6 A ug 2 00 8 Interstellar Krypton Abundances : The Detection of Kiloparsec - scale Differences in Galactic Nucleosynthetic History
نویسنده
چکیده
We present an analysis of Kr I λ1236 line measurements from 50 sight lines in the Hubble Space Telescope Space Telescope Imaging Spectrograph and Goddard High Resolution Spectrograph data archives that have sufficiently high resolution and signal-to-noise ratio to permit reliable krypton-to-hydrogen abundance ratio determinations. The distribution of Kr/H ratios in this sample is consistent with a single value for the ISM within 5900 pc of the Sun, log10(Kr/H) = −9.02±0.02,
منابع مشابه
The Homogeneity of Interstellar Krypton in the Galactic Disk
We present an analysis of high resolution HST Space Telescope Imaging Spectrograph (STIS) observations of Kr I λ1236 absorption in seven sight lines that probe a variety of interstellar environments. In combination with krypton and hydrogen column densities derived from current and archival STIS and FarUltraviolet Spectroscopic Explorer data, the number of sight lines with reliable Kr/H ISM abu...
متن کاملSpallation dominated propagation of Heavy Cosmic Rays and the Local Interstellar Medium ( LISM )
Measurements of ultra heavy nuclei at GeV/n energies in the galactic cosmic radiation address the question of the sources (nucleosynthetic sand r-processes). As such, the determination of CR source abundances is a promising way to discriminate between existing nucleosynthesis models. For primary species (nuclei present and accelerated at sources), it is generally assumed that the relative propa...
متن کاملar X iv : a st ro - p h / 01 11 10 9 v 1 6 N ov 2 00 1 Big Bang Nucleosynthesis , Population III , and Stellar Genetics in the Galactic Halo ∗ Sean
The diverse isotopic and elemental signatures produced in different nucleosynthetic sites are passed on to successive generations of stars. By tracing these chemical signatures back through the stellar populations of the Galaxy, it is possible to unravel its nucleosynthetic history and even to study stars which are now extinct. This review considers recent applications of ”stellar genetics” to ...
متن کاملar X iv : a st ro - p h / 02 08 55 6 v 2 3 0 A ug 2 00 2 Galactic Environment of the Sun and Stars : Interstellar and Interplanetary Material
Interstellar material surrounding an extrasolar planetary system interacts with the stellar wind to form the stellar astrosphere, and regulates the properties of the interplanetary medium and cosmic ray fluxes throughout the system. Advanced life and civilization developed on Earth during the time interval when the Sun was immersed in the vacuum of the Local Bubble and the heliosphere was large...
متن کاملar X iv : a st ro - p h / 02 08 55 6 v 1 3 0 A ug 2 00 2 Galactic Environment of the Sun and Stars : Interstellar and Interplanetary Material
Interstellar material surrounding an extrasolar planetary system interacts with the stellar wind to form the stellar astrosphere, and regulates the properties of the interplanetary medium and cosmic ray fluxes throughout the system. Advanced life and civilization developed on Earth during the time interval when the Sun was immersed in the vacuum of the Local Bubble and the heliosphere was large...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008