From Alcyone Atlas, Celaeno, Electra, Maia, Merope, Pleione, Sterope, Taygeta, 2

Question

From Alcyone Atlas, Celaeno, Electra, Maia, Merope, Pleione, Sterope, Taygeta, 22 Tauri,

1. which star is the brightest? which star is the faintest?

2. since the size of each star also tracks diagonally across the H-R diagram from the smallest objects in the lower left to the largest objects in the upper right, which star has the largest radius? which star hasthe smallest radius?

3.what can you say about the spread of distance among the stars in this cluster compared to the distance of this cluster from our solar system?

4.which, if any, stars are located off the main sequence? what does that say about the age of this cluster?

5.since all of these stars formed at about the same time and from the same collapsing nebula, why are they at different points on the H-R diagram?

6. which of these stars will move off the main sequence next? how do you know?

//d2vlcm61l7u1fs.cloudfront.net/media%2F355%2F355b5683-c31e-4d0b-900e-9ddf6342800d%2Fphp6kuh3W.png

index File Edit View Options Labels LiveSky Favourites Window Help Time and Date Time Flow Rate Mewing Location Gaze Zoom (Width x Height) 1:55 38 ®ò3OA 11 2016 AD Columbia, United States Alt. 75i Az: 199 Now Sunrise Sunset Spaceship N S E W Z 5.0h +20h This morning 1:55:38 -+ -20h 10h +5.0h +10h Graph tems + Location Hertzsprung-Russell 10 Pleiades Sun The Moon upergiant lan hite dwars Sterope ai- 10 G K -H-R Options Taygeta sMai Use absolute magnitudes Automatic ranges Pleione Image Brightness celaeno Celaern Distance cut-off 0.20 ly (minimum) 300.00 ly (maximum) .HIP17900 Labels Gridlines Main sequence Regions Dim labels 7:42 0 2016/11/11

Explanation / Answer

1. The stars in the decreasing order of brightness are :Alcyone, Atlas, Electra, Maia, Merope, Taygeta, Pleione, Celaeno, Sterope, 22 Tauri.

Alcyone is brightest and 22 Tauri is faintest.

2. Alcyone is the star with largest cluster in the cluster. Pleione is has the smallest radius in cluster.

3. This is Pleiades cluster and it is about 440 light years away. For comparison, this cluster is about 8 light years in radius.

4. If the lowest mass star is off the main sequence phase, the cluster is expected to be older.

5. HR diagram plots magnitude and temperature. Since the stars of the cluster have different magnitude and temperature, they are distributed in HR diagram.

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.