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From: "fam. Hartog" <jch@filternet.nl>
Subject: black holes
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From: "fam. Hartog" <jch@filternet.nl>
To: <xmmhelp@xmm.vilspa.esa.es>
Subject: black holes
Date: Tue, 16 Dec 2003 15:30:15 +0100
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Hello,
I'm doing a research-task for school, about the effect of a black hole on a
group of stars. Can you tell me if the XMM-Newton has found results about
this subject and where I can find that information? I've simulated it with a
computer-program and now I'm looking for real results of satelites.
I live in Holland, so excuse me for my bad English.
Thank you!

Best regards,
Maaike

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<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D640532414-16122003>Hello,</SPAN></FONT></DIV>
<DIV><FONT size=3D2><FONT face=3DArial>I<SPAN=20
class=3D640532414-16122003>'m&nbsp;</SPAN><SPAN=20
class=3D640532414-16122003>doing</SPAN> a research-task for school,=20
about&nbsp;<SPAN class=3D640532414-16122003>the effect
o</SPAN><SPAN=20
class=3D640532414-16122003>f a </SPAN>black hole<SPAN =
class=3D640532414-16122003> on=20
a group of stars.</SPAN>&nbsp;<SPAN
class=3D640532414-16122003>Can you =
tell me if=20
the XMM-Newton has found results about this subject and where I can find =
that=20
information? I've simulated it with a computer-program and now I'm =
looking for=20
real results of satelites.</SPAN></FONT></FONT></DIV>
<DIV><FONT size=3D2><FONT face=3DArial><SPAN =
class=3D640532414-16122003>I live in=20
Holland, so excuse me for my bad
English.</SPAN></FONT></FONT></DIV>
<DIV><FONT size=3D2><FONT face=3DArial><SPAN =
class=3D640532414-16122003>Thank=20
you!</SPAN></FONT></FONT></DIV>
<DIV><FONT size=3D2><FONT face=3DArial><SPAN=20
class=3D640532414-16122003></SPAN></FONT></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2><FONT face=3DArial><SPAN =
class=3D640532414-16122003>Best=20
regards,</SPAN></FONT></FONT></DIV>
<DIV><FONT size=3D2><FONT face=3DArial><SPAN=20
class=3D640532414-16122003>Maaike</SPAN></FONT></FONT></DIV></BODY></HTML=
>

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Reply 1

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From: Norbert Schartel <xmmhelp@xmm.vilspa.esa.es>
To: jch@filternet.nl
Subject: Re: black holes (PR#9721)
Date: Wed Dec 17 07:02:59 2003
Dear Maaike,

please, do not worry about your English,- the
main point in physics is that the results are
correct.

XMM-Newton has made several observations of 
black holes and there are several press-releases
available, see at:
http://xmm.vilspa.esa.es/external/xmm_news/latest_news.shtml
for example:
28-Mar-2003
26-Apr-2002
22-Oct-2001

If you want to go deeper then you can have a look to
the scientific publications, which are listed at:
http://heasarc.gsfc.nasa.gov/docs/xmm/xmmhp_bibliography.html
Black holes you can find under the category:
XRBs and AGN.

Most of the press releases referee to relativistic broaden
iron lines. I am not aware of a published paper which deals
with measurements of the "effect of a black hole on a group 
of stars". 

But, I am aware of a publication in preparation which observed 
something which may very interesting for you. I assume
that the publication comes out within the next weeks and
that we will make a press release of it. Please, check the 
top of our main page on which it will be announced:
http://xmm.vilspa.esa.es/
(Latest News)

With best regards
Norbert


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