Zobrazeno 1 - 10
of 224
pro vyhledávání: '"Cox, N. L. J."'
The carbonaceous macromolecules imprinting in astronomical spectra the numerous absorptions called Diffuse Interstellar Bands (DIBs) are omnipresent in the Galaxy and beyond and represent a considerable reservoir of organic matter. However, their che
Externí odkaz:
http://arxiv.org/abs/2406.00807
Autor:
Ebenbichler, A., Smoker, J. V., Lallement, R., Farhang, A., Cox, N. L. J., Joblin, C., van Loon, J. Th., Linnartz, H., Przybilla, N., Ehrenfreund, P., Cami, J., Cordiner, M.
Context: There have been many attempts to identify families of diffuse interstellar bands (DIBs) with perfectly correlating band strengths. Although major efforts have been made to classify broadly based DIB families and important insights have been
Externí odkaz:
http://arxiv.org/abs/2403.00547
Autor:
Smoker, J. V., Müller, A., Ibero, A. Monreal, Elyajouri, M., Evans, C. J., Najarro, F., Farhang, A., Cox, N. L. J., Minniti, J., Smith, K. T., Pritchard, J., Lallement, R., Smette, A., Boffin, H. M. J., Cordiner, M., Cami, J.
Publikováno v:
A&A 672, A181 (2023)
Diffuse interstellar bands comprise hundreds of absorption features in the ISM. Most DIBs are observed in the optical, but some are in the IR. We observed 76 early-type stars at R=50,000 and S/N ratios of several hundreds using CRIRES. We measure DIB
Externí odkaz:
http://arxiv.org/abs/2212.03563
Publikováno v:
A&A 664, A174 (2022)
3D maps of the extinction density in the Galaxy can be built through the inversion of catalogues of distance-extinction pairs for individual target stars. The spatial resolution of the maps that can be achieved increases with the spatial density of t
Externí odkaz:
http://arxiv.org/abs/2205.09087
Publikováno v:
A&A 661, A147 (2022)
Three-dimensional (3D) maps of Galactic interstellar dust are a tool for a wide range of uses. We aim to construct 3D maps of dust extinction in the Local Arm and surrounding regions. Gaia EDR3 photometric data were combined with 2MASS measurements t
Externí odkaz:
http://arxiv.org/abs/2203.01627
Autor:
Koumpia, E., Oudmaijer, R. D., Graham, V., Banyard, G., Black, J. H., Wichittanakom, C., Ababakr, K. M., de Wit, W. -J., Millour, F., Lagadec, E., Muller, S., Cox, N. L. J., Zijlstra, A., van Winckel, H., Hillen, M., Szczerba, R., Vink, J. S., Wallstrom, S. H. J.
Publikováno v:
A&A 635, A183 (2020)
Context. The fate of a massive star during the latest stages of its evolution is highly dependent on its mass-loss rate/geometry and therefore knowing the geometry of the circumstellar material close to the star and its surroundings is crucial. Aims.
Externí odkaz:
http://arxiv.org/abs/2002.02499
Autor:
Cordiner, M. A., Linnartz, H., Cox, N. L. J., Cami, J., Najarro, F., Proffitt, C. R., Lallement, R., Ehrenfreund, P., Foing, B. H., Gull, T. R., Sarre, P. J., Charnley, S. B.
Recent advances in laboratory spectroscopy lead to the claim of ionized Buckminsterfullerene (C60+) as the carrier of two diffuse interstellar bands (DIBs) in the near-infrared. However, irrefutable identification of interstellar C60+ requires a matc
Externí odkaz:
http://arxiv.org/abs/1904.08821
Autor:
Wade, G. A., Smoker, J. V., Evans, C. J., Howarth, I. D., Barba, R., Cox, N. L. J., Morrell, N., Nazé, Y., Cami, J., Farhang, A., Walborn, N. R., Arias, J., Gamen, R.
Publikováno v:
MNRAS, 483, 2581-2591 (2019)
We report new spectroscopic observations of the magnetic Of?p star HD 148937 obtained since 2015 that differ qualitatively from its extensive historical record of weak, periodic spectral variations. This remarkable behaviour represents clear evidence
Externí odkaz:
http://arxiv.org/abs/1811.11153
Publikováno v:
A&A 620, A52 (2018)
Diffuse interstellar bands (DIBs) are broad absorption features measured in sightlines probing the diffuse interstellar medium. Although large carbon-bearing molecules have been proposed as the carriers producing DIBs, their identity remains unknown.
Externí odkaz:
http://arxiv.org/abs/1808.10226
Autor:
Elyajouri, M., Lallement, R., Cox, N. L. J., Cami, J., Cordiner, M. A., Smoker, J. V., Fahrang, A., Sarre, P. J., Linnartz, H.
Publikováno v:
A&A 616, A143 (2018)
The so-called C2-DIBs are a class of very weak bands that fall in the blue part of the optical spectrum and are associated with high column densities of the C2 molecule. DIB profile structures constrain potential molecular carriers, but their measure
Externí odkaz:
http://arxiv.org/abs/1805.11566