Főoldal     To Survive in the Universe    
Services
    Why to Inhabit     Top Contributors     Asztrofotók     Kollekció     Fórum     Blog New!     GYIK     Bejelentkezés  
→ Adopt this star  

HD 142821


Tartalom

Képek

Kép feltöltése

DSS Images   Other Images


Kapcsolódó cikkek

Pulsation in the pre-main-sequence Herbig Ae star HD 142666
Asteroseismology of pre-main-sequence δ Scuti stars has thepotential not only to provide unprecedented constraints on models ofthese stars, but also to allow for the possibility of detectingevolutionary period changes, thus providing a direct measure of thepre-main-sequence evolutionary time-scale. In the last two years, thepublished number of such stars known has doubled from four to eight.Searches are now being conducted amongst the Herbig Ae stars, which areconsidered to be excellent candidates. We announce the discovery ofδ Scuti pulsation in one Herbig Ae star, HD 142666, which lieswithin Marconi & Palla's theoretically predicted instability stripfor pre-main-sequence stars, making this the ninth knownpre-main-sequence δ Scuti star. We also demonstrate a lack ofδ Scuti pulsation in another such star, HD 142527.

A homogeneous catalog of new UBV and H-beta photometry of B- and A-type stars in and around the Scorpius-Centaurus OB association
B- and A-type stars in and near the Sco-Cen OB association areinvestigated with UBV and H-beta photometry to acquire data relevant tothe luminosity function of Sco-Cen. The measurements generally consistof two 10-s integrations of U, B, V, (W, N) filters, and theobservations are corrected iteratively for atmospheric extinction andinstrumental response. The data presented give the mean V magnitude,mean B-V, mean U-B, and the estimated uncertainties for these values.The catalog provides a homogeneous catalog of data for a large fieldwith stellar objects delineating membership to the association Sco-Cenand that affect the luminosity function of the aggregate.

Mitteilungen uber Veranderliche der Bamberger Liste.
Not Available

Új cikk hozzáadása


Kapcsolódó hivatkozások

  • - (nincs kapcsolódó hivatkozás) -
Új link hozzáadása


Besorolás csoportokba:


Pozíciós és asztrometriai adatok

Csillagkép:Farkas
Rektaszcenzió:15h58m19.75s
Deklináció:-41°39'34.6"
Vizuális fényesség:7.916
Távolság:266.667 parszek
RA sajátmozgás:-6.9
Dec sajátmozgás:-9.1
B-T magnitude:8.097
V-T magnitude:7.931

Katalógusok és elnevezések:
Megfelelő nevek
HD 1989HD 142821
TYCHO-2 2000TYC 7846-212-1
USNO-A2.0USNO-A2 0450-22623428
HIPHIP 78215

→ További katalógusok és elnevezések lekérése VizieR-ből