J/ApJ/711/L48 2008 OGLE Bulge microlensing alerts (Cohen+, 2010)
A puzzle involving Galactic bulge microlensing events.
Cohen J.G., Gould A., Thompson I.B., Feltzing S., Bensby T., Johnson J.A.,
Huang W., Melendez J., Lucatello S., Asplund M.
<Astrophys. J., 711, L48-L52 (2010)>
=2010ApJ...711L..48C 2010ApJ...711L..48C
ADC_Keywords: Gravitational lensing
Keywords: Galaxy: bulge - gravitational lensing: micro - stars: abundances
Abstract:
We study a sample of 16 microlensed Galactic bulge main-sequence
turnoff region stars for which high-dispersion spectra have been
obtained with detailed abundance analyses. We demonstrate that there
is a very strong and highly statistically significant correlation
between the maximum magnification of the microlensed bulge star and
the value of the [Fe/H] deduced from the high resolution spectrum of
each object.
Description:
All of these stars were observed with either HIRES at the Keck I
telescope or the MIKE spectrograph at the 6.5m Magellan Clay Telescope
at the Las Campanas Observatory.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 27 536 Check of 2008 OGLE Bulge microlensing alerts
--------------------------------------------------------------------------------
See also:
J/AcA/50/1 : OGLE microlensing events in Galactic Bulge (Udalski+, 2000)
J/AcA/51/175 : OGLE-II DIA microlensing events (Wozniak+, 2001)
J/MNRAS/343/1131 : 1998-2000 OGLE events microlensing limits (Tsapras+, 2003)
J/ApJ/631/906 : MACHO Galactic Bulge microlensing events (Thomas+, 2005)
J/A+A/466/157 : Bulge Microlensing Events (Soto+, 2007)
http://www.astrouw.edu.pl/~ogle/ogle3 : OGLE3 Home Page
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- OGLE The OGLE identification number
5- 10 F6.4 --- u0 Separation for lens (1)
12- 18 F7.3 d tE Einstein radius crossing time (2)
20- 25 F6.3 mag Imag Unlensed source I band magnitude
27 I1 --- Code [1/2] 1=original values unchanged, 2=altered
--------------------------------------------------------------------------------
Note (1): From the source-observer line of sight,
in units of Einstein ring radii.
Note (2): Or the Einstein ring radius divided by the relative tangential
velocity of the source with respect to the lens.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 12-Jan-2013