Y. P. Varshni

Bio: Y. P. Varshni is an academic researcher. The author has contributed to research in topics: Absorption spectroscopy. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.

Chance coincidences and the so-called redshift systems in the absorption spectrum of PKS 0237-23

Abstract: It is shown that the number of redshift systems based on Civ doublets, proposed by Borosonet al. (1978) in the absorption spectrum of the quasar PKS 0237-23, is insignificantly different from that that would be expected from chance coincidences. Consequently, these systems and theirz-values appear to be devoid of any physical significance.

Identification of lines in the spectrum of the quasar 0237-233

Abstract: The emission and absorption lines (δδ3716–4290) in the spectrum of the quasar 0237–233 are identified within the framework of the PLS model. The available evidence indicates that it is a helium star. Similarities between the spectral properties of 0237–233 and the star Upsilon Sagittarii are pointed out. Predictions are made for the absorption-line spectrum which falls outside δδ3716–4290 and also for an expected discontinuity at δ2600.

The quasar 0805+046 as a helium-rich shell star

Abstract: Within the framework of the plasma-laser star model of quasars it is proposed that the quasar 0805+046 is a helium-rich shell star. (a) The strong emission line at 4712 A is identified with Hei λ4713. (b) The discontinuity in the continuous energy distribution at λ3420 is identified with the helium discontinuity at λ3422. (c) In the absorption-line spectrum many lines have been identified. It is shown that the proposed model provides a consistent and satisfactory interpretation of the observed spectra.

Identification of lines in the spectrum of the quasar 0420-388

Abstract: The plasma-laser star model for quasars has been used to identify the emission and absorption lines as well as the continuum discontinuity in the spectrum of the quasar 0420-388. The Hei λ3680 discontinuity is identified for the first time in an astronomical spectra. Two predictions are made.

Common lines in the rest-frame absorption-line spectra of QSOs?

Abstract: Libbyet al. (1984) have studied the absorption-line data for 13 QSOs in the rest-frames of the QSOs. It is shown that the number of groups in which 5 lines or more lie within a wavelength interval of 1.0 A found by these authors is insignificantly different from that that would be expected from chance coincidences. Consequently, there is no evidence that the rest-frame wavelengths at which these groups occur have any special significance.