VVV survey microlensing events; -3.7<b{<}-3.9{deg} Virtual Observatory Resource

Authors
  1. Navarro M.G.
  2. Minniti D.
  3. Pullen J.
  4. Ramos R.C.
  5. Published by
    CDS
Abstract

We search for microlensing events in fields along the Galactic minor axis, ranging from the Galactic center to -3.7{deg}<b<3.9{deg} using the VISTA Variables in the Via Lactea (VVV) survey near-IR photometry. The new search is made across VVV tiles b291, b305, b319, b347, b361, and b375, covering a total area of about 11.5deg^2^. We find a total of N=238 new microlensing events in this new area, N=74, which are classified as bulge red clump (RC) giant sources. Combining them with N=122 events that we had previously reported in the Galactic center (VVV tile b333), allows us to study the latitude distribution of the microlensing events reaching the Galactic plane at b=00 for the first time. We find a very strong dependence of the number of microlensing events with Galactic latitude, a number that increases rapidly toward the Galactic center by one order of magnitude from |b|=2{deg} to b=0{deg} with a much steeper gradient than with Galactic longitude. The microlensing event population shows a flattened distribution (axial ratio b/a~1.5). The final sample shows a shorter mean timescale distribution than the Galactic plane sample for both the complete population and RC stars.

Keywords
  1. Galactic center
  2. Gravitational lensing
  3. Infrared photometry
Bibliographic source Bibcode
2020ApJ...889...56N
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/889/56
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/889/56
Document Object Identifer DOI
doi:10.26093/cds/vizier.18890056

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/889/56
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/889/56
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/889/56
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/889/56/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/889/56/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/889/56/table2?

History

2021-08-06T12:32:22Z
Resource record created
2021-08-06T12:32:22Z
Created
2022-11-03T07:00:08Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr