Colour Excesses of 74 Supergiants and 30 Classical Cepheids
| hal.structure.identifier | Astronomical observatory of Odessa National University [Odessa] | |
| dc.contributor.author | KOVTYUKH, V. V. | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| dc.contributor.author | SOUBIRAN, C. | |
| hal.structure.identifier | Odessa Astronomical Observatory | |
| dc.contributor.author | BELIK, S. I. | |
| dc.contributor.author | YASINSKAYA, M. P. | |
| dc.contributor.author | CHEHONADSKIH, F. A. | |
| dc.contributor.author | MALYUTO, V. | |
| dc.date.issued | 2007 | |
| dc.description.abstractEn | We derive accurate, homogeneous atmospheric parameters (Teff , log g, Vt, [Fe/H]) for 74 FGK non-variable supergiants and for 30 classical cepheids in 302 pulsation phases based on the highresolution, high signal-to-noise echelle spectra. The extremely high precision of the effective temperature determination (10-30 K) is achieved by using the line-depth ratio method. These parameters are correlated with unreddened B-V colour index compiled from the literature for investigated stars to obtain an empirical relationship of the form (B-V )0 = 57.984 - 10.3587(logTeff )2 + +1.67572(logTeff )3 - 3.356logg + 0.0321Vt+ +0.2615[Fe/H] + 0.8833(logg)(logTeff) This expression have been used for the estimation of the colour excesses E(B-V) of individual supergiants and classical cepheids with an error 0.05 mag, which matches precision of the most sophisticated photometric techniques. The application range is F0-K0, luminosity classes I and II. Considering the large distances of supergiants, this method opens up a possibility for the large-scale extinction mapping of the Galaxy, with sensitivity down to 0.1-0.2 mag. | |
| dc.language.iso | en | |
| dc.publisher | AstroPrint | |
| dc.subject.en | Stars: fundamental parameters | |
| dc.subject.en | stars: colour excesses | |
| dc.subject.en | stars: supergiants | |
| dc.subject.en | stars: classical cepheids | |
| dc.subject.en | stars: classical cepheids. | |
| dc.title.en | Colour Excesses of 74 Supergiants and 30 Classical Cepheids | |
| dc.type | Article de revue | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| bordeaux.journal | Odessa Astronomical Publications | |
| bordeaux.page | 91 | |
| bordeaux.volume | 20 | |
| bordeaux.peerReviewed | non | |
| hal.identifier | hal-00403544 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00403544v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Odessa%20Astronomical%20Publications&rft.date=2007&rft.volume=20&rft.spage=91&rft.epage=91&rft.au=KOVTYUKH,%20V.%20V.&SOUBIRAN,%20C.&BELIK,%20S.%20I.&YASINSKAYA,%20M.%20P.&CHEHONADSKIH,%20F.%20A.&rft.genre=article |
Fichier(s) constituant ce document
| Fichiers | Taille | Format | Vue |
|---|---|---|---|
|
Il n'y a pas de fichiers associés à ce document. |
|||