What is this PH 1600 Introductory Astronomy Lecture

What is this? PH 1600: Introductory Astronomy Lecture 14: Stars: Single and Binary

PH 1600: Introductory Astronomy Lecture 14: Star: Single and Binary Next Lecture: Star Clusters School: Michigan Technological University Professor: Robert Nemiroff Online Course Web. CT pages: http: //courses. mtu. edu/ This class can be taken online ONLY, class attendance is not required!

You are responsible for… ¡ ¡ ¡ Lecture material Listed wikipedia entries l But not higher math APODs posted during the semester l ¡ APOD review every week during lecture Completing the Quizzes l l l Homework quizzes 1 - 6, Midterm already due Homework 7 due later (Monday) by 5 pm See Web. CT at http: //courses. mtu. edu/

Wikipedia entries: ¡ ¡ ¡ Stars Annie Jump Cannon Stellar Classification Binary star Inverse-square law 4

Henrietta Leavitt Calibrates the Stars Credit: AAVSO APOD: 2000 September 3 Stars: Distant Suns

Annie Jump Cannon http: //en. wikipedia. org/wiki/Annie_Jump_Cannon 6

Stellar Spectral Types: OBAFGKM Credit & Copyright: KPNO 0. 9 -m Telescope, AURA, NOAO, NSF APOD: 2004 April 18

http: //en. wikipedia. org/wiki/Image: Hertzsprung-Russell_diagram_Richard_Powell. png

http: //abyss. uoregon. edu/~js/ast 122/lectures/lec 11. html

http: //abyss. uoregon. edu/~js/ast 122/lectures/lec 11. html

http: //en. wikipedia. org/wiki/OBAFGKM

Star sizes video on youtube: ¡ http: //www. youtube. com/watch? v=p. Zt-a. UU 0 c. LI 12

http: //abyss. uoregon. edu/~js/ast 122/lectures/lec 11. html

Orion Star Colors Credit and Copyright: David Malin APOD: 1998 August 29

Famous Stars ¡ ¡ Sun Polaris l ¡ ¡ ¡ Sirius Betelgeuse Alpha Centauri l ¡ North star Proxima Centauri Nemiroff’s Star l Just kidding

Polaris: The North Star Credit & Copyright: Wally Pacholka APOD: 1999 October 6

Watch the Sky Rotate : Diurnal Motion ¡ http: //antwrp. gsfc. nasa. gov/apod/ap 010110. html

Star Trails Above Mauna Kea Credit & Copyright: Peter Michaud (Gemini Observatory), AURA, NSF APOD: 2005 December 20

11 Hour Star Trails Credit & Copyright: Josch Hambsch APOD: 2006 September 15

Warped Sky: Star Trails Panorama Credit & Copyright: Peter Ward APOD: 2007 June 13

Sirius: The Brightest Star in the Night Credit & Copyright: Juan Carlos Casado APOD: 2000 June 11

X-Rays From Sirius B Credit: NASA/ CXC/ SAO APOD: 2000 October 6

Resolving Mira Credit: M. Karovska (Harvard-Smithsonian Cf. A) et al. , FOC, ESA, NASA APOD: 2001 January 21

A Giant Starspot on HD 12545 Credit & Copyright: K. Strassmeier (U. Wien), Coude Feed Telescope, AURA, NOAO, NSF APOD: 2003 November 2

Betelgeuse, Betelgeuse Credit: A. Dupree (Cf. A), R. Gilliland (STSc. I), NASA APOD: 1999 June 5

Simulated Supergiant Star Credit: B. Freytag, (U. Uppsala) APOD: 2000 December 22

Why Stars Twinkle Credit: Applied Optics Group (Imperial College), Herschel 4. 2 -m Telescope APOD: 2000 July 25

Inverse Square Law of Brightness http: //en. wikipedia. org/wiki/Image: Inverse. Square. Law. png

http: //en. wikipedia. org/wiki/Inverse-square_law 29

Example ¡ ¡ ¡ Stars A and B are identical. Star B is at twice the distance of star A. How much brighter does star A appear than star B? Use inverse square law: l. A =k/r. A 2 Also, l. B=k/r. B 2. Therefore l. A/l. B=(r. B/r. A)2 = 22 = 4.

Proxima Centauri: The Closest Star Credit & Copyright: David Malin, UK Schmidt Telescope, DSS, AAO APOD: 2002 July 15

Alpha Centauri: The Closest Star System Credit: 1 -Meter Schmidt Telescope, ESO APOD: 2003 March 23

Binary Stars ¡ Visual Binaries l ¡ Spectroscopic binaries l ¡ Doppler color changes Eclipsing Binaries l ¡ Can see two or more Dark times Astrometric Binaries l Single star wobble

Albireo: A Bright and Beautiful Double Credit & Copyright: Richard Yandrick (Cosmicimage. com) APOD: 2005 August 30

http: //en. wikipedia. org/wiki/Image: Orbit 5. gif

The Big Dipper Cluster Credit & Copyright: Noel Carboni APOD: 2006 March 17

Mizar Binary Star Credit: J. Benson et al. , NPOI Group, USNO, NRL APOD: 1997 February 19

http: //csep 10. phys. utk. edu/astr 162/lect/binaries/spectroscopic. html

http: //en. wikipedia. org/wiki/Eclipsing_binary

Mira: The Wonderful Star Illustration Credit: M. Weiss(CXC) APOD: 2005 May 5

Resolving Mira Credit: M. Karovska (Harvard-Smithsonian Cf. A) et al. , FOC, ESA, NASA APOD: 2001 January 21

Mira Over Germany Credit & Copyright: Stefan Seip (Astro. Meeting. de) APOD: 2007 42 February 21

NGC 3132: The Eight Burst Nebula Credit: Hubble Heritage Team (AURA/STSc. I /NASA) APOD: 2003 September 13

The Case of the Very Dusty Binary Star Illustration Credit & Copyright: Lynette Cook APOD: 2008 September 25 44

An Intermediate Polar Binary System Illustration Credit & Copyright: Mark Garlick (Space-art) APOD: 2003 November 10