Gemini North, one half of the
International Gemini Observatory operated by NSF’s NOIRLab, is now
peering deeper into the dusty dwellings of young stars with its new
IGRINS-2 instrument. This next-generation spectrograph is an upgraded
version of the high-demand visiting instrument IGRINS on Gemini South
that will expand our understanding of cosmic objects shrouded by dust
and gas.
IGRINS-2 (Immersion GRating INfrared Spectrograph-2) has set its ‘eyes’ on the sky for the first time. Mounted on the
Gemini North telescope, one half of the
International Gemini Observatory operated by NSF’s NOIRLab, the new instrument obtained spectra of the planetary nebula
NGC 7027, nicknamed the Jewel Bug Nebula. NGC 7027 is one of the visually
brightest planetary nebulae, and its resplendent rosette — made of
layers of gas ejected during the dying breaths of its central star —
makes for an exciting first light target.
Spectrographs are arguably the most important science instruments in
all of astronomy. Unlike high-resolution cameras that capture amazing
details of distant stars, galaxies and nebulae, spectrographs precisely
analyze the
spectrum
of light emitted by these objects, revealing detailed information about
their chemical composition. The expansion of NGC 7027’s dynamic gasses
out into the surrounding space produces a striking spectrum that
illustrates the power of the instrument.
“
With the new infrared IGRINS-2 on Gemini North complementing the
new optical GHOST on Gemini South, we now have two cutting-edge
high-resolution spectrographs,” said Jennifer Lotz, Director of Gemini Observatory. “
This expanded capability of our observatory opens up exciting windows of discovery.”
Although its first spectrum is of the death throes of a star,
IGRINS-2 is actually designed to witness the first moments of nascent
stars.
“The main science goal of IGRINS-2 is observing young stars being born inside a dusty environment,” said
IGRINS-2 Project Manager and Technical Representative Hwihyun Kim.
While these dusty birthplaces are impenetrable to visible light, a
near-infrared spectrograph like IGRINS-2 can pierce through the dust and
observe young stars in their early development.
With its ability to see through gas, dust, and other opaque
materials, IGRINS-2 is also well-suited to studying brown dwarfs,
exoplanets, the interstellar medium and the evolution of galaxies. Not
only is IGRINS-2 able to see through dust, it does so with remarkable
resolution, allowing astronomers to resolve details about stellar
atmospheres and the structures of galaxies.
IGRINS-2 was built by the Korea Astronomy and Space Science Institute (
KASI)
on behalf of the International Gemini Observatory. Initiated in March
2020, this instrument was constructed during the COVID-19 pandemic. “
It has been gratifying to see our efforts come to fruition,” said KASI Principal Investigator Chan Park. “
We delivered this instrument and its components without any delays — all
in the middle of a global pandemic — thanks to the valiant efforts of
our team and our partners at Gemini Observatory.”
During the highly-anticipated first-light event, excitement filled
the Gemini North control room as IGRINS-2 captured its first spectra. “
It’s
difficult to describe the emotion of people when they saw the first
observations; it was a mix of excitement, awe, relief, and joy,”
said Ruben Diaz, Gemini’s acting Associate Director of Development. Kim
adds that she was told by her Gemini North colleagues they had never
seen so many people in the control room at one time.
Following this significant milestone, the KASI and Gemini teams will
begin integrating IGRINS-2 with the software and subsystems at Gemini
North, a process that will take several months. Gemini staff will then
be trained in maintaining and operating the instrument. In addition,
documentation will be developed to assist the user community with the
instrument. IGRINS-2 will be available for use by the broader astronomy
community in the second half of 2024.
“The ability of IGRINS-2 to peer within otherwise opaque regions
of the Universe will allow us to better understand how stars are born
and many other astronomical phenomena hidden behind galactic dust,” said Martin Still, NSF Program Director for the International Gemini Observatory.
“NSF
congratulates our Gemini partner, KASI, and the entire telescope staff
for achieving the critical milestone of IGRINS-2 first light.”