Publications (19)
Anisotropy of Thermal Conductivity of Free-Standing Reduced Graphene Oxide Films Annealed at High Temperature
J. D. Renteria, S. Ramirez, H. Malekpour +6
We investigated thermal conductivity of free-standing reduced graphene oxide films subjected to a high-temperature treatment of up to 1000 C. It was found that the high-temperature…
Precision stellar radial velocity measurements with FIDEOS at the ESO 1-m telescope of La Silla
L. Vanzi, A. Zapata, M. Flores +10
We present results from the commissioning and early science programs of FIDEOS, the new high-resolution echelle spectrograph developed at the Centre of Astro Engineering of Pontifi…
Abundance Patterns in Stars in the Bulge and Galactic Center
K. Cunha, V. Smith, K. Sellgren +3
We discuss oxygen and iron abundance patterns in K and M red-giant members of the Galactic bulge and in the young and massive M-type stars inhabiting the very center of the Milky W…
An Accurate, Easy to Use Abundace Scale for Globular Clusters Based on 2.2um Spectra of Giant Stars
J. A. Frogel, A. W. Stephens, S. Ramirez +1
We present a new method for the determination of [Fe/H] for globular clusters. This new method is based on moderate resolution (R~1500) near-IR spectroscopy in the K-band of 6 to 1…
Magnetically-Functionalized Self-Aligning Graphene Fillers for High-Efficiency Thermal Management Applications
J. Renteria, S. Legedza, R. Salgado +5
We report on heat conduction properties of thermal interface materials with self-aligning "magnetic grapheme" fillers. Graphene enhanced nano-composites were synthesized by an inex…
Chandra Observation of the Trifid Nebula: X-ray emission from the O star complex and actively forming pre-main sequence stars
J. Rho, S. Ramirez, M. F. Corcoran +2
The Trifid Nebula, a young star-forming HII region, was observed for 16 hours by the Chandra X-ray Observatory. We detected 304 X-ray sources, thirty percent of which are hard sour…
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…
Interstellar Extinction and Long-Period Variables in the Galactic Center
M. Schultheis, K. Sellgren, S. Ramirez +4
We use the Spitzer IRAC catalogue of the Galactic Center (GC) point sources (Ramirez et al. 2008) and combine it with new isochrones (Marigo et al. 2008) to derive extinctions base…
The NStED Exoplanet Transit Survey Service
K. von Braun, M. Abajian, B. Ali +15
The NASA Star and Exoplanet Database (NStED) is a general purpose stellar archive with the aim of providing support for NASA's planet finding and characterization goals, stellar as…
The NStED Stellar and Exoplanet Hosting Star Service
S. Ramirez, B. Ali, R. Baker +14
The NASA Star and Exoplanet Database (NStED) is a general purpose stellar archive with the aim of providing support for NASA's planet finding and characterization goals, stellar as…
OGLE-TR-211 - a new transiting inflated hot Jupiter from the OGLE survey and ESO LP666 spectroscopic follow-up program
A. Udalski, F. Pont, D. Naef +24
We present results of the photometric campaign for planetary and low-luminosity object transits conducted by the OGLE survey in 2005 season (Campaign #5). About twenty most promisi…
Star Formation in the Central 400 pc of the Milky Way: Evidence for a Population of Massive YSOs
F. Yusef-Zadeh, J. W. Hewitt, R. G. Arendt +8
The central kpc of the Milky Way might be expected to differ significantly from the rest of the Galaxy with regard to gas dynamics and the formation of YSOs. We probe this possibil…
The LAEX and NASA portals for CoRoT public data
E. Solano, K. von Braun, A. Velasco +22
* Aims. We describe here the main functionalities of the LAEX (Laboratorio de Astrofisica Estelar y Exoplanetas/Laboratory for Stellar Astrophysics and Exoplanets) and NASA portals…
A transiting planet among 23 new near-threshold candidates from the OGLE survey - OGLE-TR-182
F. Pont, O. Tamuz, A. Udalski +24
By re-processing the data of the second season of the OGLE survey for planetary transits and adding new mesurements on the same fields gathered in subsequent years with the OGLE te…
The NASA/IPAC/NExScI Star and Exoplanet Database
G. B. Berriman, B. Ali, R. Baker +14
The NASA/IPAC/NExScI Star and Exoplanet Database (NStED) is a general purpose stellar archive which supports NASA planet-finding and planet-characterization goals, stellar astrophy…
Thermal and Magnetic Properties of Nanostructured Ferrimagnetic Composites with Graphene - Graphite Fillers
S. Ramirez, K. Chan, R. Hernandez +6
We report the results of an experimental study of thermal and magnetic properties of nanostructured ferrimagnetic iron oxide composites with graphene and graphite fillers synthesiz…
The Potential of Exozodiacal Disks Observations with the WFIRST Coronagraph Instrument
B. Mennesson, V. Bailey, J. Kasdin +60
The Wide Field Infrared Survey Telescope (WFIRST) Coronagraph Instrument (CGI) will be the first high-performance stellar coronagraph using active wavefront control for deep starli…
Magnetic and Thermal Transport Properties of Permanent Magnets with Anisotropic Grain Structure
A. D. Volodchenkov, S. Ramirez, R. Samnakay +4
Nanostructured permanent magnets are gaining increasing interest and importance for applications such as generators and motors. Thermal management is a key concern since performanc…
The stellar population of the star forming region G61.48+0.09
A. Marin-Franch, A. Herrero, A. Lenorzer +4
- Context: We present the results of a near-infrared photometric and spectroscopic study of the star forming region G61.48+0.09. - Aims: The purpose of this study is to characteriz…