We describe an ongoing effort to validate the estimated atmospheric parameters (Teff, log g, [Fe/H]) obtained from SDSS spectroscopy (R = 2000) and ugriz photometry, which are being employed for both the previous SDSS-I and the ongoing SEGUE surveys. The spectroscopic pipeline makes use of a number of methods for the estimation of each parameter
This section contains the publications database that collects IAC articles published in scientific journals. Please, click on the arrow to see full search filter and sort options: author, journal, year, etc..
It also provides access to IAC Preprints Repository here: https://research.iac.es/preprints/
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Calibration of the SDSS/SEGUE Spectroscopic PipelineSivarani, T. et al.122005
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Can solar g-modes be identified from ground-based velocity measurements
The question of whether or not solar g-modes can be detected and identified from ground observations is addressed. The limitation imposed by the Earth's atmosphere, the background solar noise spectrum at low frequencies, and a poor theoretical knowledge of these modes are mentioned. Using the best uninterrupted full disk velocity measurements
Garcia, C. et al.Advertised on:
121988 -
Can stellar winds account for temperature fluctuations in HII regions?. The case of NGC 2363
We compare the rate of kinetic energy injected by stellar winds into the extragalactic H II region NGC 2363 to the luminosity needed to feed the observed temperature fluctuations. The kinetic luminosity associated to the winds is estimated by means of two different evolutionary synthesis codes, one of which takes into account the statistical
Luridiana, V. et al.Advertised on:
122001 -
Can Voids and Superclusters trace Dark Energy?
Not Available
Hernandez-Monteagudo, C.Advertised on:
122011 -
Carbon and nitrogen abundances of stellar populations in the globular cluster M 2
We present CH and CN index analysis and C and N abundance calculations based on the low-resolution blue spectra of red giant branch (RGB) stars in the Galactic globular cluster NGC 7089 (M 2). Our main goal is to investigate the C-N anticorrelation for this intermediate metallicity cluster. The data were collected with DOLORES, the multiobject, low
Milone, A. P. et al.Advertised on:
122012 -
CCD imaging of NGC 4861: Ionized gas properties and stellar formation
This work undertakes the study of the galaxy NGC 4861, using imaging centered at the strong lines H-alpha, H-beta, (O III) lambda 5007 and nearby continua. Integrated, absolute fluxes of 28 H II regions, and the region known as the bright knot, have been measured showing correlations between the equivalent width of H-beta and the excitation index
Barth, Clarissa S. et al.Advertised on:
121994