Author Topic: Hubble and Voorwerpjes!  (Read 25575 times)

elizabeth

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Re: Hubble and Voorwerpjes!
« Reply #120 on: October 28, 2012, 09:54:49 am »
 ;D Awesome just in time for Halloween  8) 8) 8)

zutopian

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Re: Hubble and Voorwerpjes!
« Reply #121 on: November 25, 2012, 01:18:36 pm »
Forgot to add - at the risk of being coy, there is another Zoo paper about to be submitted that bears on this issue of how often we see binary AGN.

That reminds me of the following quote from the Voorwerpje paper:
Quote
While not the main thrust of our survey, it is worth noting that we find a few instances of either double AGN in interacting systems,
or AGN in the fainter member of a close pair (Mkn 177, Was 49, possibly SDSS J111100.60-005334.9 and SDSS J142522.28+141126.5).
These may be worth deeper spectroscopy in the context of mapping AGN obscuration;


587733081347063839              587741532253519916                588848898833580220              587742609727684701

1st image : In the Sought-AGN list
2nd image: In the HST Proposal "Sought AGN"
3rd image: ?
4th image: It had been listed in the 1st version of the Sought-AGN list, but then it was canceled. Recently, I posted that image in the "Collisional Rings" Topic. I think, that it is an interesting merger, not just concerning AGN.

zutopian

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Re: Hubble and Voorwerpjes!
« Reply #122 on: February 03, 2013, 07:32:36 am »
GZ blog post from 09 Jan 2013.:
"UGC 7342 and the Hubble Voorwerpje roundup – can they get any weirder?":
http://blog.galaxyzoo.org/2013/01/09/ugc-7342-and-the-hubble-voorwerpje-roundup-can-they-get-any-weirder/

There is the poster of the HST images available, which was presented at the 221st AAS meeting.

zutopian

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Re: Hubble and Voorwerpjes!
« Reply #123 on: October 22, 2013, 12:33:16 pm »
I found the Hubble image of the confirmed Voorwerpje galaxy Mrk 273:
Quote
Markarian 273 is a galaxy with a bizarre structure that somewhat resembles a toothbrush.
  :) :D ;D
http://hubblesite.org/newscenter/archive/releases/2008/16/image/bn/

EDIT: So the Voorwerpje is the tooth paste? ;D

Warning: this topic has not been posted in for at least 120 days.

Here is a recent paper about Mrk 273 aka "Tooth brush" galaxy (inofficial name). :

The Inner Kiloparsec of Mrk 273 with Keck Adaptive Optics
Vivian U (1,9), Anne Medling (2), David Sanders (1), Claire Max (2), Lee Armus (3), Kazushi Iwasawa (4), Aaron Evans (5, 6), Lisa Kewley (1, 7), Giovanni Fazio (8 )
Quote
This lends support to a scenario in which Mrk 273 may be a dual AGN system.
http://arxiv.org/abs/1307.8440


zutopian

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Re: Hubble and Voorwerpjes!
« Reply #124 on: October 22, 2013, 12:54:08 pm »
Referring to my previous post, which I did today.:

In conclusion: Many voorwerpje mergers are Dual AGN/ Dual AGN candidates. I mentioned Dual AGN in this topic several times!
« Last Edit: October 22, 2013, 01:48:22 pm by zutopian »

zutopian

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Re: Hubble and Voorwerpjes!
« Reply #125 on: October 22, 2013, 01:47:20 pm »
Referring to my previous post, which I did today.:

In conclusion: Many voorwerpje mergers are Dual AGN/ Dual AGN candidates. I mentioned Dual AGN in this topic several times!

The Dual AGNs with voorwerpje are following ones.:

- Mrk 273 "Tooth Brush"              : Dual AGN candidate according to Vivian U et al
- Mrk 266 A/B aka NGC 5256 A/B: Dual AGN according to J. M. Mazzarella et al. , one of the co-authors is Vivian U
- Mrk 739 aka NGC 3758              : Dual AGN: according to a paper by Koss et al.: One of the co-authors is K. Schawinski
- MRK 463                                     : Dual AGN according to Bianchi et al.
- UGC 11185                                : Dual AGN (candidate) according to Koss et al.

I guess, that Mrk 273, 266, 739 and 463 are late-stage mergers. UGC 11185 is an ongoing merger.
« Last Edit: October 22, 2013, 02:27:03 pm by zutopian »

zutopian

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Re: Hubble and Voorwerpjes!
« Reply #126 on: January 11, 2014, 05:35:29 pm »
Forgot to add - at the risk of being coy, there is another Zoo paper about to be submitted that bears on this issue of how often we see binary AGN.

That reminds me of the following quote from the Voorwerpje paper:
Quote
While not the main thrust of our survey, it is worth noting that we find a few instances of either double AGN in interacting systems,
or AGN in the fainter member of a close pair (Mkn 177, Was 49, possibly SDSS J111100.60-005334.9 and SDSS J142522.28+141126.5).
These may be worth deeper spectroscopy in the context of mapping AGN obscuration;


587733081347063839              587741532253519916                588848898833580220              587742609727684701

1st image : In the Sought-AGN list
2nd image: In the HST Proposal "Sought AGN"
3rd image: ?
4th image: It had been listed in the 1st version of the Sought-AGN list, but then it was canceled. Recently, I posted that image in the "Collisional Rings" Topic. I think, that it is an interesting merger, not just concerning AGN.

UPDATE:

3rd image: One of the GZ Quench galaxies.
4th image: In DR10 there is a spectrum for the galaxy in the center available.:
http://skyserver.sdss3.org/dr10/en/tools/explore/summary.aspx?id=1237668330952589372                                                       
(A further spectrum of it is available in NED.)
The other galaxy has also a spectrum, but it is also available in previous SDSS versions.
« Last Edit: January 11, 2014, 06:32:20 pm by zutopian »

zutopian

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Re: Hubble and Voorwerpjes!
« Reply #127 on: January 28, 2014, 07:16:24 pm »
Forgot to add - at the risk of being coy, there is another Zoo paper about to be submitted that bears on this issue of how often we see binary AGN.

That reminds me of the following quote from the Voorwerpje paper:
Quote
While not the main thrust of our survey, it is worth noting that we find a few instances of either double AGN in interacting systems,
or AGN in the fainter member of a close pair (Mkn 177, Was 49, possibly SDSS J111100.60-005334.9 and SDSS J142522.28+141126.5).
These may be worth deeper spectroscopy in the context of mapping AGN obscuration;


587733081347063839              587741532253519916                588848898833580220              587742609727684701

1st image : In the Sought-AGN list
2nd image: In the HST Proposal "Sought AGN"
3rd image: ?
4th image: It had been listed in the 1st version of the Sought-AGN list, but then it was canceled. Recently, I posted that image in the "Collisional Rings" Topic. I think, that it is an interesting merger, not just concerning AGN.

UPDATE:

3rd image: One of the GZ Quench galaxies.
4th image: In DR10 there is a spectrum for the galaxy in the center available.:
http://skyserver.sdss3.org/dr10/en/tools/explore/summary.aspx?id=1237668330952589372                                                       
(A further spectrum of it is available in NED.)
The other galaxy has also a spectrum, but it is also available in previous SDSS versions.

UPDATE:

1st image: New paper: One of the co-authors is Kevin Schawinski.:
SDSS1133: An Unusually Persistent Transient in a Nearby Dwarf Galaxy
Michael Koss, Laura Blecha, Richard Mushotzky, Chao Ling Hung, Sylvain Veilleux, Benny Trakhtenbrot, Kevin Schawinski, Daniel Stern, Nathan Smith, Yanxia Li, Allison Man, Alexei V. Filippenko, Jon C. Mauerhan, Kris Stanek, David Sanders
(Submitted on 27 Jan 2014) 
http://arxiv.org/abs/1401.6798

zutopian

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Re: Hubble and Voorwerpjes!
« Reply #128 on: June 19, 2014, 03:40:38 pm »
May be you could already confirm the tentative conclusion of this 1995 paper:
Quote
The analysis of the images of NGC 5972 shows that it is an E galaxy rather than an SO-a; this galaxy however shows some structures which are not identifiable with spiral arms but could perhaps be the result of a merger event.


Would NGC 5972 be a polar ring candidate?
 ::)  ::)

I think we entirely support the idea that NGC 5972 has undergone a merger - we see tidal streams, and the dust and gas are in multiple planes and twisted. It might end up as a polar ring, if we are really patient.

Warning: this topic has not been posted in for at least 120 days.

NGC 5972 has shown up in Radio Zoo Talk.:
http://radiotalk.galaxyzoo.org/#/subjects/ARG0002jh9
Talk discussion:NGC 5972: Galaxy with known voorwerpje and known doublelobe
http://radiotalk.galaxyzoo.org/#/boards/BRG0000002/discussions/DRG00006oe

I did following post in Radio Zoo Talk.:


http://skyserver.sdss3.org/public/en/tools/explore/summary.aspx?id=1237665566615666691

It is NGC 5972, which has a known voorwerpje (ionized gas cloud). Ref.: GZ paper by Keel et al.. 
One of the other NED Refs is as follows.:.

Title:  The Hubble type of the double lobe radio galaxy NGC 5972
Quote
We found in the literature a single example of a spiral galaxy associated with a classical extended double lobe radio source: NGC 5972 classified as an S0-a by Lauberts (1982). We show that it is rather an E galaxy which may possibly be the result of a merger event. It has an emission line spectrum typical of a Seyfert 2 galaxy.
Authors: Veron, P.; Veron-Cetty, M.-P.   
Publication: Astronomy and Astrophysics, v.296, p.315 (A&A Homepage)   
Publication Date: 04/1995   
Origin: CDS; KNUDSEN   
Bibliographic Code: 1995A&A...296..315V   
http://adsabs.harvard.edu/cgi-bin/bib_query?1995A%26A...296..315V

The paper was cited in following paper.:
Title: An Unusual Radio Galaxy in Abell 428: A Large, Powerful FR I Source in a Disk-dominated Host
Authors: Ledlow, Michael J.; Owen, Frazer N.; Keel, William C.
Bibliographic Code: 1998ApJ...495..227L
http://adsabs.harvard.edu/abs/1998ApJ...495..227L

Here is the GZ blog post about the observation by the HST.:
Something rich and strange – Hubble eyes NGC 5972
Quote
(...)This is a galaxy with active nucleus, large double radio source, and the most extensive ionized gas we turned up in the Voorwerpje project. (...)
http://blog.galaxyzoo.org/2012/07/12/something-rich-and-strange-hubble-eyes-ngc-5972/

PS: I informed about it also in following Objects of the Day.:

21 February, 2014: Very Strange Spirals?             : http://www.galaxyzooforum.org/index.php?topic=281632.75
15th July 2012      : The Voorwerpje of NGC 5972 : http://www.galaxyzooforum.org/index.php?topic=280278.0
« Last Edit: June 19, 2014, 06:24:49 pm by zutopian »