Results 51 to 60 of about 104,909 (264)
Why is the Milky Way X-factor Constant? [PDF]
, 2013 The CO-H2 conversion factor (Xco; otherwise known as the X-factor) is observed to be remarkably constant in the Milky Way and in the Local Group (aside from the SMC). To date, our understanding of why Xco should be so constant remains poor.
Hopkins, Philip, Narayanan, Desika
core +2 more sources
Short-lived Radionuclides in the Milky Way Galaxy [PDF]
EPJ Web of Conferences, 2023 The short-lived radionuclides (SLRs) have a half-life ≤ 100 Myr. The γ-ray observations and excess abundance of their daughter nuclides in various meteoritic phases confirm the existence of SLRs in the Galaxy and early solar system (ESS), respectively ...
Kaur Tejpreet
doaj +1 more source
How Common are the Magellanic Clouds? [PDF]
, 2011 We introduce a probabilistic approach to the problem of counting dwarf satellites around host galaxies in databases with limited redshift information.
Abazajian +33 more
core +2 more sources
Leo V: A Companion of a Companion of the Milky Way Galaxy? [PDF]
, 2008 We report the discovery of a new Milky Way satellite in the constellation Leo, identified in data from the Sloan Digital Sky Survey. It lies at a distance of ~180 kpc, and is separated by ≲3° from another recent discovery, Leo IV.
V. Belokurov +9 more
semanticscholar +1 more source
Infrared stellar populations in the central parts of the Milky Way galaxy [PDF]
, 2002 Near- and mid-IR survey data from DENIS and ISOGAL are used to investigate the structure and formation history of the inner 10 ◦ (1.4 kpc) of the Milky Way galaxy. Synthetic bolometric corrections and extinction coefficients in the near- and mid-infrared
J. V. Loon +9 more
semanticscholar +1 more source
Are ultra-diffuse galaxies Milky Way-sized? [PDF]
Astronomy & Astrophysics, 2020 Now almost 70 years since its introduction, the effective or half-light radius has become a very popular choice for characterising galaxy size. However, the effective radius measures the concentration of light within galaxies and thus does not capture our intuitive definition of size which is related to the edge or boundary of objects. For this reason,
Ignacio Trujillo +5 more
openaire +3 more sources
Overview of the DESI Milky Way Survey
The Astrophysical Journal, 2023 We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory.
Andrew P. Cooper +64 more
doaj +1 more source
Globular Cluster and Galaxy Formation: M31, the Milky Way and Implications for Globular Cluster Systems of Spiral Galaxies [PDF]
, 2004 The globular cluster (GC) systems of the Milky Way and of our neighboring spiral galaxy, M31, comprise 2 distinct entities, differing in 3 respects. 1. M31 has young GCs, ages from ~100 Myr to 5 Gyr old, as well as old globular clusters.
Bajaja E. +19 more
core +4 more sources
Grand challenges in Milky Way and galaxies [PDF]
Frontiers in Astronomy and Space Sciences, 2015 Extragalactic astronomy is a relatively young science. Its birth may be set at the time of the “greatdebate”betweenHarlowShapleyandHeberCurtisontheextragalacticnatureofthenebulae(whichculminated with a meeting of the two protagonists in April 1920) or, with a more conservativestance,afewyearslateratthetimeofEdwinHubble ...
openaire +3 more sources
A confirmed location in the Galactic halo for the high-velocity cloud 'chain A' [PDF]
, 1999 The high-velocity clouds of atomic hydrogen, discovered about 35 years ago, have velocities inconsistent with simple Galactic rotation models that generally fit the stars and gas in the Milky Way disk.
Kalberla, Peter M. W. +4 more
core +4 more sources