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NICMOS transmission spectroscopy of HD 189733b: controversy becomes confirmation
techniques spectroscopic methods data analysis planets and satellites atmospheres planets and satellites composition
2010/11/10
Spectral features corresponding to methane and water opacity were reported based on spectroscopic observations of HD 189733b with Hubble/NICMOS. Recently,these data, and other NICMOS exoplanet spectro...
Chemical abundance ratios of galactic globular clusters from modelling integrated light spectroscopy
galactic globular clusters light spectroscopy
2011/1/10
We use our new, flux-calibrated stellar population model of absorption-line indices to derive ages, metallicities, and various element abundance ratios from integrated light spectroscopy of galactic g...
A nearby GRB host prototype for z~7 Lyman-break galaxies: Spitzer-IRS and X-shooter spectroscopy of the host galaxy of GRB031203
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
Gamma-ray burst (GRB) host galaxies have been studied extensively in optical photometry and spectroscopy. Here we present the first mid-infrared spectrum of a GRB host, HG031203. It is one of the near...
A new look at NICMOS transmission spectroscopy of HD189733, GJ-436 and XO-1: no conclusive evidence for molecular features
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/28
We present a re-analysis of archival HST/NICMOS transmission spectroscopy of three exoplanet systems; HD 189733, GJ-436 and XO-1. Detections of several molecules, including H20, CH4 and CO2, have been...
Strong Constraints to the Putative Planet Candidate around VB 10 using Doppler spectroscopy
astrometry methods statistical stars individual (VB 10) tech-niques radial velocities
2010/3/8
We present new radial velocity measurements of the ultra-cool dwarf VB 10, which was recently announced to host a giant planet detected with astrometry. The new observations were obtained using optica...
Cosmic star formation history revealed by the AKARI, & Spatially-resolved spectroscopy of an E+A (Post-starburst) system
evolution galaxies:starburst
2010/3/8
We reveal cosmic star-formation history obscured by dust using deep infrared observation with the AKARI. A continuous filter coverage in the mid-IR wavelength (2.4, 3.2, 4.1, 7, 9, 11, 15, 18, and 24u...
Calcium and light-elements abundance variations from high resolution spectroscopy in globular clusters
abundances stars evolution globular clusters general
2010/3/8
We use abundances of Ca, O, Na, Al from high resolution UVES spectra of 200 red giants in 17 globular clusters (GCs) to investigate the correlation found by Lee et al. (2009) between chemical enrichme...