000006552 001__ 6552
000006552 005__ 20240109104628.0
000006552 0247_ $$2DOI$$a10.1051/0004-6361/202347103
000006552 037__ $$aSCART-2024-0009
000006552 100__ $$aGaia Collaboration
000006552 245__ $$aGaia Focused Product Release: Spatial distribution of two diffuse interstellar bands 
000006552 260__ $$c2023
000006552 520__ $$aDiffuse interstellar bands (DIBs) are absorption features seen in optical and infrared spectra of stars and extragalactic objects that are probably caused by large and complex molecules in the galactic interstellar medium (ISM). Here we investigate the Galactic distribution and properties of two DIBs identified in almost six million stellar spectra collected by the Gaia Radial Velocity Spectrometer. These measurements constitute a part of the Gaia Focused Product Release to be made public between the Gaia DR3 and DR4 data releases. In order to isolate the DIB signal from the stellar features in each individual spectrum, we identified a set of 160 000 spectra at high Galactic latitudes (|b| ⩾ 65°) covering a range of stellar parameters which we consider to be the DIB-free reference sample. Matching each target spectrum to its closest reference spectra in stellar parameter space allowed us to remove the stellar spectrum empirically, without reference to stellar models, leaving a set of six million ISM spectra. Using the star's parallax and sky coordinates, we then allocated each ISM spectrum to a voxel (VOlume piXEL) on a contiguous three-dimensional grid with an angular size of 1.8° (level 5 HEALPix) and 29 unequally sized distance bins. Identifying the two DIBs at 862.1 nm (λ862.1) and 864.8 nm (λ864.8) in the stacked spectra, we modelled their shapes and report the depth, central wavelength, width, and equivalent width (EW) for each, along with confidence bounds on these measurements. We then explored the properties and distributions of these quantities and compared them with similar measurements from other surveys. Our main results are as follows: (1) the strength and spatial distribution of the DIB λ862.1 are very consistent with what was found in Gaia DR3, but for this work we attained a higher signal-to-noise ratio in the stacked spectra to larger distances, which allowed us to trace DIBs in the outer spiral arm and beyond the Scutum-Centaurus spiral arm; (2) we produced an all-sky map below ±65° of Galactic latitude to ~4000 pc of both DIB features and their correlations; (3) we detected the signals of DIB λ862.1 inside the Local Bubble (≲200 pc); and (4) there is a reasonable correlation with the dust reddening found from stellar absorption and EWs of both DIBs with a correlation coefficient of 0.90 for λ862.1 and 0.77 for λ864.8. 
000006552 536__ $$aGaia Prodex/$$cGaia Prodex/$$fGaia Prodex
000006552 594__ $$aNO
000006552 6531_ $$aISM: lines and bands
000006552 6531_ $$adust
000006552 6531_ $$aextinction
000006552 6531_ $$aAstrophysics - Astrophysics of Galaxies
000006552 6531_ $$aAstrophysics - Solar and Stellar Astrophysics 
000006552 700__ $$aSchultheis, M.
000006552 700__ $$aZhao, H.
000006552 700__ $$aZwitter, T.
000006552 700__ $$aBailer-Jones, C. A. L.
000006552 700__ $$aCarballo, R.
000006552 700__ $$aSordo, R.
000006552 700__ $$aDrimmel, R.
000006552 700__ $$aOrdenovic, C.
000006552 700__ $$aPailler, F.
000006552 700__ $$aFouesneau, M.
000006552 700__ $$aCreevey, O. L.
000006552 700__ $$aHeiter, U.
000006552 700__ $$aRecio-Blanco, A.
000006552 700__ $$aKordopatis, G.
000006552 700__ $$ade Laverny, P.
000006552 700__ $$aMarshall, D. J.
000006552 700__ $$aDharmawardena, T. E.
000006552 700__ $$aBrown, A. G. A.
000006552 700__ $$aVallenari, A.
000006552 700__ $$aPrusti, T.
000006552 700__ $$ade Bruijne, J. H. J.
000006552 700__ $$aArenou, F.
000006552 700__ $$aBabusiaux, C.
000006552 700__ $$aBarbier, A.
000006552 700__ $$aBiermann, M.
000006552 700__ $$aDucourant, C.
000006552 700__ $$aEvans, D. W.
000006552 700__ $$aEyer, L.
000006552 700__ $$aGuerra, R.
000006552 700__ $$aHutton, A.
000006552 700__ $$aJordi, C.
000006552 700__ $$aKlioner, S. A.
000006552 700__ $$aLammers, U.
000006552 700__ $$aLindegren, L.
000006552 700__ $$aLuri, X.
000006552 700__ $$aMignard, F.
000006552 700__ $$aRandich, S.
000006552 700__ $$aSartoretti, P.
000006552 700__ $$aSmiljanic, R.
000006552 700__ $$aTanga, P.
000006552 700__ $$aWalton, N. A.
000006552 700__ $$aBastian, U.
000006552 700__ $$aCropper, M.
000006552 700__ $$aKatz, D.
000006552 700__ $$aSoubiran, C.
000006552 700__ $$avan Leeuwen, F.
000006552 700__ $$aAndrae, R.
000006552 700__ $$aAudard, M.
000006552 700__ $$aBakker, J.
000006552 700__ $$aBlomme, R.
000006552 700__ $$aCastañeda, J.
000006552 700__ $$aDe Angeli, F.
000006552 700__ $$aFabricius, C.
000006552 700__ $$aFrémat, Y.
000006552 700__ $$aGalluccio, L.
000006552 700__ $$aGuerrier, A.
000006552 700__ $$aMasana, E.
000006552 700__ $$aMessineo, R.
000006552 700__ $$aNicolas, C.
000006552 700__ $$aNienartowicz, K.
000006552 700__ $$aPanuzzo, P.
000006552 700__ $$aRiclet, F.
000006552 700__ $$aRoux, W.
000006552 700__ $$aSeabroke, G. M.
000006552 700__ $$aThévenin, F.
000006552 700__ $$aGracia-Abril, G.
000006552 700__ $$aPortell, J.
000006552 700__ $$aTeyssier, D.
000006552 700__ $$aAltmann, M.
000006552 700__ $$aBenson, K.
000006552 700__ $$aBerthier, J.
000006552 700__ $$aBurgess, P. W.
000006552 700__ $$aBusonero, D.
000006552 700__ $$aBusso, G.
000006552 700__ $$aCánovas, H.
000006552 700__ $$aCarry, B.
000006552 700__ $$aCheek, N.
000006552 700__ $$aClementini, G.
000006552 700__ $$aDamerdji, Y.
000006552 700__ $$aDavidson, M.
000006552 700__ $$ade Teodoro, P.
000006552 700__ $$aDelchambre, L.
000006552 700__ $$aDell'Oro, A.
000006552 700__ $$aFraile Garcia, E.
000006552 700__ $$aGarabato, D.
000006552 700__ $$aGarcía-Lario, P.
000006552 700__ $$aGarralda Torres, N.
000006552 700__ $$aGavras, P.
000006552 700__ $$aHaigron, R.
000006552 700__ $$aHambly, N. C.
000006552 700__ $$aHarrison, D. L.
000006552 700__ $$aHatzidimitriou, D.
000006552 700__ $$aHernández, J.
000006552 700__ $$aHodgkin, S. T.
000006552 700__ $$aHoll, B.
000006552 700__ $$aJamal, S.
000006552 700__ $$aJordan, S.
000006552 700__ $$aKrone-Martins, A.
000006552 700__ $$aLanzafame, A. C.
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000006552 700__ $$aMoitinho, A.
000006552 700__ $$aMuinonen, K.
000006552 700__ $$aNuñez Campos, M.
000006552 700__ $$aOreshina-Slezak, I.
000006552 700__ $$aOsborne, P.
000006552 700__ $$aPancino, E.
000006552 700__ $$aPauwels, T.
000006552 700__ $$aRiello, M.
000006552 700__ $$aRimoldini, L.
000006552 700__ $$aRobin, A. C.
000006552 700__ $$aRoegiers, T.
000006552 700__ $$aSarro, L. M.
000006552 700__ $$aSiopis, C.
000006552 700__ $$aSmith, M.
000006552 700__ $$aSozzetti, A.
000006552 700__ $$aUtrilla, E.
000006552 700__ $$avan Leeuwen, M.
000006552 700__ $$aWeingrill, K.
000006552 700__ $$aAbbas, U.
000006552 700__ $$aÁbrahám, P.
000006552 700__ $$aAbreu Aramburu, A.
000006552 700__ $$aAerts, C.
000006552 700__ $$aAltavilla, G.
000006552 700__ $$aÁlvarez, M. A.
000006552 700__ $$aAlves, J.
000006552 700__ $$aAnders, F.
000006552 700__ $$aAnderson, R. I.
000006552 700__ $$aAntoja, T.
000006552 700__ $$aBaines, D.
000006552 700__ $$aBaker, S. G.
000006552 700__ $$aBalog, Z.
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000006552 700__ $$aBarbato, D.
000006552 700__ $$aBarros, M.
000006552 700__ $$aBarstow, M. A.
000006552 700__ $$aBartolomé, S.
000006552 700__ $$aBashi, D.
000006552 700__ $$aBauchet, N.
000006552 700__ $$aBaudeau, N.
000006552 700__ $$aBecciani, U.
000006552 700__ $$aBedin, L. R.
000006552 700__ $$aBellas-Velidis, I.
000006552 700__ $$aBellazzini, M.
000006552 700__ $$aBeordo, W.
000006552 700__ $$aBerihuete, A.
000006552 700__ $$aBernet, M.
000006552 700__ $$aBertolotto, C.
000006552 700__ $$aBertone, S.
000006552 700__ $$aBianchi, L.
000006552 700__ $$aBinnenfeld, A.
000006552 700__ $$aBlazere, A.
000006552 700__ $$aBoch, T.
000006552 700__ $$aBombrun, A.
000006552 700__ $$aBouquillon, S.
000006552 700__ $$aBragaglia, A.
000006552 700__ $$aBraine, J.
000006552 700__ $$aBramante, L.
000006552 700__ $$aBreedt, E.
000006552 700__ $$aBressan, A.
000006552 700__ $$aBrouillet, N.
000006552 700__ $$aBrugaletta, E.
000006552 700__ $$aBucciarelli, B.
000006552 700__ $$aButkevich, A. G.
000006552 700__ $$aBuzzi, R.
000006552 700__ $$aCaffau, E.
000006552 700__ $$aCancelliere, R.
000006552 700__ $$aCannizzo, S.
000006552 700__ $$aCarlucci, T.
000006552 700__ $$aCarnerero, M. I.
000006552 700__ $$aCarrasco, J. M.
000006552 700__ $$aCarretero, J.
000006552 700__ $$aCarton, S.
000006552 700__ $$aCasamiquela, L.
000006552 700__ $$aCastellani, M.
000006552 700__ $$aCastro-Ginard, A.
000006552 700__ $$aCesare, V.
000006552 700__ $$aCharlot, P.
000006552 700__ $$aChemin, L.
000006552 700__ $$aChiaramida, V.
000006552 700__ $$aChiavassa, A.
000006552 700__ $$aChornay, N.
000006552 700__ $$aCollins, R.
000006552 700__ $$aContursi, G.
000006552 700__ $$aCooper, W. J.
000006552 700__ $$aCornez, T.
000006552 700__ $$aCrosta, M.
000006552 700__ $$aCrowley, C.
000006552 700__ $$aDafonte, C.
000006552 700__ $$aDe Luise, F.
000006552 700__ $$aDe March, R.
000006552 700__ $$ade Souza, R.
000006552 700__ $$ade Torres, A.
000006552 700__ $$adel Peloso, E. F.
000006552 700__ $$aDelbo, M.
000006552 700__ $$aDelgado, A.
000006552 700__ $$aDiakite, S.
000006552 700__ $$aDiener, C.
000006552 700__ $$aDistefano, E.
000006552 700__ $$aDolding, C.
000006552 700__ $$aDsilva, K.
000006552 700__ $$aDurán, J.
000006552 700__ $$aEnke, H.
000006552 700__ $$aEsquej, P.
000006552 700__ $$aFabre, C.
000006552 700__ $$aFabrizio, M.
000006552 700__ $$aFaigler, S.
000006552 700__ $$aFatović, M.
000006552 700__ $$aFedorets, G.
000006552 700__ $$aFernández-Hernández, J.
000006552 700__ $$aFernique, P.
000006552 700__ $$aFigueras, F.
000006552 700__ $$aFournier, Y.
000006552 700__ $$aFouron, C.
000006552 700__ $$aGai, M.
000006552 700__ $$aGalinier, M.
000006552 700__ $$aGarcia-Gutierrez, A.
000006552 700__ $$aGarcía-Torres, M.
000006552 700__ $$aGarofalo, A.
000006552 700__ $$aGerlach, E.
000006552 700__ $$aGeyer, R.
000006552 700__ $$aGiacobbe, P.
000006552 700__ $$aGilmore, G.
000006552 700__ $$aGirona, S.
000006552 700__ $$aGiuffrida, G.
000006552 700__ $$aGomel, R.
000006552 700__ $$aGomez, A.
000006552 700__ $$aGonzález-Núñez, J.
000006552 700__ $$aGonzález-Santamaría, I.
000006552 700__ $$aGosset, E.
000006552 700__ $$aGranvik, M.
000006552 700__ $$aGregori Barrera, V.
000006552 700__ $$aGutiérrez-Sánchez, R.
000006552 700__ $$aHaywood, M.
000006552 700__ $$aHelmer, A.
000006552 700__ $$aHelmi, A.
000006552 700__ $$aHenares, K.
000006552 700__ $$aHidalgo, S. L.
000006552 700__ $$aHilger, T.
000006552 700__ $$aHobbs, D.
000006552 700__ $$aHottier, C.
000006552 700__ $$aHuckle, H. E.
000006552 700__ $$aJabłońska, M.
000006552 700__ $$aJansen, F.
000006552 700__ $$aJiménez-Arranz, Ó.
000006552 700__ $$aJuaristi Campillo, J.
000006552 700__ $$aKhanna, S.
000006552 700__ $$aKorn, A. J.
000006552 700__ $$aKóspál, Á.
000006552 700__ $$aKostrzewa-Rutkowska, Z.
000006552 700__ $$aKun, M.
000006552 700__ $$aLambert, S.
000006552 700__ $$aLanza, A. F.
000006552 700__ $$aLe Campion, J. -F.
000006552 700__ $$aLebreton, Y.
000006552 700__ $$aLebzelter, T.
000006552 700__ $$aLeccia, S.
000006552 700__ $$aLecoeur-Taibi, I.
000006552 700__ $$aLecoutre, G.
000006552 700__ $$aLiao, S.
000006552 700__ $$aLiberato, L.
000006552 700__ $$aLicata, E.
000006552 700__ $$aLindstrøm, H. E. P.
000006552 700__ $$aLister, T. A.
000006552 700__ $$aLivanou, E.
000006552 700__ $$aLobel, A.
000006552 700__ $$aLoup, C.
000006552 700__ $$aMahy, L.
000006552 700__ $$aMann, R. G.
000006552 700__ $$aManteiga, M.
000006552 700__ $$aMarchant, J. M.
000006552 700__ $$aMarconi, M.
000006552 700__ $$aMarín Pina, D.
000006552 700__ $$aMarinoni, S.
000006552 700__ $$aMartín Lozano, J.
000006552 700__ $$aMartín-Fleitas, J. M.
000006552 700__ $$aMarton, G.
000006552 700__ $$aMary, N.
000006552 700__ $$aMasip, A.
000006552 700__ $$aMassari, D.
000006552 700__ $$aMastrobuono-Battisti, A.
000006552 700__ $$aMazeh, T.
000006552 700__ $$aMcMillan, P. J.
000006552 700__ $$aMeichsner, J.
000006552 700__ $$aMessina, S.
000006552 700__ $$aMichalik, D.
000006552 700__ $$aMillar, N. R.
000006552 700__ $$aMints, A.
000006552 700__ $$aMolina, D.
000006552 700__ $$aMolinaro, R.
000006552 700__ $$aMolnár, L.
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000006552 700__ $$aMor, R.
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000006552 700__ $$aMorbidelli, R.
000006552 700__ $$aMorel, T.
000006552 700__ $$aMorris, D.
000006552 700__ $$aMowlavi, N.
000006552 700__ $$aMunoz, D.
000006552 700__ $$aMuraveva, T.
000006552 700__ $$aMurphy, C. P.
000006552 700__ $$aMusella, I.
000006552 700__ $$aNagy, Z.
000006552 700__ $$aNieto, S.
000006552 700__ $$aNoval, L.
000006552 700__ $$aOgden, A.
000006552 700__ $$aPagani, C.
000006552 700__ $$aPagano, I.
000006552 700__ $$aPalaversa, L.
000006552 700__ $$aPalicio, P. A.
000006552 700__ $$aPallas-Quintela, L.
000006552 700__ $$aPanahi, A.
000006552 700__ $$aPanem, C.
000006552 700__ $$aPayne-Wardenaar, S.
000006552 700__ $$aPegoraro, L.
000006552 700__ $$aPenttilä, A.
000006552 700__ $$aPesciullesi, P.
000006552 700__ $$aPiersimoni, A. M.
000006552 700__ $$aPinamonti, M.
000006552 700__ $$aPineau, F. -X.
000006552 700__ $$aPlachy, E.
000006552 700__ $$aPlum, G.
000006552 700__ $$aPoggio, E.
000006552 700__ $$aPourbaix, D.
000006552 700__ $$aPrša, A.
000006552 700__ $$aPulone, L.
000006552 700__ $$aRacero, E.
000006552 700__ $$aRainer, M.
000006552 700__ $$aRaiteri, C. M.
000006552 700__ $$aRamos, P.
000006552 700__ $$aRamos-Lerate, M.
000006552 700__ $$aRatajczak, M.
000006552 700__ $$aRe Fiorentin, P.
000006552 700__ $$aRegibo, S.
000006552 700__ $$aReylé, C.
000006552 700__ $$aRipepi, V.
000006552 700__ $$aRiva, A.
000006552 700__ $$aRix, H. -W.
000006552 700__ $$aRixon, G.
000006552 700__ $$aRobichon, N.
000006552 700__ $$aRobin, C.
000006552 700__ $$aRomero-Gómez, M.
000006552 700__ $$aRowell, N.
000006552 700__ $$aRoyer, F.
000006552 700__ $$aRuz Mieres, D.
000006552 700__ $$aRybicki, K. A.
000006552 700__ $$aSadowski, G.
000006552 700__ $$aSáez Núñez, A.
000006552 700__ $$aSagristà Sellés, A.
000006552 700__ $$aSahlmann, J.
000006552 700__ $$aSanchez Gimenez, V.
000006552 700__ $$aSanna, N.
000006552 700__ $$aSantoveña, R.
000006552 700__ $$aSarasso, M.
000006552 700__ $$aSarrate Riera, C.
000006552 700__ $$aSciacca, E.
000006552 700__ $$aSegovia, J. C.
000006552 700__ $$aSégransan, D.
000006552 700__ $$aShahaf, S.
000006552 700__ $$aSiebert, A.
000006552 700__ $$aSiltala, L.
000006552 700__ $$aSlezak, E.
000006552 700__ $$aSmart, R. L.
000006552 700__ $$aSnaith, O. N.
000006552 700__ $$aSolano, E.
000006552 700__ $$aSolitro, F.
000006552 700__ $$aSouami, D.
000006552 700__ $$aSouchay, J.
000006552 700__ $$aSpina, L.
000006552 700__ $$aSpitoni, E.
000006552 700__ $$aSpoto, F.
000006552 700__ $$aSquillante, L. A.
000006552 700__ $$aSteele, I. A.
000006552 700__ $$aSteidelmüller, H.
000006552 700__ $$aSurdej, J.
000006552 700__ $$aSzabados, L.
000006552 700__ $$aTaris, F.
000006552 700__ $$aTaylor, M. B.
000006552 700__ $$aTeixeira, R.
000006552 700__ $$aTisanić, K.
000006552 700__ $$aTolomei, L.
000006552 700__ $$aTorra, F.
000006552 700__ $$aTorralba Elipe, G.
000006552 700__ $$aTrabucchi, M.
000006552 700__ $$aTsantaki, M.
000006552 700__ $$aUlla, A.
000006552 700__ $$aUnger, N.
000006552 700__ $$aVanel, O.
000006552 700__ $$aVecchiato, A.
000006552 700__ $$aVicente, D.
000006552 700__ $$aVoutsinas, S.
000006552 700__ $$aWeiler, M.
000006552 700__ $$aWyrzykowski, L.
000006552 700__ $$aZorec, J.
000006552 700__ $$aBalaguer-Núñez, L.
000006552 700__ $$aLeclerc, N.
000006552 700__ $$aMorgenthaler, S.
000006552 700__ $$aRobert, G.
000006552 700__ $$aZucker, S.
000006552 773__ $$cA38 (33pp)$$pAstronomy & Astrophysics$$v680$$y2023
000006552 8560_ $$fronny.blomme@ksb-orb.be
000006552 85642 $$ahttps://arxiv.org/abs/2310.06175
000006552 905__ $$apublished in
000006552 980__ $$aREFERD