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- California Institute of TechnologyUS4 papers
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6 papers · 1 filter
Exotic relation modules and homotopy types for certain 1-relator groups
Jens Harlander, Jacqueline A Jensen
Using stably free non-free relation modules we construct an infinite collection of 2-dimensional homotopy types, each of Euler-characteristic one and with trefoil fundamental group…
Carbon abundance in Small Magellanic Cloud planetary nebulae through Advanced Camera for Surveys prism spectroscopy: constraining stellar evolution at low metallicity
L. Stanghellini, T. -H. Lee, R. A. Shaw +2
We perform near ultraviolet ACS prism spectroscopy of 11 Small Magellanic Cloud (SMC) planetary nebulae (PNe) with the main aim of deriving the abundance of carbon. The analysis of…
Increasing the Number of Underrepresented Minorities in Astronomy Through K-12 Education and Public Outreach (Paper II)
Dara Norman, CSMA, NSHP +30
In order to attract, recruit and retain underrepresented minority students to pursue Astronomy and related fields, we must ensure that there continues to be a well qualified pool o…
Increasing the Number of Underrepresented Minorities in Astronomy at the Undergraduate, Graduate, and Postdoctoral Levels (Paper I)
Dara Norman, CSMA, NSHP +30
If the ethnic makeup of the astronomy profession is to achieve parity with the general population within one generation (~30 years), the number of underrepresented minorities earni…
Increasing the Number of Underrepresented Minorities in Astronomy: Executive Summary
Dara Norman, CSMA, NSHP +30
Promoting racial and ethnic diversity is critically important to the future success and growth of the field of astronomy. The raw ability, drive and interest required to excel in t…
A peculiar HI cloud near the distant globular cluster Pal 4
Jacco Th. van Loon, Snezana Stanimirovic, Mary Putman +4
We present 21-cm observations of four Galactic globular clusters, as part of the on-going GALFA-HI Survey at Arecibo. We discovered a peculiar HI cloud in the vicinity of the dista…