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researcher

A. Koch-Hansen

27 papers hereh-index 6136 citations34 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • first author4
  • middle author19
  • last author2

Across the 25 of 27 papers where every author was matched, so the position is known.

fields
  • astro-ph.GA21
  • astro-ph.SR6

identity via Semantic Scholar / OpenAlex

activity
20202026
most citedPurveyors of fine halos. II. Chemodynamical association of halo stars with Milky Way globular clusters

33 citations · 158 across the 27 of their papers we have counts for

collaborators
Showing 2022Show all

3 papers · 1 filter

astro-ph.GA2022

Blanco DECam Bulge Survey (BDBS) IV: Metallicity Distributions and Bulge Structure from 2.6 Million Red Clump Stars

Christian I. Johnson, R. Michael Rich, Iulia T. Simion +12

We present photometric metallicity measurements for a sample of 2.6 million bulge red clump stars extracted from the Blanco DECam Bulge Survey (BDBS). Similar to previous studies,…

astro-ph.GA2022★ 10 cited

Blanco DECam Bulge Survey (BDBS) V. Cleaning the foreground populations from Galactic bulge colour-magnitude diagrams using Gaia EDR3

Tommaso Marchetti, Christian I. Johnson, Meridith Joyce +8

The Blanco DECam Bulge Survey (BDBS) has imaged more than 200 square degrees of the southern Galactic bulge, providing photometry in the ugrizy filters for ∼250 million uniqu…

astro-ph.GA2022★ 23 cited

Milky Way archaeology using RR Lyrae and type II Cepheids II. High velocity RR Lyrae stars, and mass of the Milky Way

Z. Prudil, A. J Koch-Hansen, B. Lemasle +10

We report the discovery of high velocity candidates among RR~Lyrae stars found in the Milky Way halo. We identified 9 RR~Lyrae stars with Galactocentric velocities exceeding the lo…

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