dc.contributor.author | Sanders, Jason L. | |
dc.contributor.author | Smith, Leigh C. | |
dc.contributor.author | González-Fernández, Carlos | |
dc.contributor.author | Lucas, Philip | |
dc.contributor.author | Minniti, Dante | |
dc.date.accessioned | 2022-10-21T14:30:01Z | |
dc.date.available | 2022-10-21T14:30:01Z | |
dc.date.issued | 2022-08-01 | |
dc.identifier.citation | Sanders , J L , Smith , L C , González-Fernández , C , Lucas , P & Minniti , D 2022 , ' The extinction law in the inner 3 × 3 deg 2 of the Milky Way and the red clump absolute magnitude in the inner bar-bulge ' , Monthly Notices of the Royal Astronomical Society , vol. 514 , no. 2 , pp. 2407-2424 . https://doi.org/10.1093/mnras/stac1367 | |
dc.identifier.issn | 1365-2966 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/2205.10378v1 | |
dc.identifier.other | ORCID: /0000-0002-8872-4462/work/121257214 | |
dc.identifier.uri | http://hdl.handle.net/2299/25833 | |
dc.description | © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. This is the final published pdf, which was originally published at https://doi.org/10.1093/mnras/stac1367 | |
dc.description.abstract | The extinction law from 0.9 to 8 microns in the inner 3x3 deg^2 of the Milky Way is measured using data from VISTA Variables in the Via Lactea, GLIMPSE and WISE. Absolute extinction ratios are found by requiring that the observed red clump density peaks at the GRAVITY collaboration distance to the Galactic centre. When combined with selective extinction ratios measured from the bulge giant colour-colour diagrams, we find an extinction law of A_Z:A_Y:A_J:A_H:A_{K_s}:A_{W1}:A_{[3.6]}:A_{[4.5]}:A_{W2}:A_{[5.8]}:A_{[8.0]} =7.19(0.30):5.11(0.20):3.23(0.11):1.77(0.04):1:0.54(0.02):0.46(0.03):0.34(0.03):0.32(0.03):0.24(0.04):0.28(0.03) valid for low extinctions where non-linearities are unimportant. These results imply an extinction law from the Rayleigh Jeans colour excess method (RJCE) of A_{K_s}=0.677(H-[4.5]-0.188). We find little evidence for significant selective extinction ratio variation over the inspected region (around 5%). Assuming the absolute extinction ratios do not vary across the inspected region gives an independent measurement of the absolute K_s magnitude of the red clump at the Galactic Centre of (-1.61 +/- 0.07) mag. This is very similar to the value measured for solar neighbourhood red clump stars giving confidence in the use of red clump stars as standard candles across the Galaxy. As part of our analysis, we inspect the completeness of PSF photometry from the VVV survey using artificial star tests, finding 90% completeness at K_s ~16 (17) in high (low) density regions and good agreement with the number counts with respect to the GALACTICNUCLEUS and DECAPS catalogues over small regions of the survey. | en |
dc.format.extent | 18 | |
dc.format.extent | 3541633 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | astro-ph.GA | |
dc.subject | Stars: distances | |
dc.subject | Galaxy: bulge | |
dc.subject | Dust, extinction | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | The extinction law in the inner 3 × 3 deg 2of the Milky Way and the red clump absolute magnitude in the inner bar-bulge | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | Centre for Climate Change Research (C3R) | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85133695998&partnerID=8YFLogxK | |
rioxxterms.versionofrecord | 10.1093/mnras/stac1367 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |