Zobrazeno 1 - 10
of 1 116
pro vyhledávání: '"Humphreys, E"'
Autor:
Kuo, C. Y., Gao, F., Braatz, J. A., Pesce, D. W., Humphreys, E. M. L., Reid, M. J., Impellizzeri, C. M. V., Henkel, C., Wagner, J., Wu, C. E.
High precision mapping of H2O megamaser emission from active galaxies has revealed more than a dozen Keplerian H2O maser disks, which enable a ~4% uncertainty estimate of the Hubble constant as well as providing accurate masses for the central black
Externí odkaz:
http://arxiv.org/abs/2312.16382
Autor:
Unnikrishnan, R., De Beck, E., Nyman, L. A., Olofsson, H., Vlemmings, W. H. T., Tafoya, D., Maercker, M., Charnley, S. B., Cordiner, M. A., de Gregorio, I., Humphreys, E., Millar, T. J., Rawlings, M. G.
AGB stars are major contributors to the chemical enrichment of the ISM through nucleosynthesis and extensive mass loss. Most of our current knowledge of AGB atmospheric and circumstellar chemistry, in particular in a C-rich environment, is based on o
Externí odkaz:
http://arxiv.org/abs/2312.10014
Autor:
Garufi, A., Podio, L., Codella, C., Segura-Cox, D., Donckt, M. Vander, Mercimek, S., Bacciotti, F., Fedele, D., Kasper, M., Pineda, J. E., Humphreys, E., Testi, L.
Publikováno v:
A&A 658, A104 (2022)
Planet-forming disks are not isolated systems. Their interaction with the surrounding medium affects their mass budget and chemical content. In the context of the ALMA-DOT program, we obtained high-resolution maps of assorted lines from six disks tha
Externí odkaz:
http://arxiv.org/abs/2110.13820
Autor:
Cotton, W. D., Humphreys, E., Wittkowski, M., Baudry, A., Richards, A. M. S., Vlemmings, W., Khouri, T., Etoka, S.
Interactions between AGB stars and a secondary in a close orbit are one possible explanation of why some AGB stars develop into aspherical planetary nebulae. This study uses millimeter observations of the continuum and SiO maser emission in several s
Externí odkaz:
http://arxiv.org/abs/2107.09567
Autor:
Olofsson, H., Black, J. H., Khouri, T., Vlemmings, W. H. T., Humphreys, E. M. L., Lindqvist, M., Maercker, M., Nyman, L., Ramstedt, S., Tafoya, D.
We report the detection of two lines at millimetre wavelengths towards the immediate surroundings of the post-giant and most likely post-common-envelope star HD101584 using high-angular-resolution ALMA observations. The circumstellar environment of t
Externí odkaz:
http://arxiv.org/abs/2105.00699
Publikováno v:
A&A 650, A37 (2021)
We observed the X-ray binaries CirX-1, ScoX-1, GRS 1915+105, GX13+1, and CygX-1 with the Atacama Large Millimeter/submillimeter Array (ALMA). Unresolved continuum emission is found at the positions of all the sources at a frequency of 92 GHz, with fl
Externí odkaz:
http://arxiv.org/abs/2104.05384
Publikováno v:
A&A 646, A178 (2021)
In this paper we present the detection of H2O and OH+ emission in z>3 hot dust-obscured galaxies (Hot DOGs). Using ALMA Band-6 observations of two Hot DOGs, we have detected H2O(2_02-1_11) in W0149+2350, and H2O(3_12-3_03) and the multiplet OH+(1_1-0
Externí odkaz:
http://arxiv.org/abs/2011.09991
Autor:
Kluska, J., Olofsson, H., Van Winckel, H., Khouri, T., Wittkowski, M., de Wit, W. J., Humphreys, E. M. L., Lindqvist, M., Maercker, M., Ramstedt, S., Tafoya, D., Vlemmings, W. H. T.
Publikováno v:
A&A 642, A152 (2020)
Context: The observed orbital characteristics of post-asymptotic giant branch (post-AGB) and post-red giant branch (post-RGB) binaries are not understood. We suspect that the missing ingredients to explain them probably lie in the continuous interact
Externí odkaz:
http://arxiv.org/abs/2008.11555
Autor:
Bergman, P., Humphreys, E. M. L.
Here we aim to characterise submillimetre water masers at 437, 439, 471, and 474 GHz towards a sample of evolved stars. We used the Atacama Pathfinder Experiment (APEX) to observe submillimetre water transitions and the CO (4-3) line towards 11 evolv
Externí odkaz:
http://arxiv.org/abs/2005.12624
Autor:
Vlemmings, W. H. T., Lankhaar, B., Cazzoletti, P., Ceccobello, C., Dall'Olio, D., van Dishoeck, E. F., Facchini, S., Humphreys, E. M. L., Persson, M. V., Testi, L., Williams, J. P.
Despite their importance in the star formation process, measurements of magnetic field strength in proto-planetary discs remain rare. While linear polarisation of dust and molecular lines can give insight into the magnetic field structure, only obser
Externí odkaz:
http://arxiv.org/abs/1904.01632