Korean IGRINS community:Where do we want to go from here?

Jae-Joon Lee (KASI)

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.

Slit View

Developed by KASI & UT

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.

Slit View

Developed by KASI & UT

● A revolutionary increase in spectral grasp (instantaneous spectral coverage) at high resolution (R=45000) in NIR

● Best for Cool stars (e.g, M dwarfs, YSOs), and etc.

+ CO band of IRAS 03445+3242 (Class I)

4

v= 2-0 v= 3-1 v= 4-2 v= 5-3

Broad bandhead

Double peaks in isolated lines

Narrow absorption lines

Courtesy of Seokho Lee (KHU) - Lee et al, ApJ 826 2

Scale is not linear!!

Vrot ~100 km s-1Vwind/outfow ~5 km s-1

≤ ~ 0.15 AU

Scale is not linear!!

Vrot ~100 km s-1Vwind/outfow ~5 km s-1

≤ ~ 0.15 AU

NGC 7027 (Planetary Neb.) Rectified 2D Spec.

H band K band

NGC 7027 (PN)Yu et al. (in prep.)

❖ Hydrogen❖ H2❖ Iron (Fe)❖ Krypton (Kr)❖ Selenium (Se)❖ etc.

❖ Dust(?)

Position-Velocity diagram

H2 Excitation in the Orion BarCourtesy of Kyle Kaplan (UT)

� ~100 H2 ro-vibrational lines� vibration levels up to 10

� Collision vs. UV pumping

SS433 (Microquasar)● An eclipsing X-ray binary system, with the primary most

likely a black hole (?)● Robinson et al. (2017)

Korean contribution to IGRINS Team Papers

❖ 9 Team Papers (6 published)❖ 6 of them have Korean 1st author

➢ Published : 4

Title Lead Author

High velocity jet in LkHalpha 234 Heeyoung Oh

Low Density PDR in NGC 7023 Huynh Anh Le

Serpens 2 Class I source Aran Lyo

Orion Bar Heeyoung Oh

OH Night Sky Spectrum and Variations Chan Park

NGC 7027 Planetary Nebula Young Sam Yu

Korean guaranteed time

❖ Korean Legacy Programs for McDonald❖ Strategic Program for DCT

=> Korean participation to Gemini LLP

=> Competitive Gemin open programs

IGRINS Legacy Programs@McDonald

❖ Standard Library➢ Spectral Library : J.-E. Lee (이정은)➢ Telluric Standards : J.-J. Lee (이재준)

❖ YSO programs➢ Class I YSOs : A. Lyo (여아란)➢ T Tauri Stars in Tau-Aur : K.-H. Kim (김경희)➢ Protoplanetary Disks : J.-E. Lee (이정은)➢ Accretion to Outflows : T.-S. Pyo (표태수)

Korean Strategic program@DCT❖ IGRINS Survey of Young Stellar Objects

❖ Systematic survey of low mass members of young, nearby moving groups down to the brown dwarf range

Modeling and analysis of disk emission

Modeling and analysis of disk emission

CO Bandhead: YSOs

CO Bandhead: Evolved Stars

Evolved stars

❖ Cirmcumstellar features around evolved stars

❖ Massive evolved stars❖ Symbiotic stars❖ KVN follow-ups

IGRINS spectra of V1016 Cyg

● CO bandhead absorption● H Brackett series emission lines● He II, [Fe II] emission lines● Coronal lines

V1016 Cyg

M5 star

● CO bandhead absorption● H Brackett series emission lines● He II, [Fe II] emission lines● Coronal lines

● CO bandhead absorption● H Brackett series emission lines● He II, [Fe II] emission lines● Coronal lines

Extended source

❖ Jets/Outflows from YSO➢ Heeyoung and Tae-Soo

❖ Supernova Remnants➢ Jae-Joon, Bon-Chul and his team

❖ While extended source may not be very relevant for our Gemini opportunity, it may be worthwhile to focus on these given there is good Korean community behind it.

IGRINS Pipeline

❖ Most of the IGRINS publications use the output of the pipeline we developed.➢ Primarily due to the simple instrument design.

❖ There are things missing➢ Telluric modelling

➢ OH emission modelling

➢ better support for extended source

Make your code Publicly Available!❖ Kyle’s extended emission analysis code

➢ Can Korean community pick-up and continue the development of his code?

❖ TelFit by Kevin

Modeling Telluric features

❖ Especially with Gemini, we need to think about how we can make observations more efficient and how to optimize A0V observations

❖ There already exist telluric modelling tools.➢ TelFit by Kevin Gullikson (former UT grad.)➢ Molecfit by Alain Smette (ESO)➢ Both are based on LBLRTM code.

Modeling of OH line

❖ On-going project by Chan to analyze OH sky lines

❖ It would be good if we can contribute in modelling of OH sky lines➢ Better understanding of earth's atmosphere➢ Better sky subtraction

❖ There are lots of things you can contribute!➢ Some of the topics could be done by

undergrads.

❖ Even though you have not observed with IGRINS yet, maybe we already observed your targets!

❖ With DCT, we will run mini-Queue programs!➢ No need to write a full proposal.

Thank You!