The Galactic Rotation Effect in Late Type Stars

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Rotation of Late-type Stars in Praesepe with K2

We have Fourier-analyzed 941 K2 light curves (LCs) of likely members of Praesepe, measuring periods for 86% and increasing the number of rotation periods (P) by nearly a factor of four. The distribution of P versus ( ) V Ks , a mass proxy, has three different regimes: ( ) V Ks <1.3, where the rotation rate rapidly slows as mass decreases; 1.3< ( ) V Ks <4.5, where the rotation rate slows ...

متن کامل

Rotation of Hot Horizontal Branch Stars in Galactic Globular Clusters

We present high resolution UVES+VLT spectroscopic observations of 61 stars in the extended blue horizontal branches of the Galactic globular clusters NGC 1904 (M79), NGC 2808, NGC 6093 (M80), and NGC 7078 M15). Our data reveal for the first time the presence in NGC 1904 of a sizable population of fast (vsini ≥ 20 km/s) horizontal branch (HB) rotators, confined to the cool end of the EHB, simila...

متن کامل

Rotation and lithium in the late - type stars of NGC 2516

We present CCD photometry and high resolution spectroscopy of low-mass stars in the open cluster NGC 2516, which has an age of about 150 Myr and may have a much lower metallicity than the Pleiades. Twenty four probable F to early K type, single cluster members have been identiied from their photometry and radial velocities, along with three possible spectroscopic binaries. The projected equator...

متن کامل

On the potassium-rotation connection in late-type Alpha Persei stars

We present measurements of the K  λ7699 line from spectra of 19 late-type members of the αPersei cluster obtained with the Intermediate Dispersion Spectrograph at the Isaac Newton Telescope. These stars span a narrow range of Teff , from 5091 K to 4771 K, and a wide range of v sin i values (9 km s−1–170 km s−1). For a given star, we find empirically that larger rotational broadening apparently...

متن کامل

Early type stars at high galactic latitudes

We present the result of differential spectral analyses of a further four apparently normal B-type stars. Abundance anomalies (e.g. He, C, N enrichment), slow rotation and/or high gravities suggest that the programme stars are evolved low-mass B-type stars. In order to trace their evolutionary status several scenarios are discussed. Post-AGB evolution can be ruled out. PG 0229+064 and PG 1400+3...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Monthly Notices of the Royal Astronomical Society

سال: 1930

ISSN: 0035-8711,1365-2966

DOI: 10.1093/mnras/90.7.690