Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
Articles 1 - 3 of 3
Full-Text Articles in Astrophysics and Astronomy
The Total Solar Eclipse Of 1869 In Iowa: What Remains Today, Jacob P. Baskin
The Total Solar Eclipse Of 1869 In Iowa: What Remains Today, Jacob P. Baskin
Summer Undergraduate Research Program (SURP) Symposium
On August 7th, 1869, a total solar eclipse was visible in the United States. It carved a path through the heartland, nearly bisecting the state of Iowa as it ran from the northwest corner of the state, through Des Moines, and down through the southeast. As the scientists of the day flocked from universities and observatories on the east coast to the Midwest for a chance to make observations and measurements, many of the teams chose to set up in Iowa. Along the path of the eclipse, the parties built temporary observatories to house their telescopes, or simply picked buildings …
The Solar Eclipse Of 1869 As Seen In Illinois, Indiana, And Kentucky, Trishyan Anthony
The Solar Eclipse Of 1869 As Seen In Illinois, Indiana, And Kentucky, Trishyan Anthony
Research in the Capitol
The Solar Eclipse of August 7th, 1869, was the first recorded total eclipse of the Sun to pass over the United States. The altitude of the eclipse varied depending on the longitude of the viewer. Wanting to know what was the public reaction of this solar eclipse gathering newspaper articles of the time really showed a window to what they were seeing and feeling at that time, and leading up to the day. Following the eclipse through some of the Midwest down to Kentucky showed differing results, as it had got later in the day of viewing. Though there was …
Investigating Fourier Coefficient Relationships Of Cepheid Variable Stars, Forrest Cronin, Siobahn Morgan
Investigating Fourier Coefficient Relationships Of Cepheid Variable Stars, Forrest Cronin, Siobahn Morgan
Summer Undergraduate Research Program (SURP) Symposium
Cepheid stars are valuable due to their usefulness in determining distances within our galaxy, and to other galaxies. Cepheid stars’ light variation can be parameterized using a Fourier series with coefficients Ai and ��i . Fourier coefficients have been shown to have trends linked to physical characteristics of Cepheids and RR Lyrae stars, such as luminosity, radius, pulsation modes and metallicity. Using data from the OGLE III and IV surveys, we determined relationships between Fourier coefficients in different photometric system and observed the influence of metallicity on the Cepheids in the Small Magellanic Cloud and the Large Magellanic Cloud. The …