J/A+A/654/A116 Measured DIB 8620 (Zhao+, 2021)
The diffuse interstellar band around 8620 Å:
II. The kinematics and distance of the DIB carrier.
Zhao H., Schultheis M., Rojas-Arriagada A., Recio-Blanco A., de Laverny P.,
Kordopatis G., Surot F.
<Astron. Astrophys. 654, A116 (2021)>
=2021A&A...654A.116Z 2021A&A...654A.116Z (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Equivalent widths
Keywords: ISM: lines and bands - ISM: kinematics and dynamics -
dust, extinction - Galaxy: bulge
Abstract:
We made use of the measurements from the Giraffe Inner Bulge Survey
(GIBS) and the Gaia-ESO survey (GES) to study the kinematics and
distance of the carrier of the DIB at 862nm, as well as other
properties. We confirmed a tight relation between EW and E(J-Ks) as
well as Av, with similar fitting coefficients as found by previous
works. With a more accurate sample and the consideration of the solar
motion, the rest-frame wavelength of DIB 8620 was redetermined as
8620.83 angstroms. We studied the kinematics of the DIB carriers by
tracing their median radial velocities in each field in the local
standard of rest and into the galactocentric frame, respectively, as
a function of the Galactic longitudes. Based on the median velocity
and two Galactic rotation models, we got valid kinematic distances of
the DIB carriers for nine GIBS and ten GES fields. We also found a linear
relation between the DIB 8620 measured in this work and the near-infrared
DIB in APOGEE spectra at 1.5273 micron.
Description:
This catalog contains 2540 measurements of DIB 8620, of which 760 are
measured in the spectra from the Gaia-ESO survey (GES; Gilmore et al.,
2012Msngr.147...25G 2012Msngr.147...25G), and 1780 are from the the Giraffe Inner Bulge
Survey (GIBS; Zoccali et al., 2014A&A...562A..66Z 2014A&A...562A..66Z, Cat.
J/A+A/562/A66). GES is a public spectroscopic survey targeting all the
major components of the Milky Way with the purpose of characterizing
the chemistry and the kinematics of these populations. We made use of
the official public data release DR4 using the high-resolution grating
HR21 centered at 8757 angstroms with a spectral resolution of 16,200
on the GIRAFFE spectrograph. The DIB features in the spectra were
fitted by a Gaussian profile after subtracting the stellar components.
The EW was then calculated by the fitted depth and width of the
profile. The error of EW was estimated considering the contributions
of both the random noise and the mismatches between the observed and
synthetic spectra. The detailed description of DIB measurement in GIBS
spectra can be found in Zhao et al., (2021A&A...645A..14Z 2021A&A...645A..14Z, Cat.
J/A+A/645/A14).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
catalog.dat 96 2540 Measured DIB 8620
--------------------------------------------------------------------------------
See also:
J/A+A/562/A66 : GIRAFFE Inner Bulge Survey (GIBS). I. (Zoccali+, 2014)
J/A+A/645/A14 : GIBS sources equivalent widths (Zhao+, 2021)
Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 22 A22 --- Target GIBS/GES target ID
24- 27 A4 --- Source Target source (GES or GIBS)
29- 35 F7.2 deg GLON [] Galactic longitude
37- 41 F5.2 deg GLAT Galactic latitude
43- 49 F7.2 0.1nm cwave Measured central wavelength,
in the stellar frame
51- 54 F4.2 0.1nm e_cwave Error of cwave
56- 59 F4.2 0.1nm Width Width of the DIB profile
61- 64 F4.2 0.1nm e_Width Error of width
66- 70 F5.3 0.1nm EW Equivalent width
72- 76 F5.3 0.1nm e_EW Error of equivalent width
78- 82 F5.2 mag E(J-Ks) Color excess E(J-Ks)
84- 88 F5.2 kpc Dstar Stellar distance
90- 96 F7.2 km/s RV Stellar radial velocity
--------------------------------------------------------------------------------
Acknowledgements:
He Zhao, he.zhao(at)oca.eu
History:
Zhao et al., Paper I 2021A&A...645A..14Z 2021A&A...645A..14Z, Cat. J/A+A/645/A14
(End) Patricia Vannier [CDS] 23-Aug-2021