91 citations · 323 across the 11 of their papers we have counts for
11 papers
Hunting for Planetary Nebulae toward the Galactic Center
Jihye Hong, Janet P. Simpson, Deokkeun An +2
We present near-infrared (IR) spectra of two planetary nebula (PN) candidates in close lines of sight toward the Galactic center (GC) using the Gemini Near-Infrared Spectrograph (G…
Abundant Methanol Ice toward a Massive Young Stellar Object in the Central Molecular Zone
Deokkeun An, Kris Sellgren, A. C. Adwin Boogert +2
Previous radio observations revealed widespread gas-phase methanol (CHOH) in the Central Molecular Zone (CMZ) at the Galactic center (GC), but its origin remains unclear. Here,…
The Galactic Center: Not an Active Galactic Nucleus
Deokkeun An, Solange V. Ramírez, Kris Sellgren
We present 10um-35um Spitzer spectra of the interstellar medium in the Central Molecular Zone (CMZ), the central 210 pc x 60 pc of the Galactic center (GC). We present maps of the…
The PTF Orion Project: a Possible Planet Transiting a T-Tauri Star
Julian C. van Eyken, David R. Ciardi, Kaspar von Braun +35
We report observations of a possible young transiting planet orbiting a previously known weak-lined T-Tauri star in the 7-10 Myr old Orion-OB1a/25-Ori region. The candidate was fou…
The Palomar Transient Factory Orion Project: Eclipsing Binaries and Young Stellar Objects
Julian C. van Eyken, David R. Ciardi, Luisa M. Rebull +25
The Palomar Transient Factory (PTF) Orion project is an experiment within the broader PTF survey, a systematic automated exploration of the sky for optical transients. Taking advan…
Massive Young Stellar Objects in the Galactic Center. I. Spectroscopic Identification from Spitzer/IRS Observations
Deokkeun An, Solange V. Ramírez, Kris Sellgren +7
We present results from our spectroscopic study, using the Infrared Spectrograph (IRS) onboard the Spitzer Space Telescope, designed to identify massive young stellar objects (YSOs…
Spitzer Observations of IC 2118
S. Guieu, L. M. Rebull, J. R. Stauffer +13
IC 2118, also known as the Witch Head Nebula, is a wispy, roughly cometary, ~5 degree long reflection nebula, and is thought to be a site of triggered star formation. In order to s…
First Spectroscopic Identification of Massive Young Stellar Objects in the Galactic Center
Deokkeun An, Solange V. Ramírez, Kris Sellgren +7
We report the detection of several molecular gas-phase and ice absorption features in three photometrically-selected young stellar object (YSO) candidates in the central 280 pc of…
The Mid-Infrared Colors of the ISM and Extended Sources at the Galactic Center
R. G. Arendt, S. R. Stolovy, S. V. Ramírez +6
A mid-infrared (3.6-8 um) survey of the Galactic Center has been carried out with the IRAC instrument on the Spitzer Space Telescope. This survey covers the central 2x1.4 degree (~…
Detection of Dynamical Structures Using Color Gradients in Galaxies
A. C. Quillen, Solange V. Ramírez, Jay A. Frogel
We describe a technique that uses radial color gradients in disk galaxies to detect the presence of bulk non-circular motion or elliptical orbits. In a disk galaxy with both a radi…
The Dwarf Galaxy NGC 1705 -- A Highly Composite Stellar Population
A. C. Quillen, Solange V. Ramírez, Jay A. Frogel
We present visible and near-infrared images of the amorphous dwarf galaxy NGC 1705 in the , , , , , and bands. Optical and near infrared colors in the galaxy are…