a post that will make people think.
Also, many thanks for allowing me to comment!
카지노사이트추천
You made some good points there. I did a Google search about the topic and found most people will believe your blog. 메이저사이트
I’ve been surfing for articles that might be helpful to me for a while. I’ve been searching for information for hours but couldn’t find it. But this article has been very helpful to me. I think this is a really valuable and useful article. I have added it to my bookmarks, and I will visit often to subscribe.
토토사이트 모음
It’s a really interesting topic and it has helped me a lot. In fact, I also run a website with similar content to your posting. Please visit once 바카라검증사이트
bb
Try Free Slots. pgslot-games.com
Try Free Slots. pgslot-games.co
برای خردی قفس کبک و مرغ به سایت پراورصنعت مراجعه کنید
لینک سایت پراور صنعت https://paravarsanat.com
It proved to be Very helpful to me and I am sure to all the commentators here canaan avalon 1246
Entertainment can be more fun with Hulu as here you get access to a world full of your favorite TV shows. Here will get the opportunity to enjoy the latest content that you can stream in any of your devices supporting the app. Get your free trial and access to your device in the Nice Post . you make running a blog glance easy. The full look of your site is fantastic, as neatly as the content material! this will help me to create my own blog. if you dont mind can you give me an advice? thanks alot!!! This is my first opportunity to visit this website. I found some interesting things and I will apply to the development of my blog. Thanks for sharing useful information. 바카라사이트
Entertainment can be more fun with Hulu as here you get access to a world full of your favorite TV shows. Here will get the opportunity to enjoy the latest content that you can stream in any of your devices supporting the app. Get your free trial and access to your device in the Nice Post . you make running a blog glance easy. The full look of your site is fantastic, as neatly as the content material! this will help me to create my own blog. if you dont mind can you give me an advice? thanks alot!!! This is my first opportunity to visit this website. I found some interesting things and I will apply to the development of my blog. Thanks for sharing useful information.
I wish more authors of this type of content would take the time you did to research and write so well. I am very impressed with your vision and insight. I have added and shared your site to my social media accounts to send people back to your site because I am sure they will find it extremely helpful too. This is such a great resource that you are providing and you give it away for free. I love seeing blog that understand the value of providing a quality resource for free. 바카라사이트
Hey, this day is too much good for me, since this time I am reading this enormous informative article here at my home. Thanks a lot for massive hard work. All the contents you mentioned in post is too good and can be very useful. I will keep it in mind, thanks for sharing the information keep updating, looking forward for more posts.Thanks .Please do keep up the great work. I cannot be without visiting your blog again and again. 토토사이트추천
I wish more authors of this type of content would take the time you did to research and write so well. I am very impressed with your vision and insight. I have added and shared your site to my social media accounts to send people back to your site because I am sure they will find it extremely helpful too. This is such a great resource that you are providing and you give it away for free. I love seeing blog that understand the value of providing a quality resource for free.
Free MP3 Music Search and Download by Genre, Artist, or Title. Download or Listen Online to Top Artists and Songs. Free music download! American best hits and biggest catalog. Stream and download high-quality mp3 and listen to popular playlists.
Which is some inspirational stuff. Never knew that opinions might be this varied. Thank you for all the enthusiasm to provide such helpful information here. 온라인바카라
xz
It has fully emerged to crown Singapore’s southern shores and undoubtedly placed her on the global map of residential landmarks. I still scored the more points than I ever have in a season for GS. I think you would be hard pressed to find somebody with the same consistency I have had over the years so I am happy with that. 메이저토토사이트
«I like to look at an article that makes individuals think. 토토사이트
Besides, thank you for allowing me to remark!»
I had a lot of fun at this Olympics, but something was missing. I hope there’s an audience next time.안전토토사이트
xvc
thank you for this article
«Directly following exploring a piece of the blog articles on your webpage page, I genuinely like your method 토토사이트
of adding to a blog. I saved it to my bookmark site rundown and will get back soon.
In the event that not all total irritation, visit my site likewise and notice to me your perspective.»
Fabulous! This is just amazing! Not just high quality, however additionally valuable info. And that is rare to come by nowadays!
Great site. A lot of helpful info here.
Hello! This post could not be written any better!
This was an extremely nice post.
Hard to ignore such an amazing article like this.
Your blog is really nice and really on point
Great write-up, I totally agree with what you said. Thank you for leaving comments. I think more people should see the comments you wrote.
Thank you for sharing such a great bog it is very helpful.
https://www.bacarasite.com
I have read it, but the information is still less than mine, i am wanting to learn more
https://www.sportstoto365.com
It’s a very useful article. Very useful for everyone Hope you all read these stories.
I imagine so. Very good stuff, I agree totally.
Obrigada por compartilhar esta informação!
There is a lot of misunderstanding about these issues today. Your material helps explain things.
Our communities really need to deal with this.
I have been curious about these trends, and you have really helped me. I have just told a few of my friends about this on FaceBook and they love your content just as much as I do.
I have been curious about these trends, and you have really helped me. I have just told a few of my friends about this on FaceBook and they love your content just as much as I do.
مل بت فارسی
سایت شرط بندی هتریک
دانلود هتریک بت
سایت شرط بندی بت فوروارد ، بهترین و برترین سایت پیش بینی و بتینگ فارسی ایرانی است و از قوی ترین های حوضه شرط بندی به حساب می آید.
اپلیکیشن بت فوروارد
بت فیدو همواره برای مشتریان خود از سال 2013 ارزش قائل بوده و تمامی امکانات مورد نیاز را برای یک سایت تکمیل شرط بندی و پیش بینی فراهم نموده است.
سایت بت فیدو
آی آر بت 365 بهترین فرصت ها را برای افزایش شانس برنده شدن شما در پیش بینی های مختلف و متنوع ورزشی دراختیارتان قرار می دهد.
آی آر بت 365 ثبت نام
سایت شرط بندی بت فلاد دارای یکی از قوی ترین اسکریپت های شرط بندی است که تا به امروز برای یک سایت شرط بندی ارائه شده است.
بت فلاد
سایت رویس بت
سایت تاک تیک یک سایت شرط بندی برای پیش بینی فوتبال و بازی کردن در کازینو های آنلاین یا بازی های مجازی کازینویی است که مورد استفاده ایرانیان و فارسی زبانان است.
سایت تاک تیک بت
مارک بت نماد اعتبار و پیشتازی خود را در دنیای شرط بندی فارسی ایرانی ثابت کرده است.
دانلود اپلیکیشن مارک بت
تهران بت فعالیت خود را از سال 1393 با یک سایت کاملا دستی و غیر اتوماتیک آغاز کرد.
سایت تهران بت
Damn it, the pendulum is a shocking blog.Wow, I need you to give me some advice on how to operate it. I’m just getting started, so there’s a lot to be desired 안전토토사이트
I think a lot of articles related to are disappearing someday. That’s why it’s very hard to find, but I’m very fortunate to read your writing. When you come to my site, I have collected articles related to 😀 먹튀검증
Tanks For Sharing… I am From Indonesia… Good Job Mr.
My Web: DISTRIBUTOR, SUPPLYER BURNER FBR BAHAN BAKAR GAS
Selamat malam Salam Kenal Mr. I am From Indonesia Supplay Steam Boiler Vertical Lokal 500 Kg-1Ton/h