Főoldal     Alapinformációk     To Survive in the Universe    
Inhabited Sky
    News@Sky     Asztrofotók     Kollekció     Fórum     Blog New!     GYIK     Sajtó     Bejelentkezés  

HD 155458


Tartalom

Képek

Kép feltöltése

DSS Images   Other Images


Kapcsolódó cikkek

Rotation of stars in NGC 6134. A comparison of delta Scuti stars and non-variable stars
We present results of spectroscopic observations of selected stars inthe southern open cluster NGC 6134. We have determined the rotationalvelocities of the six known delta Scuti stars in NGC 6134 as well asseveral other non-variable stars with similar colour temperature inorder to investigate if v sin i and variability is somehow connected: wefind no such correlation. We also compare the distribution of v sin i ofdelta Scuti stars and non-variable stars with four other well-studiedopen clusters to look for any systematic behaviour, but we find noconclusive evidence for v sin i and variability to be connected. We havealso used the spectra to carry out an abundance analysis of the deltaScuti stars in NGC 6134 to confirm the high metal content of thecluster. We find [Fe/H] = +0.38+/-0.05 which is in agreement with theresult obtained from Strömgren photometry. We also present Delta aphotometry of the cluster, but we find no chemical peculiar stars basedon this index. Based in part on observations obtained at the EuropeanSouthern Observatory at La Silla and UTSO-Las Campanas, Chile.

Estimation of spectral classifications for bright southern stars with interesting Stromgren indices
This paper investigates the degree of success with which uvby photometrycan be applied to predict spectral classifications for 947 A, F, and Gstars brighter than an apparent magnitude of 8.3 and with four-colorindices indicating some kind of interesting, unusual, or peculiarspectrum. One or several possible spectral classifications are estimatedfor each star from photometry alone, double stars are distinguished, andthe estimates are compared with published classifications. The resultsshow that the framework provided by uvby photometry can be extended toinclude most G and K stars, reddened stars, peculiar stars, and certaintypes of double star.

Új cikk hozzáadása


Kapcsolódó hivatkozások

  • - (nincs kapcsolódó hivatkozás) -
Új link hozzáadása


Besorolás csoportokba:


Pozíciós és asztrometriai adatok

Csillagkép:Kígyótartó
Rektaszcenzió:17h11m48.45s
Deklináció:-03°20'54.5"
Vizuális fényesség:8.202
Távolság:218.341 parszek
RA sajátmozgás:-24.7
Dec sajátmozgás:-9.1
B-T magnitude:8.988
V-T magnitude:8.267

Katalógusok és elnevezések:
Megfelelő nevek   (Edit)
HD 1989HD 155458
TYCHO-2 2000TYC 5069-1193-1
USNO-A2.0USNO-A2 0825-10174741
HIPHIP 84116

→ További katalógusok és elnevezések lekérése VizieR-ből