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From: nathansecrest@msn.com
Subject: Possible Press Release
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Date: Wed, 12 Nov 2014 15:09:42 GMT
From: nathansecrest@msn.com
To: xmmhelp@sciops.esa.int
CC: nathansecrest@msn.com
Subject: Possible Press Release
Full_Name: Nathan Secrest
Submission from: (NULL) (199.211.133.254)


Hello,

I am writing to inform you that our paper, "An Optically Obscured AGN in a Low
Mass, Irregular Dwarf Galaxy: A Multi-Wavelength Analysis of J1329+3234", has
just been accepted for publication in The Astrophysical Journal.  For your
consideration, I post the abstract below:

"Supermassive black holes are found ubiquitously in large, bulge-dominated
galaxies throughout the local Universe, yet little is known about their presence
and properties in bulgeless and low mass galaxies. This is a significant
deficiency, since the mass distribution and occupation fraction of non-stellar
black holes provide important observational constraints on supermassive black
hole seed formation theories and many dwarf galaxies have not undergone major
mergers that would erase information on their original black hole population.
Using data from the Wide-field Infrared Survey Explorer, we discovered hundreds
of bulgeless and dwarf galaxies that display mid-infrared signatures of
extremely hot dust highly suggestive of powerful accreting massive black holes,
despite having no signatures of black hole activity at optical wavelengths. Here
we report, in our first follow-up X-ray investigation of this population, that
the irregular dwarf galaxy J132932.41+323417.0 (z = 0.0156) contains a hard,
unresolved X-ray source detected by XMM-Newton with luminosity L_2-10 keV = 2.4
. 10^40 erg/s, over two orders of magnitude greater than that expected from star
formation, strongly suggestive of the presence of an accreting massive black
hole. While enhanced X-ray emission and hot dust can be produced in extremely
low metallicity environments, J132932.41+323417.0 is not extremely metal poor (~
40% solar). With a stellar mass of 2.0 . 10^8 M_Sol, this galaxy is similar in
mass to the Small Magellanic Cloud, and is one of the lowest mass galaxies with
evidence for a massive nuclear black hole currently known."

As XMM-Newton was crucial for this work and as this work is significant in the
study of AGNs in dwarf galaxies, we have not submitted it to Astro-ph yet if you
are interested in doing a press release. I would be happy to email you a copy of
the accepted paper for your consideration.

Thank you,

Nathan Secrest
George Mason University


Reply 1

Resend
From: Nora Loiseau <xmmhelp@sciops.esa.int>
To: nathansecrest@msn.com
Subject: Re: Possible Press Release (PR#75173)
Date: Wed Nov 12 19:40:10 2014
Dear Dr. Secrest,

thank you very much for this information. We forwarded your mail to 
Norbert Schartel, the XMM-Newton Project Scientist, who will take care
of communicating your results to the press department.

Best regards,

Nora

> Full_Name: Nathan Secrest
> Submission from: (NULL) (199.211.133.254)
> 
> 
> Hello,
> 
> I am writing to inform you that our paper, "An Optically Obscured AGN in a
Low
> Mass, Irregular Dwarf Galaxy: A Multi-Wavelength Analysis of J1329+3234",
has
> just been accepted for publication in The Astrophysical Journal.  For your
> consideration, I post the abstract below:
> 
> "Supermassive black holes are found ubiquitously in large, bulge-dominated
> galaxies throughout the local Universe, yet little is known about their
presence
> and properties in bulgeless and low mass galaxies. This is a significant
> deficiency, since the mass distribution and occupation fraction of
non-stellar
> black holes provide important observational constraints on supermassive
black
> hole seed formation theories and many dwarf galaxies have not undergone
major
> mergers that would erase information on their original black hole
population.
> Using data from the Wide-field Infrared Survey Explorer, we discovered
hundreds
> of bulgeless and dwarf galaxies that display mid-infrared signatures of
> extremely hot dust highly suggestive of powerful accreting massive black
holes,
> despite having no signatures of black hole activity at optical wavelengths.
Here
> we report, in our first follow-up X-ray investigation of this population,
that
> the irregular dwarf galaxy J132932.41+323417.0 (z = 0.0156) contains a
hard,
> unresolved X-ray source detected by XMM-Newton with luminosity L_2-10 keV =
2.4
> . 10^40 erg/s, over two orders of magnitude greater than that expected from
star
> formation, strongly suggestive of the presence of an accreting massive
black
> hole. While enhanced X-ray emission and hot dust can be produced in
extremely
> low metallicity environments, J132932.41+323417.0 is not extremely metal
poor
(~
> 40% solar). With a stellar mass of 2.0 . 10^8 M_Sol, this galaxy is similar
in
> mass to the Small Magellanic Cloud, and is one of the lowest mass galaxies
with
> evidence for a massive nuclear black hole currently known."
> 
> As XMM-Newton was crucial for this work and as this work is significant in
the
> study of AGNs in dwarf galaxies, we have not submitted it to Astro-ph yet
if
you
> are interested in doing a press release. I would be happy to email you a
copy
of
> the accepted paper for your consideration.
> 
> Thank you,
> 
> Nathan Secrest
> George Mason University
> 
> ----
Dr. Nora Loiseau
XMM-Newton User Support Group

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