Quasars and modern Astronomy

Quasars , what the heck are they ?

Quasistellar objects, or quasars, were defined originally as star-like objects of large redshift. Today,
quasars are considered to be the most luminous members of the general class of objects called active galactic nuclei, or AGNs. Quasars are the brightest objects in the universe

We know about quasars because of observations from telescopes.

They are highly luminous and active, from which grow into active galaxies.

There is a lot of activity going on these quasars, matter formation, star creation.


We google Quasars and get from Wiki

“Quasars or quasi-stellar radio sources are the most energetic of a class of objects called active galactic nuclei (AGN). Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that appeared to be similar to stars, rather than extended sources similar to galaxies. Their spectra contain very broad emission lines, unlike any known from stars, hence the name “quasi-stellar.” Their luminosity can be 100 times greater than that of the Milky Way.”

Which is basically telling us, these things pump out energy !!

Then it all turns pear shaped with the media and Astronomy, they go on to say, as if on the drive for research dollars. “Most quasars were formed approximately 12 billion years ago caused by collisions of galaxies and their central black holes merging to form a supermassive black hole.”

A classic example of this is microquasar IGR J17091-3624. Once again if we look the IGR number up we get, from Wiki a Black hole and you may find in a  number of science article they refer to this system as proof of a black hole !

Is there any rational discussion about this system going on ?

Well yes but I suppose it depends how far you want to venture down the rabbit hole. Well it didn’t take me long and I found.

“Microquasar IGR J17091-3624 exhibits faint, quasi-periodical outbursts of the period between 5 and 70 seconds and regular amplitudes, frequently referred to as the
’heartbeat state’. ”

From here

Click to access MGrzedzielski_p.pdf

Quasars what are they ?

The Astrophysical Journal, 553:L11–L13, 2001 May 20


H. C. Arp
Max-Planck-Institut fu¨r Astrophysik, Karl-Schwarzschild-Strasse 1, 85741 Garching, Germany
E. M. Burbidge
University of California San Diego Center for Astrophysics and Space Sciences, La Jolla, CA 92093-0424
Y. Chu and X. Zhu
Center for Astrophysics, University of Science and Technology of China, Hefei, Anhui 230026, China
Received 2001 February 6; accepted 2001 April 11; published 2001 May 8

 All of the evidence suggests that these QSOs have been ejected from z p 1.25
Arp 220 and have large intrinsic redshifts.

Click to access 015086.web.pdf

Well they are not black holes.

Milky way star filaments found, latest space news

New Herschel Images Reveal How Matter is Distributed Across Our Milky Way

May 29, 2015


Image Reveals How Matter is Distributed Across Our Milky Way

This new image of filament G49 reveals how matter is distributed across our Milky Way galaxy.

New images of huge filamentary structures of gas and dust from the Herschel space observatory reveal how matter is distributed across our Milky Way galaxy. Long and flimsy threads emerge from a twisted mix of material, taking on complex shapes.

This image shows a filament called G49, which contains 80,000 suns’ worth of mass. This huge but slender structure of gas and dust extends about 280 light-years in length, while its diameter is only about 5 light-years across.

In this image, longer-wavelength light has been assigned visible colors. Light with wavelengths of 70 microns is blue; 160-micron light is green; and 350-micron light is red. Cooler gas and dust are seen in red and yellow, with temperatures as low as minus 421 degrees Fahrenheit (minus 252 degrees Celsius).

In the densest and coolest clumps, the seeds of new generations of stars are taking shape. A brighter clump of matter is visible at the left tip of the wispy thread.

This filament is about 18,000 light-years away. The image is oriented with northeast toward the left of the image and southwest toward the right.

Herschel is a European Space Agency mission, with science instruments provided by consortia of European institutes and with important participation by NASA. While the observatory stopped making science observations in April 2013, after running out of liquid coolant as expected, scientists continue to analyze its data. NASA’s Herschel Project Office is based at NASA’s Jet Propulsion Laboratory, Pasadena, California. JPL contributed mission-enabling technology for two of Herschel’s three science instruments. The NASA Herschel Science Center, part of the Infrared Processing and Analysis Center at the California Institute of Technology in Pasadena, supports the U.S. astronomical community. Caltech manages JPL for NASA.

Publication: Ke Wang, et al., “Large-scale filaments associated with Milky Way spiral arms,” MNRAS (July 11, 2015) 450 (4): 4043-4049; doi: 10.1093/mnras/stv735

PDF Copy of the Study: Large scale filaments associated with Milky Way spiral arms

Source: NASA