astronomers discover 18 new pulsars arecibo

Astronomers Discover 18 New Pulsars Using Arecibo Telescope Data

Discovery of 18 New Pulsars

Astronomers from West Virginia University, in collaboration with other institutions, have identified 18 new pulsars through the Arecibo Observatory, as a part of the AO 327-MHz Drift Survey. These discoveries were outlined in a paper published on February 6.

What Are Pulsars?

Pulsars are rapidly rotating neutron stars with strong magnetic fields that emit beams of electromagnetic radiation. Typically identified through brief radio bursts, some pulsars are also observed in optical, X-ray and gamma-ray wavelengths.

The AO327 Survey: Purpose and Scope

The AO327 survey, conducted with the Arecibo telescope at 327 MHz, operated from 2010 to December 2020. Its objective was to systematically search the entire Arecibo-visible sky (declinations between-1° and 38°) for pulsars and radio transients.

Key Findings from the AO327 Survey

By examining data from the AO327 survey, astronomers under the leadership of Timothy E.E. Olszański have uncovered 18 additional pulsars, raising the survey's overall pulsar count to 95.

Final Discoveries from the Arecibo Observatory

"With a total of 95 pulsars identified through the AO327 survey, these represent the final discoveries that can be further examined using the Arecibo Observatory," the researchers stated in their paper.

Analysis and Classification of Discovered Pulsars

Olszański and his team analyzed AO327 data, leading to the identification of 49 pulsars, 18 of which were newly discovered. They then obtained phase-connected timing solutions for all of them.

Characteristics of the Identified Pulsars

The analysis revealed that all identified pulsars, except for the partially recycled PSR J0916+0658, are non-recycled. Their spin periods vary from 40 milliseconds to 5.05 seconds and their dispersion measures fall within the range of 17.8 to 133.2 pc/cm³.

Unique Emission Phenomena in the Discovered Pulsars

The study reports that 29 pulsars in the sample exhibit only amplitude modulation, while one source displays subpulse drift exclusively and 13 show characteristics of both phenomena.

Rare Pulsar Phenomena

Researchers discovered that PSR J1942+0147 demonstrates the rare bi-drifting effect, whereas PSR J0225+1727 displays an interpulse offset by 164 degrees relative to the main pulse. Bi-drifting is a unique subpulse drift phenomenon characterized by opposing drift slopes in different components.

Future Prospects and Additional Discoveries

According to the astronomers, future investigations of the pulsars identified in this study will delve deeper into their emission characteristics and polarization properties. The AO327 survey is expected to yield additional pulsar discoveries.

Potential for Further Discoveries

The authors conclude that with less than 2% of survey observations yet to be processed and over 60% of search candidates still requiring inspection, at least 100 more pulsars are anticipated to be discovered.

Source

Exciting Discovery Alert in the World of Pulsars! Dive into the latest findings from the Arecibo Observatory, where astronomers have identified 18 new pulsars! Stay updated on space research and get insights into the universe's mysteries by reading more.

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Read the full article to learn how astronomers are revolutionizing our understanding of pulsars and deep space!