Chemical compositions of five Planck cold clumps
نویسندگان
چکیده
منابع مشابه
Planck 2015 results - XXVIII. The Planck Catalogue of Galactic cold clumps
We present the Planck Catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the Early Cold Core (ECC) catalogue, which was made available in 2011 with the Early Release Compact Source Catalogue (ERCSC) and which contained 915 high signal-to-noise sources. It is based on the Planck 48-month missi...
متن کاملClouds , Clumps , Cores & Comets - a Cosmic Chemical Connection ?
We discuss the connection between the chemistry of dense interstellar clouds and those characteristics of cometary matter that could be remnants of it. The chemical evolution observed to occur in molecular clouds is summarized and a model for dense core collapse that can plausibly account for the isotopic fractionation of hydrogen, nitrogen, oxygen and carbon measured in primitive solar system ...
متن کاملCHEMICAL COMPOSITIONS OF LARGE CLUSTER IDPs
Introduction: We previously determined that ~10 µm interplanetary dust particles (IDPs) collected from the Earth's stratosphere are enriched in many moderately volatile elements by a factor of ~3 over the CI meteorites [1]. However, these IDP measurements provide no direct constraint on the bulk chemical composition of the parent body (or parent bodies) of the IDPs. Collisions are believed to b...
متن کاملChemical compositions of four barium stars
We obtain abundances of α, iron peak and neutron capture (n-capture) process elements in four Ba stars HD26886, HD27271, HD50082 and HD98839 based on high resolution, high signal-to-noise spectra. We find that all of these Ba stars are disk stars. Their α and iron peak elements are similar to the solar abundances. The n-capture process elements are overabundant relative to the Sun. In particula...
متن کاملCounting chemical compositions using Ehrhart quasi-polynomials
To count the number of chemical compositions of a particular mass, we consider an alphabet A with a mass function which assigns a mass to each letter in A. We then compute the mass of a word (an ordered sequence of letters) by adding the masses of the constituent letters. Our main interest is to count the number of words that have a particular mass, where we ignore the order of the letters with...
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: Astronomy & Astrophysics
سال: 2021
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/202039367