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M Giants with IGRINS II. Chemical Evolution of Fluorine at High Metallicities
G. Nandakumar, N. Ryde, G. Mace
The origin and evolution of fluorine in the Milky Way galaxy is still in debate. In particular, the increase of the [F/Fe] in metal-rich stars found from near-IR HF-lines is challe…
Chemical Evolution of Ytterbium in the Galactic Disk
M. Montelius, R. Forsberg, N. Ryde +8
Measuring the abundances of neutron-capture elements in Galactic disk stars is an important part of understanding key stellar and galactic processes. In the optical wavelength regi…
The Transition from Diffuse Molecular Gas to Molecular Cloud Material in Taurus
S. R. Federman, Johnathan S. Rice, A. M. Ritchey +6
We study four lines of sight that probe the transition from diffuse molecular gas to molecular cloud material in Taurus. Measurements of atomic and molecular absorption are used to…
Fluorine in the solar neighbourhood: the need for several cosmic sources
Nils Ryde, Henrik Jönsson, Gregory Mace +14
The cosmic origin of fluorine is still not well constrained. Several nucleosynthetic channels at different phases of stellar evolution have been suggested, but these must be constr…
High-resolution near-IR Spectral mapping with H and [Fe II] lines of Multiple Outflows around LkH 234
Heeyoung Oh, Tae-Soo Pyo, Bon-Chul Koo +11
We present a high-resolution, near-IR spectroscopic study of multiple outflows in the LkH 234 star formation region using the Immersion GRating INfrared Spectrometer (IGRINS). S…
Excitation of Molecular Hydrogen in the Orion Bar Photodissociation Region From a Deep Near-Infrared IGRINS Spectrum
Kyle F. Kaplan, Harriet L. Dinerstein, Heeyoung Oh +9
We present a deep near-infrared spectrum of the Orion Bar Photodissociation Region (PDR) taken with the Immersion Grating INfrared Spectrometer (IGRINS) on the 2.7 m telescope at t…
Three-dimensional Shock Structure of Orion KL Outflow with IGRINS
Heeyoung Oh, Tae-Soo Pyo, Kyle F. Kaplan +17
We report a study of the three-dimensional (3D) outflow structure of a 15$\arcsec$ 13$\arcsec$ area around H peak 1 in Orion KL with slit-scan observations (13 slits…
Fluorescent H_2 Emission Lines from the Reflection Nebula NGC 7023 Observed with IGRINS
Huynh Anh N. Le, Soojong Pak, Kyle F. Kaplan +17
We have analyzed the temperature, velocity and density of H2 gas in NGC 7023 with a high-resolution near-infrared spectrum of the northwestern filament of the reflection nebula. By…
IGRINS spectroscopy of Class I sources: IRAS 03445+3242 and IRAS 04239+2436
Seokho Lee, Jeong-Eun Lee, Sunkyung Park +4
We have detected molecular and atomic line emission from the hot and warm disks of two Class I sources, IRAS 03445+3242 and IRAS 04239+2436 using the high resolution Immersion GRat…
The Ly-alpha Properties of Faint Galaxies at z2-3 with Systemic Redshifts and Velocity Dispersions from Keck-MOSFIRE
Dawn K. Erb, Charles C. Steidel, Ryan F. Trainor +13
We study the Lya profiles of 36 spectroscopically-detected Lya-emitters (LAEs) at z2-3, using Keck MOSFIRE to measure systemic redshifts and velocity dispersions from rest-frame op…
Strong Nebular Line Ratios in the Spectra of z~2-3 Star-forming Galaxies: First Results from KBSS-MOSFIRE
C. C. Steidel, G. C. Rudie, A. L. Strom +11
We present initial results of a deep near-IR spectroscopic survey covering the 15 fields of the Keck Baryonic Structure Survey (KBSS) using MOSFIRE on the Keck 1 telescope, focusin…
New M, L, and T Dwarf Companions to Nearby Stars from the Wide-field Infrared Survey Explorer
Kevin L. Luhman, Nicholas P. Loutrel, Nicholas S. McCurdy +8
We present 11 candidate late-type companions to nearby stars identified with data from the Wide-field Infrared Survey Explorer (WISE) and the Two Micron All-Sky Survey (2MASS). Eig…