University of Hertfordshire

From the same journal

From the same journal

By the same authors

VVV Survey Microlensing: Catalog of Best and Forsaken Events

Research output: Contribution to journalArticlepeer-review

Documents

  • 190704339v2

    Accepted author manuscript, 4.1 MB, PDF document

  • Maria Gabriela Navarro
  • Rodrigo Contreras Ramos
  • Dante Minniti
  • Joyce Pullen
  • Roberto Capuzzo-Dolcetta
  • Philip W. Lucas
View graph of relations
Original languageEnglish
Article number65
Number of pages21
JournalThe Astrophysical Journal
Volume893
Issue1
DOIs
Publication statusPublished - 10 Apr 2020

Abstract

We search for microlensing events in the zero-latitude area of the Galactic Bulge using the VVV Survey near-IR data. We have discovered a total sample of N = 630 events within an area covering 20.68 deg 2 between the years 2010 and 2015. In this paper, we describe the search and present the data for the final sample, including near-IR magnitudes, colors, and proper motions, as well as the standard microlensing parameters. We use the near-IR color-magnitude and color-color diagrams to select N RC = 290 events with red-clump sources to analyze the extinction properties of the sample in the central region of the Galactic plane. The timescale distribution and its dependence in the longitude axis is presented. The mean timescale decreases as we approach the Galactic minor axis (b = 0ˆ). Finally, we give examples of special microlensing events, such as binaries, short-timescale events, and events with a strong parallax effect.

Notes

© 2020. The American Astronomical Society. All rights reserved.

ID: 22689740