Dr. Sean Raymond

• 
  www.space.com/common/forums/viewtopic.php?t=16646 - [Cached Version]
  Published on: 6/5/2009    Last Visited: 6/5/2009  

  University of Colorado, Sean Raymond
  ...
  Before booking your next interstellar flight, come check out how Sean Raymond's stellar simulations are being used in the search for habitable planets. Many of the 240 extra-solar planets that have been discovered so far are "hot Jupiters" -- gas giants orbiting very close to their host stars. Sean's work has shown that when these hot Jupiters form far from their host stars and migrate inward, they leave conditions in their wake favorable for the formation of a wide diversity of habitable planets, from small dry worlds to massive ocean-covered planets. In this talk, Sean will present an overview of his search to understand how and when habitable planets form, complete with movies of evolving solar systems. And even though you can't book a flight to Proxima Centauri yet, come see how current research is helping to narrow the search for places you might actually want to visit. Sean Raymond is a NASA Postdoctoral Fellow at the University of Colorado's Center for Astrobiology.

• 
  www.scottrichardslive.com/SRLBlogArchive_200609.htm - [Cached Version]
  Published on: 9/1/2006    Last Visited: 1/14/2008  

  These solar systems feature gas giants known as "Hot Jupiters," which orbit extremely close to their parent stars - even closer than Mercury to our sun, University of Colorado researcher Sean Raymond said.
  
  The close-orbiting gassy planets may help encourage the formations of smaller, rocky, Earthlike planets, they reported in the journal Science.
  
  We now think there is a new class of ocean-covered, and possibly habitable, planets in solar systems unlike our own," Raymond said in a statement.
  
  The team from Colorado, Penn State University and NASA's Goddard Space Flight Center Maryland ran computer simulations of various types of solar systems forming.
  
  The gas giants may help rocky planets form close to the suns, and may help pull in icy bodies that deliver water to the young planets, they found.
  
  "These gas giants cause quite a ruckus," Raymond said.
  
  Water is key to life as humans define it.
  
  "I think there are definitely habitable planets out there," Raymond said.
  ...
  These solar systems feature gas giants known as "Hot Jupiters," which orbit extremely close to their parent stars - even closer than Mercury to our sun, University of Colorado researcher Sean Raymond said.
  
  The close-orbiting gassy planets may help encourage the formations of smaller, rocky, Earthlike planets, they reported in the journal Science.
  
  We now think there is a new class of ocean-covered, and possibly habitable, planets in solar systems unlike our own," Raymond said in a statement.
  
  The team from Colorado, Penn State University and NASA's Goddard Space Flight Center Maryland ran computer simulations of various types of solar systems forming.
  
  The gas giants may help rocky planets form close to the suns, and may help pull in icy bodies that deliver water to the young planets, they found.
  
  "These gas giants cause quite a ruckus," Raymond said.
  
  Water is key to life as humans define it.
  
  "I think there are definitely habitable planets out there," Raymond said.

• 
  www.astrobiology.com/news/viewpr.html?pid=20419 - [Cached Version]
  Published on: 7/24/2006    Last Visited: 7/4/2007  

  Each simulation assumed the same conditions in the planetary system except that the position and mass of each protoplanet was altered slightly, said Sean Raymond, a postdoctoral researcher at the University of Colorado, who took part in the work while he was an astronomy doctoral student at the University of Washington.
  
  Raymond is lead author of a paper describing the research published in June in the Astrophysical Journal.
  ...
  "What surprised me the most was to see the system that only formed planets the size of Mars or smaller," Raymond said.
  ...
  If the migration occurs late in the system's development, the giant planets might destroy most of the materials needed to build Earth-like planets, Raymond said.He noted that while the presence of giant planets is fairly well established, it will be some time before it is possible to detect much smaller Earth-sized planets around other stars.
  
  For another recent paper, Raymond ran more than 450 computer simulations to map giant planet orbits that allow Earth-like planets to form.If a giant planet is too close it will prevent rocky material from amassing into an Earth-sized planet.That study showed that only about 5 percent of the known giant-planet systems are likely to have Earth-like planets.But because of long observation times and sensitive equipment needed to detect planets the size of Saturn and Jupiter, it is possible there could be many planetary systems such as ours in this galaxy, he said.
  
  For more information, contact Raymond at (303) 735-3729 or raymond@lasp.colorado.edu, or Barnes at (520) 626-3154 or rory@lpl.arizona.edu; or Kaib at (206) 616-4549 or nak2@u.washington.edu.

• 
  www.biology-online.org/articles/earth-like_planets_may_ - [Cached Version]
  Published on: 4/23/2007    Last Visited: 4/23/2007  

  The study focuses on a type of planetary system unlike our solar system that contains gas giants known as "Hot Jupiters" orbiting extremely close to their parent stars -- even closer than Mercury to our sun, said CU-Boulder researcher Sean Raymond.Such gas giants are believed to have migrated inward toward their parent stars as the planetary systems were forming, disrupting the space environment and triggering the formation of ocean-covered, Earth-like planets in a "habitable zone" conducive to the evolution of life, according to the new study.
  
  "Exotic Earths: Forming Habitable Worlds with Giant Planet Migration" was published in the Sept. 8 issue of Science and authored by Raymond, Avi Mandell of both Penn State and Goddard Space Flight Center in Greenbelt, Md., and Steinn Sigurdsonn of NASA's Goddard Center.
  ...
  The study indicates Hot Jupiters push and pull proto-planetary disk material during their journeys, flinging rocky debris outward where it is likely to coalesce into Earth-like planets, said Raymond.At the same time, turbulent forces from the dense surrounding gas slow down the orbits of small, icy bodies in the outer reaches of the disk, causing them to spiral inward and deliver water to the fledgling planets.Such planets may eventually host oceans several miles deep, according to the study.
  
  "These gas giants cause quite a ruckus," said Raymond of CU-Boulder's Laboratory for Atmospheric and Space Physics."We now think there is a new class of ocean-covered, and possibly habitable, planets in solar systems unlike our own."
  
  Scientists had previously assumed that as Hot Jupiters plowed through proto-planetary material on their inward migrations toward parent stars, all the surrounding material would be "vacuumed up" or ejected from the system, he said."The new models indicate these early ideas were probably wrong," said Raymond.
  
  The research team ran exhaustive simulations lasting more than eight months each on more than a dozen desktop computers, starting with proto-planetary disks containing more than 1,000 moon-sized, rocky and icy bodies.The initial conditions for each computer model were based on current theories of how planets form in our own solar system and simulated about 200 million years of planetary evolution.
  
  The team concluded that about one of every three known planetary systems could have evolved as-yet-undetected Earth-like planets in so-called habitable zones like the one Earth is in, he said.A whopping 40 percent of the 200 or so known planets around other stars are Hot Jupiters, although the percentage probably will decrease as more distant planets are discovered, said Raymond.
  
  In addition to Earth-like planets that form in habitable zones outside Hot Jupiters, the simulations showed some rocky planets known as "Hot Earths" often form inside the orbits of Hot Jupiters, said Raymond.
  ...
  Earth-like planets in habitable zones form much more slowly, taking up to 200 million years, said Raymond.Geologists believe Earth took about 30 million years to 50 million years to fully form.
  
  "I think there are definitely habitable planets out there," said Raymond.

• 
  www.creaso.com/english/15_succ/idl_phys_planets/idl_phy - [Cached Version]
  Last Visited: 9/14/2009  

  As part of the research team, Sean Raymond of CU used IDL as his primary research tool. Raymond learned to use IDL during graduate work at the University of Washington because instructors and students considered it the best tool for performing complex computational analyses and creating visualizations – such as plots - for large datasets. And, because IDL was easy to learn, students could spend more time on their research and less time learning to program to see their results. “The biggest thing was that it was easy and quick to learn, so there wasn’t this big learning curve to begin doing our work,” said Raymond.
  ...
  In the case of the Hot Jupiter project, Raymond and researchers from universities around the country conducted the simulations with existing data to determine how these enormous planets’ migration patterns affected the formation of planets around them. The process involved running simulations with a Fortran code, and then analyzing the output with IDL, where they could validate results and create plots.
  
  Using IDL, they could easily create new code to quickly analyze huge arrays and datasets. “I write a lot of my functions on the fly,” said Raymond. “But I also keep a lot of recursive functions in my own library that I’ve written over the years. I used a lot of those in the analyses.” IDL’s array-based architecture allowed Raymond to use his recursive functions – on many arrays and eliminated the need for repetitive, time-consuming programming.

• 
  www.visual--media.com/blog/?p=267#respond - [Cached Version]
  Last Visited: 6/30/2007  

  Eridani is a triple star system and the 3 suns are far enough apart so that there is the possibility that planets might have formed, according to Dr. Sean Raymond of the University of Colorado.
  
  No Comments Leave a comment

• 
  www.frimlin.com/links/2003/12/simulation-indicates-eart - [Cached Version]
  Published on: 1/1/2003    Last Visited: 9/1/2008  

  You can have planets that are half the size of Earth and are very dry, like Mars, or you can have planets like Earth, or you can have planets three times bigger than Earth, with perhaps 10 times more water," said Sean Raymond, a University of Washington doctoral student in astronomy.
  
  Read more @ SpaceFlight Now.

• 
  www.astrobiology.net/archives/extrasolar_planets/ - [Cached Version]
  Published on: 11/2/2007    Last Visited: 11/9/2007  

  NAI Postdoctoral Fellow Sean Raymond leads a team of authors from NAI's University of Colorado, Boulder, and University of Arizona Teams, and Virtual Planetary Laboratory and University of Washington Alumni Teams in a new publication in Astrobiology.
  ...
  Speakers: Sean Raymond (University of Colorado) and Avi Mandell (Goddard Space Flight Center) Date/Time: Monday, November 27, 2006 11AM PST

• 
  www.astrobiology.net/index.xml - [Cached Version]
  Published on: 4/22/2007    Last Visited: 5/2/2007  

  NAI Postdoctoral Fellow Sean Raymond leads a team of authors from NAI's University of Colorado, Boulder, and University of Arizona Teams, and Virtual Planetary Laboratory and University of Washington Alumni Teams in a new publication in Astrobiology.

• 
  www.universetoday.com/2008/04/21/how-big-do-planets-get - [Cached Version]
  Published on: 1/1/2008    Last Visited: 10/10/2008  

  For this I put in an email to Dr. Sean Raymond, a post doctoral researcher at the Center for Astrophysics and Space Astronomy (CASA) at the University of Colorado.Here's what he had to say:
  ...
  Again, here's Dr. Raymond:

Page:  1 2 3 4 5