| Name: | RITISH KUMAR |
| Affiliation: | Central University of Himachal Pradesh |
| Conference ID : | ASI2024_667 |
| Title : | On the incidence of strong MgII absorbers along the FSRQ vs SSRQ Sightlines |
| Authors : | Ritish Kumar, Sapna Mishra, Hum Chand
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| Authors Affiliation: | Ritish Affiliation (Central University of Himachal Pradesh, India) ,
Sapna Mishra Affiliation (Space Telescope Science Institute NASA) ,
Hum Chand Affiliation (Central University of Himachal Pradesh, India)
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| Mode of Presentation: | Oral |
| Abstract Category : | Galaxies and Cosmology |
| Abstract : | It has been well established that steep spectrum radio quasars (SSRQs) are among the evolved quasar population compared to the flat spectrum radio quasar (FSRQs). As a result, the existing relativistic jets in such objects would get more time to interact with the surrounding material present in the circumgalactic environment as well as in the intergalactic medium. In this scenario, more materials might be swept up by the jet and accelerated to high velocities.
Therefore one expects an excess of associated systems (i.e. within the velocity offsets of 5000 km/s relative to the background quasar) in the environment of SSRQs compared to the environment of FSRQs. Here we report first time a quantitative comparison of number density of associated and intervening strong (W𝑟(2796) ≥1.0Å) MgII absorbers towards the 436 SSRQ and 340 FSRQ SDSS sight lines. Our analysis shows no excess in the average value of dN/dz reported for both SSRQs and FSRQs. However, the cumulative number of strong MgII absorbers is more in case of SSRQs than FSRQs and reaches a similar distribution for about the velocity offset of 60000 km/s . Our analysis yields an excess of associated absorbers in case of SSRQs than FSRQs.
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