Publications of the Astronomical Society of the Pacific, Vol. 113, No. 783 (May 2001), pp. 548-566 (19 pages) ABSTRACT An atlas of a thorium‐argon hollow cathode lamp in selected intervals of the ...

Astronomers rely on clear observations to study celestial objects, but cosmic dust alters what we see, making stars appear ...

Black hydrogen absorption lines are at the same wavelength as the bright hydrogen emission lines. Key fact Line emission spectra are unique to a particular element. Different elements produce ...

The types of radiation that occur in different parts of the spectrum have different uses and dangers - depending on their wavelength and frequency. The speed of electromagnetic waves in a vacuum ...

Sub-wavelength optics is the study of light on a spatial scale smaller than its wavelength. Conventionally, the minimum length scale on which a beam of light can operate is equal to half its ...

This supplement is an update of Technical Report Series No. 318, Compendium of Neutron Spectra and Detector Responses for Radiation Protection Purposes (1990), that takes into account the major ...

Of the 220 million spectra released by the Gaia mission in ... show where the extinction of light is more dependent on the wavelength of the light, whereas extinction is not so dependent on ...

The Gaia spectra are low-resolution, that is, the way that they separate light into different wavelength regions is comparatively coarse. The two astronomers found a way around that limitation ...

Astronomers at the Max Planck Institute for Astronomy have created the most comprehensive three-dimensional map of the characteristics of cosmic dust in the Milky Way galaxy, according to a study ...

In this work, we describe and test a novel RV extraction pipeline dedicated to retrieving RVs from low-mass stars using NIR spectra taken by the CSHELL spectrograph at the NASA Infrared Telescope ...