Astrofisika

"Dalam hati yang menyatu tempat manusia mendekatkan diri kepada Sang Pengatur Tatanan nan Maha Sempurna Alam Raya ini" 

 ~Arip~

Frontiers and Controversies in Astrophysics 

 

Lecture 6 - Microlensing, Astrometry and Other Methods

 

 

Overview:

 

The class begins with a discussion on transits – important astronomical events that help astronomers to find new planets. The event occurs when a celestial body moves across the face of the star it revolves around and blocks some of its light. By calculating the amount of light that is being obscured astronomers can obtain important information about both star and planet, such as size, density, radial velocity and more. The concept of planetary migration is explained in order to better understand the dramatic differences between bodies in the Inner and Outer Solar System. Finally, potential problems in the Solar System that may occur as a result of migration are addressed.

Problem sets/Reading assignment:

Problem Set 2 [PDF]
Problem Set 2 Solutions [PDF]
 

Course Media Transcript html Audio mp3 Low Bandwidth Video mov [100MB] High Bandwidth Video mov [500MB]

Resources:

Class Notes - Lecture 6 [PDF]

Sumber:

1. The University of Yale Open Course Ware

2. Professor Bailyn's guide to Extrasolar Planet Websites
http://www.astro.yale.edu/bailyn/astro160/planets.html

Ucapan Terima Kasih:

1. Bapak. Prof. Dr. Ing. H. B. J. Habibie.

2. Departemen Pendidikan Nasional

3. Kementrian Riset dan Teknologi

4. Lembaga Penerbangan dan Antariksa Nasional


Disusun Ulang Oleh:

Arip Nurahman

Department of Physics, Indonesia University of Education

&

Follower Open Course Ware at MIT-Harvard University, Cambridge.USA.

Semoga Bermanfaat dan Terima Kasih

Indonesian Space Force Command

Indonesian Space Force Command   

 Komando Untuk Keamanan Luar Angkasa 

Dari Angkatan Antariksa Indonesia

F-22 Raptor
F-22 Raptor
Role	Stealth Air superiority fighter, multirole fighter
National origin	United States
Manufacturer	Lockheed Martin Aeronautics Boeing Integrated Defense Systems
First flight	YF-22: 29 September 1990[1] F-22: 7 September 1997[1]
Introduced	15 December 2005
Status	In service[2]
Primary user	United States Air Force
Number built	151 as of December 2009,(187 planned)
Program cost	US$65 billion[3]
Unit cost	US$150 million(2009 flyaway cost)[4]
Developed into	X-44 MANTA FB-22

Specifications (F-22 Raptor)

 

Data from USAF,^[2] F-22 Raptor Team web site,^[182] Lockheed Martin,^[183] Aviation Week,^[94] and Journal of Electronic Defense^[96]

General characteristics

• Crew: 1
• Length: 62 ft 1 in (18.90 m)
• Wingspan: 44 ft 6 in (13.56 m)
• Height: 16 ft 8 in (5.08 m)
• Wing area: 840 ft² (78.04 m²)
• Airfoil: NACA 64A?05.92 root, NACA 64A?04.29 tip
• Empty weight: 43,430 lb (19,700 kg^[2][183])
• Loaded weight: 64,460 lb (29,300 kg^[184])
• Max takeoff weight: 83,500 lb (38,000 kg)
• Powerplant: 2× Pratt & Whitney F119-PW-100 Pitch Thrust vectoring turbofans
  
  • Dry thrust: 23,500 lb^[185] (104 kN) each
  • Thrust with afterburner: 35,000+ lb^[2][185] (156+ kN) each
• Fuel capacity: 18,000 lb (8,200 kg) internally,^[2][183] or 26,000 lb (11,900 kg) with two external fuel tanks^[2][183]

Performance

• Maximum speed:
  
  
  • At altitude: Mach 2.25 (1,500 mph, 2,410 km/h)^[87]
  • Supercruise: Mach 1.82 (1,220 mph, 1,963 km/h)^[87]
• Range: 1,600 nmi (1,840 mi, 2,960 km) with 2 external fuel tanks
• Combat radius: 410 nmi^[182] (471 mi, 759 km)
• Ferry range: 2,000 mi (1,738 nmi, 3,219 km)
• Service ceiling: 65,000 ft (19,812 m)
• Wing loading: 77 lb/ft² (375 kg/m²)
• Thrust/weight: 1.08 (1.26 with loaded weight & 50% fuel)
• Maximum g-load: -3.0/+9.0 g^[87]

USAF poster overview of key features and armament

Armament

• Guns: 1× 20 mm (0.787 in) M61A2 Vulcan gatling gun in starboard wing root, 480 rounds
• Air to air loadout:
  
  • 6× AIM-120 AMRAAM
  • 2× AIM-9 Sidewinder
• Air to ground loadout:
  
  • 2× AIM-120 AMRAAM and
  • 2× AIM-9 Sidewinder for self-protection, and one of the following:
    
    • 2× 1,000 lb (450 kg) JDAM or
    • 2× Wind Corrected Munitions Dispensers (WCMDs) or
    • 8× 250 lb (110 kg) GBU-39 Small Diameter Bombs
• Hardpoints: 4× under-wing pylon stations can be fitted to carry 600 US gallon drop tanks or weapons, each with a capacity of 5,000 lb (2,268 kg).^[186][187]

Avionics

• RWR (Radar warning receiver): 250 nmi (463 km) or more^[96]
• Radar: 125-150 miles (200-240 km) against 1 m² (11 sq ft) targets (estimated range)^[94]
• Chemring MJU-39/40 flares for protection against IR missiles.^[188]

Astrofisika

"Pemikiran dan Permasalahan yang menghampiri manusia akan menyebabkan kedewasaan dan kemajuan peradaban manusia itu sendiri' 

  ~Arip~ 

Frontiers and Controversies in Astrophysics 

 

 

Lecture 5 - Planetary Transits

 

 

 

Overview:

Professor Bailyn talks about student responses for a paper assignment on the controversy over Pluto. The central question is whether the popular debate is indeed a "scientific controversy." A number of scientific "fables" are discussed and a moral is associated with each: the demotion of Pluto (moral: science can be affected by culture); the discovery of 51 Peg b (morals: expect the unexpected, and look at your data); the disproof of pulsation as explanation for the Velocity Curves (moral: sometimes science works like science).

Problem sets/Reading assignment:

None assigned

Course Media

Transcript

html

Audio

mp3

Low Bandwidth Video

mov [100MB]

High Bandwidth Video

mov [500MB]

Resources:

Class Notes - Lecture 5 [PDF]

Sumber:

1. The University of Yale Open Course Ware

2. Professor Bailyn's guide to Extrasolar Planet Websites
http://www.astro.yale.edu/bailyn/astro160/planets.html

Ucapan Terima Kasih:

1. Bapak. Prof. Dr. Ing. H. B. J. Habibie.

2. Departemen Pendidikan Nasional

3. Kementrian Riset dan Teknologi

4. Lembaga Penerbangan dan Antariksa Nasional
 


Disusun Ulang Oleh:

Arip Nurahman

Department of Physics, Indonesia University of Education

&

Follower Open Course Ware at MIT-Harvard University, Cambridge. USA.

Semoga Bermanfaat dan Terima Kasih