151 citations · 2k across the 56 of their papers we have counts for
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WIYN Open Cluster Study 1: Deep Photometry of NGC 188
Ted von Hippel, Ata Sarajedini
We have employed precise V and I photometry of NGC 188 at WIYN to explore the cluster luminosity function (LF) and study the cluster white dwarfs (WDs). Our photometry is offset by…
Semi-automated Extraction of Digital Objective Prism Spectra
Coryn A. L. Bailer-Jones, Mike Irwin, Ted von Hippel
We describe a method for the extraction of spectra from high dispersion objective prism plates. Our method is a catalogue driven plate solution approach, making use of the Right As…
Automated Classification of Stellar Spectra. II: Two-Dimensional Classification with Neural Networks and Principal Components Analysis
Coryn A. L. Bailer-Jones, Mike Irwin, Ted von Hippel
We investigate the application of neural networks to the automation of MK spectral classification. The data set for this project consists of a set of over 5000 optical (3800-5200 A…
Contribution of White Dwarfs to Cluster Masses
Ted von Hippel
I present a literature search through 31 July 1997 of white dwarfs (WDs) in open and globular clusters. There are 36 single WDs and 5 WDs in binaries known among 13 open clusters,…
Detection of intergalactic red-giant-branch stars in the Virgo cluster
Henry C. Ferguson, Nial R. Tanvir, Ted von Hippel
It has been suspected for nearly 50 years that clusters of galaxies contain a population of intergalactic stars, ripped from galaxies during cluster formation or when the galaxies'…