Author Topic: Quasi-Stellar radio sources. Find a Quasar? Post it here!  (Read 305068 times)

c_cld

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #4905 on: May 09, 2014, 08:17:21 am »
Discovery of a red quasar with recurrent activity  arXiv:1405.1869 [astro-ph.GA]  Sumana Nandi et al. (Submitted on 8 May 2014)

Quote from: S. Nandi
We report a new double-double radio quasar, DDRQ, J0746+4526 which exhibits two cycles of episodic activity. From radio continuum observations at 607 MHz using the GMRT and 1400 MHz from the FIRST survey we confirm its episodic nature. We examine the SDSS optical spectrum and estimate the black hole mass to be (8.2±0.3)×107M⊙ from its observed MgII emission line, and the Eddington ratio to be 0.03. The black hole mass is significantly smaller than for the other reported DDRQ, J0935+0204, while the Eddington ratios are comparable. The SDSS spectrum is significantly red continuum dominated suggesting that it is highly obscured with E(B−V)host=0.70±0.16 mag. This high obscuration further indicates the existence of a large quantity of dust and gas along the line of sight, which may have a key role in triggering the recurrent jet activity in such objects.

SDSS J074617.92+452634.4 1237663530792125317






mosaic SDSS9 / FIRST with contours

 8)
« Last Edit: May 09, 2014, 08:33:54 am by c_cld »

c_cld

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Re: Quasar in GAMA survey
« Reply #4906 on: May 11, 2014, 06:57:14 pm »
1237648705127710909


GAMA survey cataid 695786


1237651735236116735


GAMA survey cataid 228236


1237653665250410565


GAMA survey cataid 727097


1237654604239077826


GAMA survey cataid 722323


1237654604775686390


GAMA survey cataid 516953


1237655693013811531


GAMA survey cataid 739967


1237674651003257074


GAMA survey cataid 695368



planetaryscience

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #4907 on: May 22, 2014, 12:51:31 am »
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

planetaryscience

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #4908 on: May 31, 2014, 11:16:53 pm »



Object Names (type)Object Names (type)
PKS 1948-10 (RadioS)MRC 1948-100 (RadioS)
2MASX J19513290-0955346 (IrS)NVSS J195133-095534 (RadioS)
2MASX J19513290-0955346 ID (G)VLSS J1951.5-0955 (RadioS)
PKS B1948-100 (RadioS)OV -180 (RadioS)
PKS J1951-0955 (RadioS)TXS 1948-100 (RadioS)
PMN J1951-0955 (RadioS)

I get the impression NED thinks it's a radio source.  ::)
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

planetaryscience

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #4909 on: June 10, 2014, 02:45:20 am »

SDSS J224241.04-080727.9



z=1.8444
distance= 8.3 Billion light years
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

zutopian

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« Last Edit: June 25, 2014, 06:31:50 am by zutopian »

planetaryscience

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Re: Quasi-Stellar radio sources. Find a Quasar? Post it here!
« Reply #4911 on: June 29, 2014, 11:32:01 pm »

2MASX J01312887-0827028



Z=0.14594
distance=1,772,000,000 light years

Very nearby (in terms of Quasars) object! :o
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

planetaryscience

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I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.