[seminar] Astro Journal Club on Thursday

[MladeN]

Dear all,

Our astronomy journal club is being held next Thursday (February 27th) at  
12:00 pm in the seminar room F-201 of the Physics Department. Meetings are  
held in English and are informal and open to everyone.

Please contact Oskari Miettinen or Mladen Novak if you want to present a  
paper or simply wish to discuss some discovery, idea or plot.


Below is information about this week's journal club.


Presenter: Mladen Novak.
Title: Observations of CID-42, a candidate recoiling supermassive black  
hole
Authors: Civano et al.

Abstract:
CID-42 shows two optical compact sources resolved in the HST/ACS image  
embedded in the same galaxy structure and a velocity offset of ∼1300 km  
s−1 between the H-beta broad and narrow emission line, as presented by  
Civano et al. Two scenarios have been proposed to explain the properties  
of CID-42: a gravitational wave (GW) recoiling SMBH and a double Type  
1/Type 2 active galactic nucleus (AGN) system, where one of the two is  
recoiling because of slingshot effect. In both scenarios, one of the  
optical nuclei hosts an unobscured AGN, while the other one, either an  
obscured AGN or a star-forming compact region.
Using X-ray Chandra data authors found that only one of the optical nuclei  
is responsible for the whole X-ray unobscured emission observed. The new  
wideband 10cm data from JVLA-COSMOS (PI V. Smolcic) suggests that all of  
the radio emission is also coming from the same source as X-ray but shows  
some puzzling spectral behavior.

Links to the published papers by Civano et al:
http://adsabs.harvard.edu/abs/2010ApJ...717..209C
http://adsabs.harvard.edu/abs/2012ApJ...752...49C


With regards,
Mladen Novak