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Observations Of Lph 123 And 127, High-Mass X-Ray Binaries, In A Two-Summer Attempt To Detect Variabilities

Student Name: Bonham, McKay
Advisor Name: Hintz, Eric
Approval Date: 8/1/2008
Report Type: Senior Thesis
Title: Observations Of Lph 123 And 127, High-Mass X-Ray Binaries, In A Two-Summer Attempt To Detect Variabilities
Abstract: Star J2030.5+4751, also known as star 123 of the LPH catalogue, and star 2202+501, also known in the LPH catalogue as 127, are high-mass X-ray binaries. Late B-type stars that are part of high-mass X-ray binary systems are likely to be variable stars with a long period. We are studying these systems with the intent of identifying them as variable stars and discovering their period. Our studies have been in the form of differential photometry, which attempts to spot variations in these stars’ magnitude by comparing them with stable stars in their frames. We have seen interesting variations in these stars, but not repeating variations that could be used to determine a period. We conclude that more data, gathered on a much more regular schedule, will be required to reach conclusive results about the variability of these targets. We also report a dramatic shift in the magnitude of one of LPH 123’s neighbors, and present it as a candidate for further variable star research.
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