150 citations · 843 across the 28 of their papers we have counts for
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High-Resolution Infrared Spectroscopy of the Dust-Obscured Metal-Poor Open Cluster Trumpler 5
S. Özdemir, M. Afşar, C. Sneden +8
Trumpler 5 is a moderately old, dust-obscured metal-poor open cluster. In this study, high-resolution near-infrared spectroscopic data of seven giant stars from the Trumpler 5 clus…
The IGRINS YSO Survey I. Stellar parameters of pre-main sequence stars in Taurus-Auriga
Ricardo López-Valdivia, Kimberly R. Sokal, Gregory N. Mace +19
We present fundamental parameters for 110 canonical K- & M-type (1.30.13) Taurus-Auriga young stellar objects (YSOs). The analysis produces a simultaneous determination…
Projected Rotational Velocities and Fundamental Properties of Low-Mass Pre-Main Sequence Stars in the Taurus-Auriga Star Forming Region
Larissa A. Nofi, Christopher M. Johns-Krull, Ricardo López-Valdivia +11
The projected stellar rotational velocity () is critical for our understanding of processes related to the evolution of angular momentum in pre-main sequence stars. We pr…
2MASS J04435686+3723033 B: A Young Companion at the Substellar Boundary with Potential Membership in the Pictoris Moving Group
Caprice Phillips, Brendan Bowler, Gregory Mace +2
We present a detailed characterization of 2MASS J04435750+3723031, a low-mass companion orbiting the young M2 star, 2MASS J04435686+3723033, at 7.6 arcseconds (550 AU) with potenti…
The Mean Magnetic Field Strength of CI Tau
Kimberly R. Sokal, Christopher M. Johns-Krull, Gregory N. Mace +4
We present a blind comparison of two methods to measure the mean surface magnetic field strength of the classical T Tauri star CI Tau based on Zeeman broadening of sensitive spectr…
Chemical Abundances Of Open Clusters From High-Resolution Infrared Spectra. II. NGC 752
G. Böcek Topcu, M. Afsar, C. Sneden +9
We present a detailed near-infrared chemical abundance analysis of 10 red giant members of the Galactic open cluster NGC 752. High-resolution (R45000) near-infrared spectra…
Radial Velocities of Low-mass Candidate TWA Members
Benjamin Kidder, Gregory Mace, Kimberly Sokal +2
Nearby young moving groups provide unique samples of similar age stars for testing the evolution of physical properties. Incomplete and/or incorrect group membership classification…
Effective Temperatures of Low-Mass Stars from High-Resolution H-band Spectroscopy
Ricardo López-Valdivia, Gregory N. Mace, Kimberly R. Sokal +9
High-resolution, near-infrared spectra will be the primary tool for finding and characterizing Earth-like planets around low-mass stars. Yet, the properties of exoplanets can not b…
Chemical Abundances Of Open Clusters From High-Resolution Infrared Spectra. I. NGC 6940
G. Böcek Topcu, M. Afsar, C. Sneden +8
We present near-infrared spectroscopic analysis of 12 red giant members of the Galactic open cluster NGC 6940. High-resolution (R45000) and high signal-to-noise ratio (S/N…
Chandra Observations of the Massive Star-Forming Region Onsala 2
Stephen L. Skinner, Kimberly R. Sokal, Manuel Guedel
Previous radio and infrared observations have revealed an obscured region of high-mass star formation in Cygnus known as Onsala 2 (ON 2). Within this region lies the optically-reve…
Characterizing TW Hydra
Kimberly R. Sokal, Casey P. Deen, Gregory N. Mace +5
At 60 pc, TW Hydra (TW Hya) is the closest example of a star with a gas-rich protoplanetary disk, though TW Hya may be relatively old (3-15 Myr). As such, TW Hya is especially appe…
Inner warm disk of ESO H 279A revealed by NA I and CO overtone emission lines
A-Ran Lyo, Jongsoo Kim, Jae-Joon Lee +20
We present analysis of near-infrared, high-resolution spectroscopy towards the Flat-spectrum YSO (Young Stellar Object) ESO H 279a (1.5 solar mass) in the Serpens star forming r…
The Spectrum of SS 433 in the H and K Bands
E. L. Robinson, C. S. Froning, D. T. Jaffe +5
SS~433 is an X-ray binary and the source of sub-relativistic, precessing, baryonic jets. We present high-resolution spectrograms of SS 433 in the infrared H and K bands. The spectr…
New X-ray Detections of WNL Stars
Stephen L. Skinner, Svetozar A. Zhekov, Manuel Guedel +2
Previous studies have demonstrated that putatively single nitrogen-type Wolf-Rayet stars (WN stars) without known companions are X-ray sources. However, almost all WN star X-ray de…
Chandra Detects the Rare Oxygen-type Wolf-Rayet Star WR 142 and OB Stars in Berkeley 87
Kimberly R. Sokal, Stephen L. Skinner, Svetozar A. Zhekov +2
We present first results of a Chandra X-ray observation of the rare oxygen-type Wolf-Rayet star WR 142 (= Sand 5 = St 3) harbored in the young, heavily-obscured cluster Berkeley 87…
X-ray Emission from Nitrogen-Type Wolf-Rayet Stars
S. L. Skinner, S. A. Zhekov, M. Guedel +2
We summarize new X-ray detections of four nitrogen-type Wolf-Rayet (WR) stars obtained in a limited survey aimed at establishing the X-ray properties of WN stars across their full…
Chandra and Spitzer Imaging of the Infrared Cluster in NGC 2071
S. L. Skinner, K. R. Sokal, S. T. Megeath +5
We present results of a sensitive Chandra X-ray observation and Spitzer mid-IR observations of the infrared cluster lying north of the NGC 2071 reflection nebula in the Orion B mol…
X-ray Emission from the FU Orionis Star V1735 Cygni
S. L. Skinner, K. R. Sokal, M. Gudel +1
The variable star V1735 Cyg (= Elias 1-12) lies in the IC 5146 dark cloud and is a member of the class of FU Orionis objects whose dramatic optical brightenings are thought to be l…