Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2018        Go!    
 
 
June 21, Thursday 2018 6:00 AM       

       HEADLINES: Cheriyan Philip to be Mission coordinator                                              Chengannur by-election: Congress man arrested for spreading controversial phone message                                              Agri budget to double farm income by 2022: PM Modi                                              Governor's rule imposed in J-K                                              18K banks, post offices have Aadhaar facility: UIDAI                                              Swaraj discusses bilateral trade, investment with Luxembourg PM                                              India dismisses UN report branding terrorists as "leaders"                                              China 'colonising' terror-supporting Pak - EFSAS                                              My hardest day in cricket: Paine post England drubbing                                              Kaumudi Facebook
       SCI&TECH Next Article: Coconut sized tumor removed from Iraqi woman's head  
       New, rare galaxy spotted over 359 mln light-years away
 
         Posted on :15:51:09 Jan 4, 2017
   
A A
       Last edited on:15:51:09 Jan 4, 2017
         Tags: New, rare galaxy, 359 mln light-years away
 
WASHINGTON: Scientists have for the first time observed a rare galaxy with two outer rings surrounding a red core located about 359 million light-years away from Earth.
 
The galaxy named PGC 1000714 appears to belong to a class of rarely observed, Hoag-type galaxies.
 
It has a well-defined elliptical-like core surrounded by two circular rings.
"Less than 0.1 per cent of all observed galaxies are Hoag-type galaxies," said Burcin Mutlu-Pakdil, a graduate student at University of Minnesota in the US.
 
Hoag-type galaxies are round cores surrounded by a circular ring, with nothing visibly connecting them. The majority of observed galaxies are disc-shaped like our own Milky Way. Galaxies with unusual appearances give astronomers unique insights into how galaxies are formed and change.
 
The researchers collected multi-waveband images of the galaxy, which is only easily observable in the Southern Hemisphere, using a large diameter telescope in the Chilean mountains.
 
These images were used to determine the ages of the two main features of the galaxy, the outer ring and the central body.
 
While the researchers found a blue and young (0.13 billion years) outer ring, surrounding a red and older (5.5 billion years) central core, they were surprised to uncover evidence for second inner ring around the central body.
 
To document this second ring, researchers took their images and subtracted out a model of the core. This allowed them to observe and measure the obscured, second inner ring structure.
 
"We've observed galaxies with a blue ring around a central red body before, the most well-known of these is Hoag's object. However, the unique feature of this galaxy is what appears to be an older diffuse red inner ring," said Patrick Treuthardt, an astrophysicist at the North Carolina Museum of Natural Sciences.
 
Galaxy rings are regions where stars have formed from colliding gas.
"The different colors of the inner and outer ring suggest that this galaxy has experienced two different formation periods," Mutlu-Pakdil said.
 
"From these initial single snapshots in time, it's impossible to know how the rings of this particular galaxy were formed," she said.
 
The researchers said that by accumulating snapshot views of other galaxies like this one astronomers can begin to understand how unusual galaxies are formed and evolve.
 
While galaxy shapes can be the product of internal or external environmental interactions, researchers speculate that the outer ring may be the result of this galaxy incorporating portions of a once nearby gas-rich dwarf galaxy.
 
A A
       SCI&TECH
Next Article: Coconut sized tumor removed from Iraqi woman's head
 
 
SCI&TECH HEADLINES
Yoga helps against non-communicable diseases: WHO  
Spironolactone can help prevent acne: Study  
Older Amazonian forests help regulate global climate  
Goal conflict linked to depressive symptoms  
A new world: Top 10 new species for 2018  
Beat the risk of frailty with healthy heart  
Twitter to hide trolls that hurl abuse: Twitter CEO  
Fortnite is finally coming to Android  
This test could detect signs of pancreatic cancer  
Aliens exist but may be in parallel Universe: Study  
This is your heart on nitric oxide  
Is your kid's heart clock ticking right?  
Do at-risk adolescents show depressive symptoms on social media?  
NASA launches Insight spacecraft to Mars for deepest dig yet  
Daily intake of this drug can cause certain cancers in men  
A new weapon against epilepsy  
Hail stone weighing three kg sign of climate change: Expert  
PMSing? Could be because of alcohol!  
Social media firms given a week to better protect kids  
The stronger you are, the healthier your brain is  
NASA may soon identify 2,400 alien planets  
What triggers depression among adults?  
Turn your hobbies into part-time job opportunities with these apps  
Apple launches special RED Edition for iPhone 8, 8 Plus  
Humanity‚Äôs first flight to Sun to launch in July: NASA  
 
Do you think electric bus will be a success in Kerala?
Yes
 
No
 
No opinion
 
 
 
Home Kerala India World Business Sports Sci&Tech Education Automobile CityNews Movies Environment Letters 
© Copyright keralakaumudi Online 2011  |  Reproduction in whole or in part without written permission is prohibited.
Head Office Address: Kaumudi Buildings, Pettah P.O, Trivandrum - 695024, India.
Online queries talk to Deepu Sasidharan, + 91 98472 38959 or Email deepu[at]kaumudi.com
Customer Service -Advertisement Disclaimer Statement   |  Copyright Policy