A star system where gas and dust have formed into a disk around a newly formed star. The leftover disk will most likely form planets, comets and asteroids. Credit: NASA
No one is ever excited when the topic of “dust” is brought up. Usually dust is a hindrance – something you sweep away during spring-cleaning, or an annoyance because your allergies can’t handle it. But for astronomers, finding dust around another star – i.e., circumstellar dust – is like finding the next piece of an interstellar puzzle. That’s because circumstellar dust holds clues to understanding not only the origins of planets outside of our solar system, but also gives us a leg up in figuring out our place in the Universe.Read the rest of this entry »
Happy new year, Internet! I’m starting off the year at the 225th meeting of the American Astronomical Society. It’s an annual conference where all the professional astronomers in the United States get together and talk about space! There’s been some really cool presentations, including the discovery of Earth-sized planets in possibly habitable orbits around other stars by Kepler. Sounds pretty cool right?
A subset of the GPI team was here for the AAS. We gave an update on the GPI Exoplanet Survey, presented posters on debris disks and exoplanets imaged by GPI, and even had a press conference on recent GPI results!
In addition to all the GPI results, the GPI team also had a team lunch to talk about starlight subtraction. Even with the star masked out, starlight still diffracts around the coronagraph and hides the faint exoplanets and debris disks that we are trying to see. As you might guess, starlight subtraction is a really important for GPI, especially with the kickoff of the GPI Exoplanet Survey just a couple of months ago. The content of meeting was a bit technical so I’ll spare you the summary here. It was a productive lunch though, and overall it’s been a great conference!
The GPI Team in Seattle. Photo credit: Marshall Perrin
GPI imaging of the planetary system HR 8799 in K band, showing 3 of the 4 planets. (Planet b is outside the field of view shown here, off to the left.) These data were obtained on November 17, 2013 during the first week of operation of GPI and in relatively challenging weather conditions, but with GPI’s advanced adaptive optics system and coronagraph the planets can still be clearly seen and their spectra measured (see Figure 2). Image Credit: Christian Marois (NRC Canada), Patrick Ingraham (Stanford University) and the GPI Team.
For release at the American Astronomical Society meeting press confer-ence January 6, 2015, 10:15am (PST)
Publication-quality images available at:
THE GEMINI PLANET IMAGER PRODUCES STUNNING OBSERVATIONS IN ITS FIRST YEAR
Stunning exoplanet images and spectra from the first year of science operations with the Gemini Planet Imager (GPI) were featured today in a press conference at the 225th meeting of the American Astronomical Society (AAS) in Seattle, Washington. The Gemini Planet Imager GPI is an advanced instrument designed to observe the environments close to bright stars to detect and study Jupiter-like exoplanets (planets around other stars) and see proto-stellar material (disk, rings) that might be lurking next to the star.
Read the rest of this entry »
To follow up to Jason’s post, here’s a photo of our summit team today – much reduced in numbers here in person from a year ago, but this is just the tip of the GPI team iceberg, and we were joined online and via teleconference by at least a dozen other members of the team from California to Canada to Maryland to Australia. Not to mention all the tremendous contributions from so many team members to the hardware, software, target selection, and data analysis needed to bring this complex creature into reality.
And, without further ado, now that GPI is built, delivered, and commissioned… it’s time to let those mirrors dance!
One year ago, GPI saw its first starlight on the night of November 11-12, 2013. In the year since that, the GPI team has been very busy. We’ve detected our first exoplanet, had a series of commissioning runs, took the SPIE conference at Montreal by storm, and found a new friend. Tonight, the night of November 11-12, 2014, we are in the midst of starting what GPI was designed to do: discovering new exoplanets! To celebrate this exciting year for GPI, we tried to recreate this moment from first starlight:
Figure 1. The GPI commissioning team at the Gemini South control room assembles for the first night of commissioning on November 11, 2013. From left to right: Naru Sadakuni, Andrew Cardwell, Marshall Perrin, Stephen Goodsell, Fredrik Rantakyro, Bruce Macintosh, Jeff Chilcote, Dave Palmer, Dmitry Savransky, Sandrine Thomas, Les Saddlemyer, Jennifer Dunn, Ramon Galvez, Carlos Quiroz, Markus Hartung. Not shown, working from the La Serena Base Facility: Kayla Hardie, Pascale Hibon, Andrew Serio, and Cristian Urrutia.
Here’s our attempt:
Pascale, Eric, Dmitry, Bruce, and Andrew celebrating.
Marshall, Ariel, and TV-Jeff enjoying the moment.
The party this time around isn’t quite as packed. The observing crew is only half the size of our first light run. I think this shows we’ve made some significant strides in this last year. We’ve fixed a lot of problems and streamlined a lot of tasks so it doesn’t take as many people to observe with such a complicated instrument. However, arguably we have much more to be excited about. With GPI fully operational, we can now start discovering new worlds! Here’s to many more great years of GPI science!
The GPIES Exoplanet Survey has begun! But that’s a different post. For now, here are some photos of these great beautiful machines.
As we came up to the domes after dinner tonight, we had a visitor overhead, circling around and, well, soaring over the SOAR telescope right next door. Our local expert in Andean wildlife, Gemini instrument scientist Pascale Hibon, says this is a juvenile female condor, younger than three years because she’s not yet displaying any white adult feathers. We have decided she is named Henrietta.
The sun has just set, and we’re slewing towards the first target of the night… ¡Adelante!
I don’t normally post about food, but this was too good to pass up.
The food they serve at the cafeteria on the summit can sometimes be very interesting. For my breakfast (dinner for people that are awake during the day) today, I had rice with the little alphabet letters you find in alphabet soup commonly.
Even on a summit in Chile, you can’t escape alphabet pasta!
Naturally, the thing to do when served this is to spell GPI. The ‘P’ was particularily hard to find in my dinner.
GPI spelled with alphabet soup letters
Time for my second GPI observing run! And this one is especially exciting as this run will officially start the GPI Exoplanet Survey. Flying down to observe on GPI can be its own adventure though. The closest city to the Gemini South Telescope is La Serena. Coming from the Bay Area, it takes about a full day to get to La Serena, involving at least two layovers (e.g. Dallas and Santiago), and often it doesn’t go exactly at planned.
Flight path from San Francisco to La Serena. Over 10,000 km!
This time, our flight from Dallas to Santiago encountered a mechanical error and was delayed. Unfortunately, since this happened around midnight, this meant we would not fly out until the next morning. The airline had to book everyone in hotels for the night, and I’m not sure if it is because they were running low on hotel rooms, but we were booked into an extremely interesting hotel. It was a Andy Warhol themed hotel, filled with Warhol artwork and Warhol-esque furniture. The toiletries even had Warhol inspired designs (I kept one as a souvenir). Here’s a picture of the lobby, although this picture doesn’t quite do it justice.
Bruce capturing the experience of the Andy Warhol themed hotel in Dallas, Texas
Here’s another shot of the lobby with some of our fellow stranded passengers waiting to check in.
Lobby of the hotel with other stranded airline passengers looking for some rest.
This certainly was a memorable forced layover in Dallas. But now I’ve made it to the summit, it’s time to focus on finding some exoplanets!
This week was the fourth commissioning run for GPI and I was happy to be back at Gemini to help. When we arrived it was a little cloudy, but just as beautiful as I remembered.
This week predicted an unfavorable forecast; the first several nights battled cloud cover and high winds, which meant a lot of engineering tests and fewer opportunities to actually look at the sky. Clouds make for some really fantastic sunsets, though.
With a the storm rolling in last night with high winds we were unable to open the dome. We stayed over night with the hope of bright eyed astronomers that it would not snow and we would have clear skies for Saturday. In the morning we woke up to a winter wonderland.
Every so often our own planet reminds us to take a break from work and build a snow..thing.
During the snow storm on the 4th GPI commissioning the team builds a snow sculpture!
One of the walls of GPI-focused papers at #SPIEastro in Montreal on Monday June 23 (credit: M. Perrin)
It was an important week for the Gemini Planet Imager Consortium. Several of us met at SPIE Astro in Montreal, Quebec, Canada to present our work on GPI. Katie Morzinski wrote a blog post describing the GPI -focused events at the conference, so I will briefly give my perspective.
Arriving at Montreal by train. (credit: F. Marchis)
GPI: A scientific partnership between institutions from the U.S.A., Canada, Australia, Argentina, Brazil and Chile.