• Y.-P. Qin

Articles written in Journal of Astrophysics and Astronomy

• Fundamental Plane of FSRQs from SDSS DR5 Quasar Catalogue

In this work, we explore a sample of 362 flat-spectrum radio quasars (FSRQs) to investigate the jet formation. We find that the fundamental plane for our FSRQs can be expressed as 𝐿5\;GHz ∝ 𝑀$^{-0.19}_{\text{bh}}$ 𝐿$^{1.08}_{\text{2\; keV}}$. We also find that the 5 GHz luminosities are tightly related to both black hole mass and Eddington ratio, which is established as 𝐿5\;GHz ∝ 𝑀$^{0.67}_{\text{bh}}$ (𝐿bol/𝐿EDD)1.32.

• Curvature Effect and the Spectral Softening Phenomenon Detected in GRB Afterglows

Detection of radiation from a relativistic fireball would be affected by the so-called curvature effect. I illustrate the expected temporal and spectral behaviours of this effect and show that it can well explain the observed spectral softening in the early GRB afterglows.

• The Size of Narrow Line Region and [OIII] Luminosity Analyzed from SDSS DR7 Quasar Catalogue

In this work, we constructed a sample of 4002 quasars from SDSS DR7 quasar catalogue to calculate the electron density and size of narrow line region. We find that the electron densities are ∼ 103/cm3, and the sizes are between 27 and 775 pc. We also find that, in the ionization cone, the sizes are tightly correlated with the luminosities of [OIII]𝛾5007.

• Identification of MgII Absorption Line Systems from SDSS Quasar Catalogue

• # Journal of Astrophysics and Astronomy

Volume 41, 2020
All articles
Continuous Article Publishing mode

• # Continuous Article Publication

Posted on January 27, 2016

Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019