منابع مشابه
Galaxy Distances via Rotational Parallaxes
Astrometry is one of the foundations of astrophysics. Accurate distances to stars and galaxies allow for significant tests of stellar evolution, galaxy formation and evolution and cosmology. NASA’s Space Interferometry Mission (SIM) will obtain extraordinary precision astrometry [1-10 μas positional accuracy] for ten to twenty thousand objects brighter than V=20 mag. In this paper we discuss a ...
متن کاملTransverse Velocities of Galaxies From Microlens Parallaxes
The transverse velocity of a spiral galaxy can be measured to an accuracy 60 km s 1 by making parallax observations of quasars being microlensed by stars in the disk of the galaxy. To make the measurement, a quasar must be located behind the disk of the galaxy between about 1 and 2 scale lengths from the center. The quasar must then be monitored for microlensing events and the events followed s...
متن کاملNormal Nearby Galaxies *
Following on from IRAS, ISO has provided a huge advancement in our knowledge of the phenomenology of the infrared (IR) emission of normal galaxies and the underlying physical processes. Highlights include: the discovery of an extended cold dust emission component, present in all types of gas-rich galaxies and carrying the bulk of the dust luminosity; the definitive characterisation of the spect...
متن کاملInterferometric observations of nearby galaxies
This contribution presents a short overview about the investigation of the molecular gas content of nearby galaxies using the Plateau de Bure Interferometer. I try to give a rather complete list of recent references, and explicit descriptions are given for objects under study at RAI Bonn. They comprise very different types of galaxies such as Haro 2, Mrk 297, M82, NGC2146, M31 and NGC4258. All ...
متن کاملDense gas in nearby galaxies ?
The J = 3 − 2 sub-mm line of 12CO has been observed with the Heinrich-Hertz-Telescope (HHT) toward a sample of 28 nearby galaxies, and toward Arp 220. All sources are detected. This is the largest extragalactic sample of CO 3 − 2 spectra published so far. The 3 − 2 line fluxes, I32, are compared to 1 − 0 and 2 − 1 fluxes measured with the IRAM 30m telescope. Model calculations show that the I32...
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: Proceedings of the International Astronomical Union
سال: 2012
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921312021448