Astronomy 10 Quiz 10, Spring Semester 2008
Cuesta College, San Luis Obispo, CA
Astronomy 10 learning goal Q10.3
[3.0 points.] Which one of the following choices best explains why an isolated neutron star cannot have repeated x-ray bursts?
(A) There is no companion star to heat up.
(B) There is no companion star to distort spacetime.
(C) It expended all of its extra energy during its type II supernova.
(D) There is no external source of hydrogen.
(E) There is not enough degeneracy pressure.
Correct answer: (D)
If there is no companion star to transfer hydrogen to a neutron star, then the neutron star cannot collect and compact this material onto its surface, making it undergo fusion to produce an x-ray burst.
Student responses
Section 4160
(A) : 7 students
(B) : 1 student
(C) : 10 students
(D) : 16 students
(E) : 0 students
Previous post:
Astronomy in-class activity: compact objects with companion stars.
Showing posts with label x-ray burst. Show all posts
Showing posts with label x-ray burst. Show all posts
20080507
Astronomy in-class activity: compact objects with companion stars
Astronomy 210 In-class activity 23 v.07.04.28, spring semester 2008
Cuesta College, San Luis Obispo, CA
Students find their assigned groups of three to four students, and work cooperatively on an in-class activity worksheet to compare and contrast the different features of compact objects with companion stars. Students are instructed to look for connections and similarities, then to concentrate on specific differences.
Cuesta College, San Luis Obispo, CA
Students find their assigned groups of three to four students, and work cooperatively on an in-class activity worksheet to compare and contrast the different features of compact objects with companion stars. Students are instructed to look for connections and similarities, then to concentrate on specific differences.
20071130
Astronomy quiz question: x-ray bursts
Astronomy 10 Quiz 10, Fall Semester 2007
Cuesta College, San Luis Obispo, CA
Astronomy 10 learning goal Q10.3
[3.0 points.] Which one of the following choices best describes a close pair (mass-exchanging) binary system that can have repeatable x-ray bursts?
(A) Two neutron stars.
(B) A massive main sequence star and a red dwarf.
(C) A black hole and a neutron star.
(D) A supergiant and a neutron star.
(E) A supergiant and a black hole.
Correct answer: (D)
The hydrogen shed from a supergiant will form a degenerate layer around a neutron star companion, and this outer layer will undergo fusion, producing an x-ray burst.
Student responses
Section 0135
(A) : 5 students
(B) : 3 students
(C) : 10 students
(D) : 9 students
(E) : 5 students
Student responses
Section 1073
(A) : 7 students
(B) : 3 student
(C) : 6 students
(D) : 22 students
(E) : 5 students
Previous post: Astronomy quiz question: novae and type Ia supernovae
Cuesta College, San Luis Obispo, CA
Astronomy 10 learning goal Q10.3
[3.0 points.] Which one of the following choices best describes a close pair (mass-exchanging) binary system that can have repeatable x-ray bursts?
(A) Two neutron stars.
(B) A massive main sequence star and a red dwarf.
(C) A black hole and a neutron star.
(D) A supergiant and a neutron star.
(E) A supergiant and a black hole.
Correct answer: (D)
The hydrogen shed from a supergiant will form a degenerate layer around a neutron star companion, and this outer layer will undergo fusion, producing an x-ray burst.
Student responses
Section 0135
(A) : 5 students
(B) : 3 students
(C) : 10 students
(D) : 9 students
(E) : 5 students
Student responses
Section 1073
(A) : 7 students
(B) : 3 student
(C) : 6 students
(D) : 22 students
(E) : 5 students
Previous post: Astronomy quiz question: novae and type Ia supernovae
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