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Jeffrey Linsky

Content About: Jeffrey Linsky

Published: 12/13/2016 - 10:13am Type of Content: Article-Research Highlight

Astrophysicist Jeff Linsky and his colleagues recently created a sophisticated mathematical model of the outer atmosphere of the small M-dwarf star called GJ832. The new model fits well with spectral observations of the star made with the Hubble Space Telescope (HST). This accomplishment bodes well for two reasons: First, it provides a tool for better understanding M-dwarf stars––the most...

Published: 12/08/2015 - 12:11pm Type of Content: Article-Research Highlight

In 2008, Fellow Jeff Linsky and his colleague Seth Redfield of Wesleyan University used spectral information gathered by the Hubble Space Telescope to figure out that the solar system is surrounded by 15 nearby clouds of warm gas, all within 50 light years of the Sun. In 2014, Cécile Gry of Aix-Marseille Université (France) and Edward Jenkins of Princeton University Observatory analyzed the...

Published: 07/16/2015 - 3:43pm Type of Content: Article-Research Highlight

For astrophysicists like Fellow Jeff Linsky, the Lyman-α spectral line of atomic hydrogen is a powerful tool for investigating the stellar winds emitted by stars, the deuterium/hydrogen (D/H) ratio in the Galaxy, the excited states of hydrogen molecules and carbon monoxide in the environments around young stars, and photochemical processes that create oxygen in the atmospheres of planets...

Published: 03/13/2013 - 1:57pm Type of Content: Article-Research Highlight

Astrophysicist Fellow Jeff Linsky and his colleagues from CU’s Center for Astrophysics and Space Astronomy have come up with a neat strategy for helping to determine whether an exoplanet’s atmosphere contains evidence of Earth-like life. The first step is to see whether an exoplanet’s atmosphere contains oxygen (O2), ozone (O3), or other molecules that could have been...

Published: 04/19/2011 - 6:00pm Type of Content: Article-Research Highlight

The Cosmic Origins Spectrograph, or COS, is a powerful new instrument scanning the Universe. COS was installed on the Hubble Space Telescope in 2009. Since then, it has been searching for clues about the composition of the Universe, including how galaxies like our own Milky Way formed and evolved over time. It is seeing beautiful things never before detected in the Universe because it is the...

Published: 08/17/2010 - 6:00pm Type of Content: Article-Research Highlight

A faint star that can easily be seen from Earth with binoculars has a Jupiter-like gas planet orbiting it once in just three days. That means the planet is close enough to its Sun-like star to get scorching hot, which affects both the planet and its atmosphere. The star is called HD209458, and its planet’s moniker is HD209458b.

Recently Fellow Jeff Linsky, research...

Published: 07/08/2009 - 6:00pm Type of Content: Article-Research Highlight

Our solar system is currently sprinting around the center of the Milky Way at a speed of 26 km/sec. But, we’re not just hurtling through empty space, according to Fellow Jeff Linsky and former graduate student Seth Redfield (now assistant professor of astronomy at Wesleyan University). We’re surrounded by 15 "nearby" clouds of warm gas, all within 50 light years of the...

Published: 02/09/2008 - 5:00pm Type of Content: Article-Research Highlight

What did Fellow Jeff Linsky come home with from a 2006 SINS conference?

He arrived at JILA with the realization that quasars twinkle for much the same reason stars twinkle: Light from both quasars and stars pass through turbulence that mixes up the light rays, causing the light to vary in intensity, or twinkle. However, the stars we see every night twinkle because of turbulence in...

Published: 02/09/2007 - 5:00pm Type of Content: Article-Research Highlight

Our Sun and its eight planets were born in a rough neighborhood nearly 5 billion years ago. Since then our star has traveled countless light years through the Milky Way, and our planet Earth has evolved the only intelligent life we know of in the Universe. Now, Earth's progeny are seeking to understand not only their own origins, but those of the Sun and its planets. They've...

Published: 02/09/2006 - 5:00pm Type of Content: Article-Research Highlight

We know a lot about cool stars because our Sun is one of them. However, we can't know for sure if cool stars produce winds (like the Sun does) without looking for evidence of such winds. Where stellar winds exist, they interact with hydrogen in the interstellar medium far from the star to produce tell-tale absorption in stellar ultraviolet spectral lines. The solar wind produces a...

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