IGRINS: Immersion GRating INfrared Spectrograph. Jae-Joon Lee (KASI) on behalf of IGRINS Team
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1 IGRINS: Immersion GRating INfrared Spectrograph Jae-Joon Lee (KASI) on behalf of IGRINS Team
2 Efficient & Compact NIR Spectrograph, simultaneously covering H & K band with R~45,000.
3 Given the FINITE detector area FOV They are incompatible and competing! Spectral Resolution Spectral Coverage
4 Uniqueness of IGRINS Silicon Immersion Echelle Grating silicon : n ~ 3.44 at 2.5 um compact instrument! Big advantage for IR instrument which need to be cooled. Typical Grating Immersion Grating
5
6 Compact attached at Cassegrain Focus of 2.7m telescope VLT IGRINS
7 IGRINS Summary Simultaneous H & K w/ R ~ 45,000. Two detector: H & K ~25 orders per each detector Slit characteristics w/ 2.7m telescope Slit length = 15 Slit width = 1 Optimized for stellar sources. Works reasonably well for compact extended sources. Developed by KASI & UT PI : Dan Jaffe Korean PI : Insu Yuk, Chan Park Slit View
8 Example Spectra : TW Hydra (T-Tauri star) Image credit: S. Andrews (Harvard-Smithsonian CfA); B. Saxton (NRAO/AUI/NSF); ALMA (ESO/NAOJ/NRAO) Brackett 11-4 CO bandhead
9 Example Spectra : TW Hydra (T-Tauri star) A revolutionary increase in spectral grasp (instantaneous spectral coverage) at high resolution (R=45000) in NIR Best for M dwarfs, YSOs, and etc. Image credit: S. Andrews (Harvard-Smithsonian CfA); B. Saxton (NRAO/AUI/NSF); ALMA (ESO/NAOJ/NRAO) Brackett 11-4 CO bandhead
10 + Courtesy of Seokho Lee (KHU) - Lee et al, ApJ CO band of IRAS (Class I) Broad bandhead v= 2-0 Narrow absorption lines Double peaks in isolated lines v= 3-1 v= 4-2 v= 5-3
11 Vrot ~100 km s-1 Vwind/outfow ~5 km s-1 ~ 0.15 AU Scale is not linear!!
12 NGC 7027 (Planetary Neb.) Rectified 2D Spec. H band K band
13 NGC 7027 (PN) Yu et al. (in prep.) Hydrogen H2 Iron (Fe) Krypton (Kr) Selenium (Se) etc. Dust(?) Position-Velocity diagram
14 H2 Excitation in the Orion Bar Coutesy of Kyle Kaplan (UT) ~100 H2 ro-vibrational lines vibration levels up to 10 Collision vs. UV pumping
15 SS433 (Microquasar) An eclipsing X-ray binary system, with the primary most likely a black hole (?) Robinson et al. (submitted to ApJ)
16 Two IGRINS talks in this meeting A-Ran Lyo : Inner warm disk of Class I ESO Hα279a revealed by NaI and CO overtone emission lines Heeyoung Oh : Three-dimensional Shock Structure of Orion KL Outflow with IGRINS
17 Current Status & Future After successful commissioning in early 2014, IGRINS has started regular observations from Sep at HJST 2.7m telescope in McDonald observatory, Texas. Virtually all the bright nights at HJST have been used by IGRINS. ~10 Sci. papers published so far. A lot more coming! IGRINS is now visiting DCT 4.3m telescope in Lowell observatory, Arizona. IGRINS is expected to visit Gemini South in early 2018 IGRINS will serve as a pathfinder of GMTNIRS on GMT.
18 July 28: Removed from 2.7m telescope on to the truck, heading to Austin 18
19 August 30 Tracking is working. IGRINS is on 290, headed your way! G. Mace, referring to stowaway cell phone on Fedex truck 19
20 20
21 DCT : Modern 4.3m telescope, but.. problem solving electronics rack Lowell, UT, KASI personnel
22 Small but Powerful instrument will outperform NIRSPEC on Keck and CRIRES on VLT
23 September 8 First Light (K-band) Wolf 1130, H=8.3 mag, K=8.1 mag
24 We welcome collaboration from EA community. IGRINS is a PI instrument DCT 4.3m is private telescope HJST 2.7m has some open time. Big thanks to IGRINS instrument team for their hard work to make it happen!
25 Thank You!
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