The proper motion of BD+33°99
نویسندگان
چکیده
منابع مشابه
On the Crab Proper Motion
Owing to the dramatic evolution of telescopes as well as optical detectors in the last 20 yrs, we are now able to measure anew the proper motion of the Crab pulsar, after the classical result of Wyckoff and Murray (1977) in a time span 40 times shorter. The proper motion is aligned with the axis of symmetry of the inner Crab nebula and, presumably, with the pulsar spin axis.
متن کاملThe Liverpool-Edinburgh High Proper Motion Survey
We present a catalogue of 6206 stars which have proper motions exceeding 0.18yr with an R-band faint magnitude limit of 19·5mag. This catalogue has been produced using SuperCOSMOS digitized R-Band ESO and UK Schmidt Plates in 131 Schmidt fields covering more than 3,000 square degrees (>7·5% of the whole sky) at the South Galactic Cap. The survey is ≥90% complete within the nominal limits of the...
متن کاملProper motion in Cygnus A
Our recent VLBI observations of the prominent FR II radio galaxy Cygnus A with the EVN and the VLBA reveal a pronounced two-sided jet structure. from which we could derive the kinematics of the jet and counter-jet. On the jet side and on mas scales, the jet seems to accelerate from βapp ≈ 0.1 − 0.2 (Krichbaum et al. 1998) at core-separations near 1 mas to βapp ≈ 0.4 − 0.6 at r ≥ 4 mas (H0 = 100...
متن کاملThe Proper Motion of the Local Group Galaxy IC 10
We have measured the proper motion of the Local Group galaxy IC 10 with the Very Long Baseline Array by measuring the position of an H 2 O maser relative to two background quasars over 4.3 years. After correction for the rotation of the Milky Way and IC 10, we obtain a motion of –39±9 µas yr −1 toward the East and 31±8 µas yr −1 toward the North. This corresponds to a total space velocity of 21...
متن کاملThe Kinematics of High Proper Motion Halo White Dwarfs
We analyse the kinematics of the entire spectroscopic sample of 99 recently discovered high proper-motion white dwarfs by Oppenheimer et al. using a maximum-likelihood analysis, and discuss the claim that the high-velocity white dwarfs are members of a halo population with a local density at least ten times greater than traditionally assumed. We argue that the observations, as reported, are con...
متن کاملذخیره 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: Astronomische Nachrichten
سال: 1911
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19111871904