Question
In: Physics
1. The first set of data you receive is a spectrum of a main sequence star...
1. The first set of data you receive is a spectrum of a main sequence star taken with the MacDonald Spectrometer onboard HST. Based on the fact that the star’s spectrum has strong Hydrgen absorption lines and many molecular absorption lines, what spectral type do you believe this star to be? Explain.
2. Based on this star’s spectral type, explain the evolutionary stages that it will go through after it completes the main sequence phase of its life. How will this star’s life end?
3. HST is also equipped with the Williams Planetary Camera, which searches for planets around stars as their spectrum is being measured. Around this particular star, the camera detected three planets orbiting 1.1, 2.9, and 6.9 AU from the star. Their orbital periods are calculated to be 2.0, 3.3, and 5.1 years respectively. Are these measurements qualitatively consistent with the general trend predicted by Kepler’s Laws? Why or why not?
Solutions
genius_generous answered 2 years agoRelated Solutions
Our sun will first become a red giant star when it leaves the Main Sequence, as...
Our sun will first become a red giant star when it leaves the
Main Sequence, as it goes from core Hydrogen burning to shell
Hydrogen burning. After it has exhausted all of the fusion
reactions possible, perhaps some Helium fusion in there as well, it
will leave a corpse called a White Dwarf, where there is a
crystalline core of carbon and mixed ash products, surrounded
by
Estimate the Kelvin-Helmholtz lifetime in year of a 17 solar mass main sequence star. You will...
Estimate the Kelvin-Helmholtz lifetime in year of a 17 solar
mass main sequence star. You will need the mass-luminosity relation
and main sequence stellar class G0.
M / Mo = 1.1
R / Ro = 1.05
L / Lo = 1.3
What is the very first step in the sequence of processes by which a main sequence...
What is the very first step in the sequence of processes by
which a main sequence star like our Sun derives its energy output,
and about how long does it take for this first step to occur with
50% probability?
1. Weak decay of a proton to a neutron, positron and neutrino,
in about 5 ×109 years.
2. Fusion of two He4 nuclei to form C8, in about 1 year.
3. Fusion of deuterium and tritium, in about 2 seconds....
What is the very first step in the sequence of processes by which a main sequence...
What is the very first step in the sequence of processes by
which a main sequence star like our Sun derives its energy output,
and about how long does it take for this first step to occur with
50% probability?
1. Weak decay of a proton to a neutron, positron and neutrino,
in about 5 ×109 years.
3. Fusion of two He4 nuclei to form C8 ,
in about 1 year.
4. Fusion of a proton and neutron to form...
Explain (in your own words) the shape of the Hayashi track for a pre-main sequence star,...
Explain (in your own words) the shape of the Hayashi track for a
pre-main sequence star, noting the
most important physical changes that occur in a star as it moves
from being a collapsing cloud of
gas to being a hydrogen burning main sequence star. Explain how
this varies for low and high mass
stars. What is the best wavelength range to detect pre-main
sequence stars, explain why.
Please answer all sections as they are about the same
concept.
We observe a B-type main sequence star (MV = -1.1) in the direction of a large...
We observe a B-type main sequence star (MV = -1.1) in the
direction of a large region of interstellar gas and dust. The
visual extinction looking through the cloud is 1.1 magnitudes. The
thickness of the nebula is estimated to be 20 pc and its center is
located 700 pc from Earth.
a. If the star is in front of the nebula, what would be its
apparent visual magnitude?
b. If the star is behind the nebula, what would be...
(please type not write down the answer) astronomy 3. A main sequence star of mass 15...
(please type not write down the answer) astronomy
3. A main sequence star of mass 15 M⊙ has a luminosity of
approximately 10,000 L⊙ . a. At what rate does mass vanish as H is
fused to He in the star’s core? Note: When we say “mass vanish”
what we really mean is “gets converted into energy and leaves the
star as light”. b. At what rate is H converted into He? To do this
you need to take into...
A main sequence star has the spectral classification of B5. Estimate its luminosity from the HR...
A main sequence star has the spectral classification of B5.
Estimate its luminosity from the HR diagrams in your text. Explain
in words how you can find its distance. What is this method of
finding stellar distance called?
Consider the Fibonacci sequence 1,1,2,3,5,8,13,21,34,55,89,…. . The first two numbers are 1 and 1. When you...
Consider the Fibonacci sequence 1,1,2,3,5,8,13,21,34,55,89,…. .
The first two numbers are 1 and 1. When you add these numbers you
get 2 = 1+1, which becomes the third number in the sequence. When
you add the second and third numbers, you get 3 = 1+2, which
becomes the fourth number in the sequence. When you add the third
and fourth numbers, you get 5 = 2+3, which becomes the fifth number
in the sequence; and so on to generate the...
You first need to compute the demand function associated with the data set and use that...
You first need to compute the demand function associated with
the data set and use that demand function to compute the optimal
price for the product. You can use 20% of the average price as the
cost of the product.
please show excel work
P
D
1
301
2
106
3
58
4
38
5
27
6
20
7
18
8
14
9
13
10
10
11
10
12
7
13
6
14
8
15
7
16
6
17
4...
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