81 datasets found

Debris disks are the natural by-products of the planet formation process. Scatte red or polarized light observations are mostly sensitive to small dust grains that are released...

Breakthrough direct detections of planetary companions orbiting A-type stars confirm the existence of massive planets at relatively large separations, but dedicated surveys are...

Differential Stroemgren uvby observations from the Four College Automated Photoelectric Telescope are presented for the magnetic Chemically Peculiar (mCP) stars HD 32633, Aur,...

Differential Stroemgren uvby observations from the Four College Automated Photoelectric Telescope are presented for the magnetic CP (mCP) stars HR 2258, MW Vul, and HR 9017 and...

Effective temperatures (T_eff_) can be determined from (V-J)0, (V-H)0 and (V-K)0 colours that are derived from 2MASS magnitudes. This gives another way to estimate the T_eff_ of...

There are given 1064 profiles of the hydrogen lines H{gamma} and H{delta} for 235 B,A,F-stars obtained at the Main Stellar Spectrograph of the 6-m telescope in 1978-1986 in the...

This catalog presents new radial velocity determinations, based on 2nm/mm Coude plates, for 146 southern stars brighter than m(v)=8.3. Drawn from the catalog of uvby-{beta}...

The photoelectric measurements of the strength of the Calcium K-line has been extended by 223 stars of predominantly southern or equatorial declinations which are well...

A narrow-band spectrometer, compensated for seeing and transparency variations, has been constructed and used to measure the strength of the calcium K-line (3933.68{AA}) in 146...

We present chemical composition and fundamental parameters (the effective temperature, surface gravity and radius) for four sharp-lined A-type stars gamma Gem (HD 41705),...

Kepler photometry of A stars shows that a considerable fraction (about 19 per cent) have a peculiar feature in the periodogram. This feature consists of a broad peak, thought to...

As a part of our ongoing Volume-limited A-Star (VAST) adaptive optics survey, we have obtained observations of 26 binary systems with projected separations <100AU, 13 of...

We present detailed parameter determinations of two chemically normal late A-type stars, HD 32115 and HD 37594, to uncover the reasons behind large discrepancies between two...

Position, estimated magnitudes, and finding charts are provided for 540 A-F stars in the region 8h00m <R.A< 11h10m and +29.0 <Decl.<+43.0 (1950). The Galactic...

Positions, estimated magnitudes, and finding charts (when needed) are provided for 183 A-F stars (including both Population I and horizontal-branch stars) contained within the...

We have performed detailed high-resolution spectroscopic analysis on seven metal-poor stars (BD+75348, BD+093019, HD238020, HE0319-0215, HE0507-1653, HE0930-0018, HE1023-1504)...

The recently rediscovered open cluster Stock2, located roughly 375pc away and about 400Myr old, has the potential to be an exciting new testbed for our understanding of stellar...

We present far- and near-ultraviolet absorption spectroscopy of the ~23Myr edge-on debris disk surrounding the A0V star {eta}Telescopii, obtained with the Hubble Space Telescope...

We report the discovery of HATS-70b, a transiting brown dwarf at the deuterium burning limit. HATS-70b has a mass of M_p_=12.9_-1.6_^+1.8^ M_Jup_ and a radius of...

We present the discovery of seven new planets and eight planet candidates around subgiant stars, as additions to the known sample of planets around "retired A stars". Among...