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  • Phys 315 Assignments
    solar sytem and enter interstellar space Even though Pioneer 10 and 11 were launched before the Voyagers the trajectory of Voyager 1 puts it at a greater distance than the other spacecraft There are various ways one could decide whether the spacecraft has left the Solar system the one adopted here quite reasonably is that the spacecraft has left the heliosphere the region in which the particle density of the plasma is dominated by the Sun and entered the region in which the particle density is typical of what is expected in interstellar space Suppose instead that we ask whether the light reaching the spacecraft is dominated by the collective light from other stars rather than our Sun With this in mind do Prob 1 10 in the text and do the comparison with Voyager I only ASSIGNMENT 2 Assigned Wednesday Jan 22 Due Thursday Jan 30 1 The spectral power of the galaxy NGC 3044 in the radio band is L ν 6 x 10 21 Watts Hz careful not cgs units and this radio emission subtends an ellipse on the sky with major x minor axis dimensions of 4 9 x 0 7 arcmin The distance to NGC 3044 is 21 7 Mpc a Find the average specific intensity of the radio emission in cgs units b In 9 hours of observing time the rms noise level of a map obtained using the EVLA is 1 μJy per beam The linear angle subtended by the beam which is circular is θ b 15 arcsec At what signal to noise S N level will the average specific intensity from this galaxy be detected in 9 hours of observing If you would like to see what this galaxy looks like check the Nasa Extragalactic Database and type in NGC3079 in

    Original URL path: http://www.astro.queensu.ca/~irwin/phy315/assignments/y2014/assignments_2014.html (2016-02-13)
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  • Phys 315 Project
    Mexico to choose from for this year s project The Queen s Physics Department has set up a group account for Phy 315 students You will be emailed your username and password for access to these telescopes It is possible to make a reservation advised so that no one will pre empt your observations However I suggest that you also watch the observations as they proceed at least the first time to get a feel for what is being done Research This year s goal is to measure the light curve of a transiting extra solar planet using the method of differential photometry An example of a light curve and its relation to system geometry is shown immediately below Notice that the planet itself contributes negligibly to the total luminosity of the system and that is why there is no accompanying dip in the light curve when the planet goes behind the star actually the dip is present but not measurable by the available equipment see Fig 4 14 in the text for such an example Students working in pairs will obtain the light curve which should include the uneclipsed portion of the curve ingress egress and the uneclipsed light again i e roughly corresponding to the dip in the light curve under the second image from the left below The whole process takes between 1 and 2 hours typically Colin Lewis email clewis astro queensu ca is the TA for the course and will provide further information as needed See also the project instructions below This project was done last year and you are encouraged to look at the write up in the on line Cassiopeia magazine which summarizes the project and links to the results of last year I would like to improve on last year s project

    Original URL path: http://www.astro.queensu.ca/~irwin/phy315/project/y2014/project.html (2016-02-13)
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  • Phys 372 Assignments
    Mon Feb 2 Assignment 3 Solutions ASSIGNMENT 4 Assigned Mon Feb 2 Due Mon Feb 9 Assignment 4 Solutions ASSIGNMENT 5 Assigned Mon Feb 9 Due Mon Feb 23 Assignment 5 Solutions Midterm is Thursday Feb 12 2015 Reading week is Feb 16 20 2015 Note that the following assignment and due dates have been modified ASSIGNMENT 6 Assigned Thurs Feb 26 Due Thurs Mar 5 Assignment 6 Solutions ASSIGNMENT

    Original URL path: http://www.astro.queensu.ca/~irwin/phy372/assignments.html (2016-02-13)
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  • Phys 415 Outline 1999
    by Dr D Hanes for his part of the course INSTRUCTOR Judith Irwin Office 308E Stirling Hall Ph 533 2717 email irwin astro queensu ca OUTLINE There are two parts to this course The first assumes that we have a measurement of the brightness distribution I nu RA DEC on the sky The questions are then what type of radiation is being emitted by the source e g synchrotron Bremsstrahlung

    Original URL path: http://www.astro.queensu.ca/~irwin/phy415/outline.html (2016-02-13)
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  • Phys 415 Assignments
    Assignments 1999 Assignment 1 Due October 25 Assignment 2 Due November 1 Assignment 3 Due November 8 Assignment 4 Due November 17 Assignment 5 Due November 25 Home Pages Queen s Physics Queen s Astronomy Irwin Phy 415 Top of

    Original URL path: http://www.astro.queensu.ca/~irwin/phy415/assignments.html (2016-02-13)
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  • Phys 225 Important Dates
    from the box down the hall from my office Room 308E Stirling If you see other students from the class please inform them that the assignments are ready The final exam constitutes 50 of the grade with 25 from the radio astronomy part and 25 from the optical astronomy part The radio astronomy section will have a mixture of calculation and explanation Please bring calculators Constants and complicated equations will

    Original URL path: http://www.astro.queensu.ca/~irwin/phy415/exam.html (2016-02-13)
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  • Judith Irwin's Fall Schedule, 2005
    WINTER SCHEDULE 2007 Monday Tuesday Wednesday Thursday Friday 8 30 9 30 9 30 10 30 10 30 11 30 11 30 12 30 Phys 433 813 412B 12 30 1 30 Phys 433 813 412B 1 30 2 30

    Original URL path: http://www.astro.queensu.ca/~irwin/schedule_w2007.html (2016-02-13)
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  • Phys 811 Books and Resources
    harvard edu abstract service html is particularly useful The Canadian Astronomical Data Center CADC http cadcwww hia nrc ca and SkyView at http skyview gsfc nasa gov skyview html The National Radio Astronomy Observatory NRAO US including links to all NRAO telescopes and resources http www nrao edu The National Centre for Radio Astrophysics NCRA India including links to the Giant Metre wave Radio Telescope GMRT http www ncra tifr res in The Joint Astronomy Centre JAC UK including links to the James Clerk Maxwell Telescope JCMT http www jach hawaii edu List of all other non US radio telescopes and related observatories including ATCA IRAM DRAO Nobeyama SEST WSRT http www nationalacademies org bpa corf forgn97a html Software Packages for Processing Radio Data NRAO Software including the Astronomical Image Processing System AIPS http www nrao edu software JCMT spectral line software SPECX http www jach hawaii edu JACpublic JCMT software specx Multichannel Image Reconstruction Image Analysis and Display MIRIAD http www atnf csiro au computing software miriad Groningen Image Processing System GIPSY http www astro rug nl gipsy Karma http www ras ucalgary ca karma Radio Astronomy Surveys The Westerbork Northern Sky Survey WENSS http www strw leidenuniv nl

    Original URL path: http://www.astro.queensu.ca/~irwin/phy811/resources.html (2016-02-13)
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