Gaia Data Release 3: Exploring and mapping the diffuse interstellar band at 862 nm

collaboration, Gaia; Schultheis, M.; Zhao, H.; Zwitter, T.; Marshall, D. J.; Drimmel, R.; Frémat, Y.; Bailer-Jones, C. A. L.; Recio-Blanco, A.; Kordopatis, G.; Laverny, P. de; Andrae, R.; Dharmawardena, T. E.; Fouesneau, M.; Sordo, R.

doi:10.48550/arxiv.2206.05536

Cited by 2 publications

(4 citation statements)

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“…This value is slightly larger than previous results (e.g. Munari et al 2008 ;Kos et al 2013 ;Krełowski et al 2019 ) but between the v alues deri ved from Gaia -DR3 DIB results with different E( B − V ) sources (see table 3 in Gaia collaboration, Schultheis et al 2022 ).…”

Section: Ac K N Ow L E D G E M E N T Scontrasting

confidence: 56%

“…1 relative to E( B − V ) is also within the regions, considering the scatter, shown in Fig. 8 in Gaia collaboration, Schultheis et al ( 2022 ).…”

Section: Ac K N Ow L E D G E M E N T Smentioning

confidence: 83%

“…The 3D distributions of the DIB carriers have been mapped by Kos et al ( 2014 ) and Gaia collaboration, Schultheis et al ( 2022 ) for DIB λ862.1 (we take here its central wavelength as 862.086 nm derived in Gaia collaboration, Schultheis et al 2022 with measurements from Gaia collaboration, Recio-Blanco et al 2022 ), andZasowski et al ( 2015 ) for DIB λ1527.3, based on the data from the Radial Velocity Experiment (RAVE; Steinmetz et al 2006 ), Gaia -DR3 (Gaia Collaboration, Vallenari et al 2022 ;Gaia collaboration, Creev e y et al 2022 ), and the Apache Point Observatory Galactic Evolution Experiment (APOGEE; Majewski et al 2017 ), respectively. Zasowski et al ( 2015 ), Zhao et al ( 2021b ), and Gaia collaboration, Schultheis et al ( 2022 ) made preliminary studies on the kinematics of the DIB carriers with the APOGEE, Gaia -ESO (Gilmore et al 2012 ), and Gaia data sets. Nevertheless, the individual spectra in large spectroscopic surv e ys usually have less integral time than specifically designed DIB observations, resulting in a lower signal-to-noise ratio (S / N).…”

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confidence: 99%

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The Pristine Inner Galaxy Survey (PIGS) – VI. Different vertical distributions between two DIBs at 442.8 nm and 862.1 nm

Zhao

Schultheis

Arentsen

et al. 2022

Monthly Notices of the Royal Astronomical Society

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Although diffuse interstellar bands (DIBs) were discovered over 100 years ago, for most of them, their origins are still unknown. Investigation on the correlations between different DIBs is an important way to study the behavior and distributions of their carriers. Based on stacking thousands of spectra from the Pristine Inner Galaxy Survey, we study the correlations between two DIBs at 442.8 nm (λ442.8) and 862.1 nm (λ862.1), as well as the dust grains, in a range of latitude spanning ∼22○ (4○ < |b| < 15○) toward the Galactic center (|ℓ| < 11○). Tight linear intensity correlations can be found between λ442.8, λ862.1, and dust grains for |b| < 12○ or E(B − V) > 0.3 mag. For |b| > 12○, λ442.8 and λ862.1 present larger relative strength with respect to the dust grains. A systematic variation of the relative strength between λ442.8 and λ862.1 with |b| and E(B − V) concludes that the two DIBs do not share a common carrier. Furthermore, the carrier of λ862.1 is more abundant at high latitudes than that of λ442.8. This work can be treated as an example showing the significance and potentials to the DIB research covering a large latitude range.

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Section: Ac K N Ow L E D G E M E N T Scontrasting

confidence: 56%

“…1 relative to E( B − V ) is also within the regions, considering the scatter, shown in Fig. 8 in Gaia collaboration, Schultheis et al ( 2022 ).…”

Section: Ac K N Ow L E D G E M E N T Smentioning

confidence: 83%

mentioning

confidence: 99%

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The Pristine Inner Galaxy Survey (PIGS) – VI. Different vertical distributions between two DIBs at 442.8 nm and 862.1 nm

Zhao

Schultheis

Arentsen

et al. 2022

Monthly Notices of the Royal Astronomical Society

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“…The left plot of Fig. 13 compares the reddening E(G BP − G RP ) derived in our work, with the equivalent widths of the diffuse interstellar band at ∼ 862 nm, as derived in Gaia Collaboration, Schultheis et al (2022). The right plot is a comparison with the Schlegel et al (1998) E(B −V ) reddening (corrected as described in Sect.…”

Section: Calculation Of the Reddening And The Extinctionmentioning

confidence: 67%

Stellar ages, masses, extinctions, and orbital parameters based on spectroscopic parameters of Gaia DR3

Kordopatis

Schultheis

McMillan

et al. 2023

A&A

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Context. Gaia's third data release provides radial velocities for 33 million stars and spectroscopically derived atmospheric parameters for more than 5 million targets. When combined with the astrometric data, these allow us to derive orbital and stellar parameters that are key to understanding the stellar populations of the Milky Way and to perform Galactic archaeology. Aims. We used the calibrated atmospheric parameters, 2MASS and Gaia-EDR3 photometry, and parallax-based distances to compute the ages, initial stellar masses, and reddenings for the stars with spectroscopic parameters. We also derived the orbits for all of the stars with measured radial velocities and astrometry, adopting two sets of line-of-sight distances from the literature. Methods. Four different sets of ages, masses, and absolute magnitudes in different photometric bands are obtained through an isochrone fitting method, considering different combinations of input parameters. The reddenings are obtained by comparing the observed colours with those obtained from the isochrone projection. Finally, the orbits are computed adopting an axisymmetric potential of the Galaxy. Results. Comparisons with reference catalogues of field and cluster stars suggest that reliable ages are obtained for stars younger than 9-10 Gyr when the estimated relative age uncertainty is < 50 per cent. For older stars, ages tend to be underestimated. The most reliable stellar type for age determination are turn-off stars, even when the input atmospheric parameters have large uncertainties. Ages for giants and main-sequence stars are retrieved with uncertainties of the order of 2 Gyr when extinction towards the star's line of sight is less than AV 2.5 mag. Conclusions. The catalogue of ages, initial stellar masses, reddenings, galactocentric positions and velocities, as well as the stellar orbital actions, eccentricities, apocentre, pericentre and maximum distance from the Galactic plane reached during their orbits, is made publicly available to be downloaded. With this catalogue, the full chemo-dynamical properties of the extended solar neighbourhood unfold and allow us to better identify the properties of the spiral arms, to parametrise the dynamical heating of the disc, and to thoroughly study the chemical enrichment of the Milky Way.

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Gaia Data Release 3: Exploring and mapping the diffuse interstellar band at 862 nm

Cited by 2 publications

References 0 publications

The Pristine Inner Galaxy Survey (PIGS) – VI. Different vertical distributions between two DIBs at 442.8 nm and 862.1 nm

The Pristine Inner Galaxy Survey (PIGS) – VI. Different vertical distributions between two DIBs at 442.8 nm and 862.1 nm

Stellar ages, masses, extinctions, and orbital parameters based on spectroscopic parameters of Gaia DR3

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