korean igrins community: where do we want to go from...
TRANSCRIPT
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Korean IGRINS community:Where do we want to go from here?
Jae-Joon Lee (KASI)
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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
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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.
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+ 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
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Scale is not linear!!
Vrot ~100 km s-1Vwind/outfow ~5 km s-1
≤ ~ 0.15 AU
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Scale is not linear!!
Vrot ~100 km s-1Vwind/outfow ~5 km s-1
≤ ~ 0.15 AU
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NGC 7027 (Planetary Neb.) Rectified 2D Spec.
H band K band
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NGC 7027 (PN)Yu et al. (in prep.)
❖ Hydrogen❖ H2❖ Iron (Fe)❖ Krypton (Kr)❖ Selenium (Se)❖ etc.
❖ Dust(?)
Position-Velocity diagram
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H2 Excitation in the Orion BarCourtesy of Kyle Kaplan (UT)
� ~100 H2 ro-vibrational lines� vibration levels up to 10
� Collision vs. UV pumping
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SS433 (Microquasar)● An eclipsing X-ray binary system, with the primary most
likely a black hole (?)● Robinson et al. (2017)
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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
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Korean guaranteed time
❖ Korean Legacy Programs for McDonald❖ Strategic Program for DCT
=> Korean participation to Gemini LLP
=> Competitive Gemin open programs
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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)
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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
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Modeling and analysis of disk emission
Modeling and analysis of disk emission
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CO Bandhead: YSOs
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CO Bandhead: Evolved Stars
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Evolved stars
❖ Cirmcumstellar features around evolved stars
❖ Massive evolved stars❖ Symbiotic stars❖ KVN follow-ups
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IGRINS spectra of V1016 Cyg
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● CO bandhead absorption● H Brackett series emission lines● He II, [Fe II] emission lines● Coronal lines
V1016 Cyg
M5 star
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● CO bandhead absorption● H Brackett series emission lines● He II, [Fe II] emission lines● Coronal lines
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● CO bandhead absorption● H Brackett series emission lines● He II, [Fe II] emission lines● Coronal lines
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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.
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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
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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
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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.
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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
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❖ 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.
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Thank You!