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J/A+A/600/A129  DIBs in APOGEE telluric standard star spectra (Elyajouri+, 2017)

Near-infrared diffuse interstellar bands in APOGEE telluric standard star spectra. Weak bands and comparisons with optical counterparts. Elyajouri M., Lallement R., Monreal-Ibero A., Capitanio L., Cox N.L.J. <Astron. Astrophys. 600, A129 (2017)> =2017A&A...600A.129E (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Equivalent widths Keywords: infrared: ISM - infrared: stars - ISM: lines and bands - dust, extinction - ISM: general Abstract: Information on the existence and properties of diffuse interstellar bands (DIBs) outside the optical domain is still limited. Additional infra-red (IR) measurements and IR-optical correlative studies are needed to constrain DIB carriers and locate various absorbers in 3D maps of the interstellar matter. We extended our study of H-band DIBs in Apache Point Observatory Galactic Evolution Experiment (APOGEE) Telluric Standard Star (TSS) spectra. We used the strong λ15273 band to select the most and least absorbed targets. We used individual spectra of the former subsample to extract weaker DIBs, and we searched the two stacked series for differences that could indicate additional bands. High-resolution NARVAL and SOPHIE optical spectra for a subsample of 55 TSS targets were additionally recorded for NIR/optical correlative studies. From the TSS spectra we extract a catalog of measurements of the poorly studied λλ15617, 15653, and 15673 DIBs in ∼300 sightlines, we obtain a first accurate determination of their rest wavelength and constrained their intrinsic width and shape. In addition, we studied the relationship between these weak bands and the strong λ15273 DIB.We provide a first or second confirmation of several other weak DIBs that have been proposed based on different instruments, and we add new constraints on their widths and locations. We finally propose two new DIB candidates. We compared the strength of the λ15273 15273 absorptions with their optical counterparts λλ5780, 5797, 6196, 6283, and 6614. Using the 5797-5780 ratio as a tracer of shielding against the radiation field, we showed that the λ15273 DIB carrier is significantly more abundant in unshielded (σ-type) clouds, and it responds even more strongly than the λ5780 band carrier to the local ionizing field. Description: A subset of ∼60 target stars from the APOGEE TSS list described in Sect. 3 has been observed in the visible with NARVAL, the spectropolarimeter of the Bernard Lyot telescope (2m) at Pic du Midi observatory, used in high-resolution spectroscopic mode (R~=80000). For all data the signal-to-noise ratio (S/N) is between 50 and 100. Two targets were observed twice in order check the estimated uncertainties. An additional subset of five targets was observed with the SOPHIE spectrograph at the 1.93m telescope of the Haute-Provence Observatory at a resolving power R~=39000. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5.dat 97 308 Equivalent widths and central wavelengths of the λλ15617, 15653, and 15673 DIBs
See also: II/149 : Diffuse Interstellar Band Measurements (Snow+ 1977) J/A+A/550/A108 : DIB in VLT-FLAMES Tarantula Survey (van Loon+, 2013) J/A+A/555/A25 : Equivalent widths of DIBs (Puspitarini+, 2013) J/ApJ/774/72 : 19 DIBs and 8 other interstellar lines (Kos+, 2013) J/ApJS/225/19 : SDSS-III APOGEE spectra DIBs measurements (Elyajouri+, 2006) J/MNRAS/463/2653 : 8620 DIB equivalent width and extinction (Damineli+, 2016) Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs) 19- 24 F6.2 deg GLON Galactic longitude 26- 32 F7.3 deg GLAT Galactic latitude 34- 35 I2 0.1pm EW15617 ?=- DIB equivalent width at 15617Å 37- 39 I3 0.1pm e_EW15617 ?=- rms uncertainty on EW15617 41- 43 I3 0.1pm EW15653 ? DIB equivalent width at 15653Å 45- 47 I3 0.1pm e_EW15653 ? rms uncertainty on EW15653 49- 51 I3 0.1pm EW15673 ?=- DIB equivalent width at 15673Å 53- 54 I2 0.1pm e_EW15673 ?=- rms uncertainty on EW15673 56- 62 F7.1 0.1nm lc15617 ?=- Central wavelength of 15617 DIB (1) 64- 66 F3.1 0.1nm e_lc15617 ?=- rms uncertainty on lc15617 68- 74 F7.1 0.1nm lc15653 ?=- Central wavelength of 15653 DIB (1) 76- 78 F3.1 0.1nm e_lc15653 ?=- rms uncertainty on lc15653 80- 86 F7.1 0.1nm lc15673 ?=- Central wavelength of 15673 DIB (1) 88- 90 F3.1 0.1nm e_lc15673 ?=- rms uncertainty on lc15673 92- 97 F6.2 km/s RV Radial velocity
Note (1): The wavelengths are in the APOGEE stellar frame and can be converted into heliocentric wavelengths using the stellar radial velocity listed in the last column.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 10-Apr-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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