Un estudio internacional liderado por el Consejo Superior de Investigaciones Científicas (CSIC) ha confirmado la existencia del magnetar (estrella de neutrones de campo magnético muy intenso) anómalo más antiguo y más débil conocido hasta ahora.

Los detalles de este cuerpo celeste, denominado SGR 0418+5729, se publican en la revista The Astrophysical Journal, y aportan información que podría ayudar a comprender la evolución de las estrellas de neutrones y las explosiones de supernovas.
La confirmación de SGR 0418+5729 como magnetar anómalo -menos energía en su núcleo que otros magnetares- ha sido posible gracias a la observación obtenida durante tres años por los telescopios espaciales Chandra, XMM Newton, RXTE y Swift, de la Agencia Espacial Europea (ESA) y la Agencia Espacial Estadounidense (NASA).
"Se han necesitado las observaciones de tantos instrumentos espaciales porque para medir el campo magnético con alta precisión se necesita obtener observaciones durante muchos años y de forma muy regular", ha subrayado el investigador del CSIC en el Instituto de Ciencias del Espacio Alessandro Papitto.
Este magnetar, detectado en 2010, presenta las erupciones violentas y repentinas en altas energías típicas de un magnetar clásico pero tiene un campo magnético mucho más débil.
"La debilidad de su campo magnético nos ha permitido estimar la edad de este objeto en unos 550.000 años, lo que lo convierte en el más antiguo de los conocidos hasta el momento", ha señalado Nanda Rea, también del Instituto de Ciencias del Espacio.
Los magnetares son estrellas de neutrones que poseen campos magnéticos muy intensos, unas 1.000 veces más que los radio púlsares, cuya intensidad es, a su vez, miles de millones de veces mayor que la del Sol.
Nacidas de las explosiones de supernovas, las estrellas de neutrones se caracterizan por rotar a gran velocidad y tener una masa un poco mayor que la del Sol pero concentrada en un radio de unos 10 kilómetros aproximadamente.
Su edad se determina a partir de la velocidad de rotación ya que a medida que evolucionan van girando más lentamente.
El magnetar anómalo SGR 0418+5729 fue el primero que la comunidad científica detectó, si bien sus detalles se han conocido ahora.
El pasado año el CSIC publicó en la misma revista los detalles del segundo magnetar de esta tipología hallado.

2 التعليقات Blogger 2 Facebook

  1. Synthetic urine has been increasingly popular in recent years as a way to pass a drug test, and this trend is expected to continue. You may rapidly pass a drug test by substituting fake urine for your own. It does not matter if you consumed marijuana 20 days ago or 20 minutes ago, the synthetic pee will be analyzed, not your own. It is easy to see why synthetic urine is so popular, as it is the quickest and sneakiest way to pass a drug test. It will remove chlorine, buildup, chemical substances, and hard water minerals gently. This makes use of advanced microsphere technology, which ensures that metabolites are released gradually.

    ResponderEliminar
  2. The price is 2248, source. This detox kit company has been providing detox solutions for over 20 years. People often turn to these products to help flush their system of drugs. PassYourTest is popular for its natural solutions such as the 5 Day Detoxification Program. Some of the most popular products from PassYourTest include: • Same Day Detoxification Cleanse: This option is for those of you who are looking for a very quick solution. This product is suitable for people who have heavy to extreme exposure to a substance. The product comes in capsule or liquid form and works in 90 minutes. That said, clean results will only last for about 6 hours, so you'll have to be mindful of your timing. It's also important to abstain from all toxins before taking the cleanser. • 5 Day Day Detoxification Cleanse: This option is great if you have a bit of notice before your test. The 5 Day Detox program comes with multiple supplements that you'll take over the course of five days. The kit also comes with a meal plan, two home testing kits, and customer support. • 10 Day Detoxification Cleanse: This is the most effective option, but it will require some serious forward planning on your part. This program comes with several capsules that are taken over the 10-day course to lower your toxin levels. Like the 5 Day Cleanse, this program comes with a meal planning booklet, customer support, and three home tests. • Cleansing Shampoo Treatment: If you know you have a hair test coming up, this treatment can help take the toxins out of your hair before a drug test. This can be helped to ensure that the hair sample provided doesn't test positive for drugs. The treatment takes about an hour to work and lasts for 24 hours after use. If you're not certain which detox program is right for you, fill out the product questionnaire on the homepage of the site. This will help guide you to find the specific product that's right for your needs. Remember, for any of these methods to be effective, it's best to drink lots of water and abstain from drugs for as much time as possible before the test. Aside from detox kits, there are a few other ways that can help you pass a drug test. All of these options can be used to lower THC and toxin levels in your body before testing. That said, it's smart to abstain from the drug before the test for the best results. Keep in mind that any solution that involves dilution of your urine can lead to problems. Most medical labs are trained to look for false positive tests. If dilution is apparent in any urine samples, the test will be retaken, even if no drugs are detectable. Some ways to lower the toxin level before a drug test include: • Take a break: This one may seem obvious, but it must be mentioned. Taking a break from marijuana and other drugs is the only sure-fire way to pass your drug test. When you start looking for jobs, it's smart to abstain from any drugs so that you're ready for potential drug tests. Of course, this is an ideal solution.

    ResponderEliminar

 
AFICIONADO © 2013. All Rights Reserved. Powered by Blogger
Top