Top Posters
Since Sunday
r
4
L
4
3
d
3
M
3
l
3
V
3
s
3
d
3
a
3
g
3
j
3
Home Q & A Board Science-Related Homework Help Physics
New Topic  
Tsync Tsync
wrote...
Go to Answer
Posts: 3450
Rep: 8 0
8 years ago
Which of the following is NOT an argument for Cygnus X-1's being a true black hole?
A) The mass of the visible B star is even greater than Cygnus X-1, at around 25 solar masses.
B) X-ray observations around the object support a temperature of several million K.
C) X-rays from Cygnus X-1 vary on time scales as short as a millisecond.
D) Cygnus X-1's mass is estimated to be about 10 solar masses.
E) Spectroscopic data suggests hot gas is flowing from the companion B star onto Cygnus X-1.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
Read 199 times
3 Replies
Minoring in physics
Replies
Answer verified by a subject expert
RatatouilleRatatouille
wrote...
#1
Top Poster
Posts: 3710
Rep: 56 0
8 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

Tsync Author
wrote...
#2
8 years ago
Wonderful, thanks for your time and effort
Minoring in physics
wrote...
#3
8 years ago
Happy to help Slight Smile
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1522 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 1518
  
 266
  
 503
Your Opinion
What percentage of nature vs. nurture dictates human intelligence?
Votes: 436
Previous poll results: Which industry do you think artificial intelligence (AI) will impact the most?