J/ApJS/225/19 DIBs measurements from SDSS-III APOGEE spectra (Elyajouri+, 2016)
A catalog of 1.5273um diffuse interstellar bands based on APOGEE hot telluric
calibrators.
Elyajouri M., Monreal-Ibero A., Remy Q., Lallement R.
<Astrophys. J. Suppl. Ser., 225, 19-19 (2016)>
=2016ApJS..225...19E 2016ApJS..225...19E (SIMBAD/NED BibCode)
ADC_Keywords: Spectra, infrared ; Equivalent widths ; Interstellar medium
Keywords: dust, extinction; ISM: lines and bands
Abstract:
High resolution stellar spectroscopic surveys provide massive amounts
of diffuse interstellar bands (DIBs) measurements. Data can be used to
study the distribution of the DIB carriers and those environmental
conditions that favor their formation. In parallel, recent studies
have also proved that DIBs extracted from stellar spectra constitute
new tools for building the 3D structure of the Galactic interstellar
medium (ISM). The amount of details on the structure depends directly
on the quantity of available lines of sight. Therefore there is a need
to construct databases of high-quality DIB measurements as large as
possible. We aim at providing the community with a catalog of
high-quality measurements of the 1.5273µm DIB toward a large
fraction of the Apache Point Observatory Galactic Evolution Experiment
(APOGEE) hot stars observed to correct for the telluric absorption and
not used for ISM studies so far. This catalog would complement the
extensive database recently extracted from the APOGEE observations and
used for 3D ISM mapping. We devised a method to fit the stellar
continuum of the hot calibration stars and extracted the DIB from the
normalized spectrum. Severe selection criteria based on the absorption
characteristics are applied to the results. In particular limiting
constraints on the DIB widths and Doppler shifts are deduced from the
HI 21cm measurements, following a new technique of decomposition of
the emission spectra. From ∼16000 available hot telluric spectra we
have extracted ∼6700 DIB measurements and their associated
uncertainties. The statistical properties of the extracted absorptions
are examined and our selection criteria are shown to provide a robust
dataset. The resulting catalog contains the DIB total equivalent
widths, central wavelengths and widths. We briefly illustrate its
potential use for the stellar and interstellar communities.
Description:
This work is based on the products from the SDSS data release 12
(DR12, Alam et al. 2015ApJS..219...12A 2015ApJS..219...12A). This release includes all the
data taken between 2011 April and 2014 July. The SDSS-III APOGEE
spectra can be downloaded from the Science Archive Server (SAS).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 72 6711 Sample stars with 15273 Angstrom diffuse
interstellar band (DIB) detection
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)
J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)
J/AJ/149/7 : SDSS-III/APOGEE. I. Be stars (Chojnowski+, 2015)
J/other/Sci/345.791 : Pseudo-3D maps of DIB at 862nm (Kos+ 2014)
J/ApJ/786/29 : Catalog of distances to molecular clouds (Schlafly+, 2014)
J/A+A/555/A25 : Equivalent widths of DIBs (Puspitarini+, 2013)
J/A+A/550/A108 : DIB in VLT-FLAMES Tarantula Survey (van Loon+, 2013)
J/A+A/544/A136 : Diffuse Interstellar Bands in 150 stars (Raimond+, 2012)
J/ApJS/199/8 : Interstellar column densities compilation (Gudennavar+, 2012)
J/ApJ/733/91 : Diffuse interstellar band equivalent widths (Xiang+, 2011)
J/ApJ/708/1628 : Diffuse interstellar bands. IV. (McCall+, 2010)
J/ApJ/705/32 : Diffuse interstellar bands from HD 183143 (Hobbs+, 2009)
J/A+A/429/559 : Diffuse Interstellar Bands in NGC 1448 (Sollerman+, 2005)
J/MNRAS/358/563 : Diffuse Interstellar Bands in 49 stars (Megier+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [2MASS]
6- 22 A17 --- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
24- 30 F7.3 deg GLON Galactic longitude
32- 38 F7.3 deg GLAT Galactic latitude
40- 46 F7.1 0.1nm lamC [15268/15280] Central wavelength (λc);
in Angstroms
48- 50 F3.1 0.1nm e_lamC [0/10]? Uncertainty in lamC
52- 54 F3.1 0.1nm sigma [0.7/4.4] Line width; Angstroms
56- 58 F3.1 0.1nm e_sigma [0/10]? Uncertainty sigma
60- 62 I3 0.1nm EW [0/383] DIB equivalent width; Angstroms
64- 66 I3 0.1nm e_EW [3/94] Uncertainty in EW
68 I1 --- Flag [1/7] Flag (1)
70- 72 I3 0.1nm EWH21 [3/995]? HI 21cm line equivalent width;
in Angstroms
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Note (1): Flag as follows:
1 = Upper limit;
2 = Stars from plate 4529;
3 = Be Stars;
4 = Narrow recovered DIBs;
5 = Narrow DIBs;
6 = Recovered;
7 = Detected.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Oct-2016