Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Joachim Köppen"'
Autor:
Rhys Taylor, Joachim Köppen, Pavel Jáchym, Robert Minchin, Jan Palouš, Jessica L. Rosenberg, Stephen Schneider, Richard Wünsch, Boris Deshev
Using data from the Arecibo Galaxy Environment Survey, we report the discovery of five HI clouds in the Leo I group without detected optical counterparts. Three of the clouds are found midway between M96 and M95, one is only 10$^{\prime}$ from the so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adce1913662dd9e4855517100ff7ef92
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 479:4367-4390
The removal of gas by ram pressure stripping of galaxies is treated by a purely kinematic description. The solution has two asymptotic limits: if the duration of the ram pressure pulse exceeds the period of vertical oscillations perpendicular to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ea4bd04e816d351259d1c7f950cb0d0
https://doi.org/10.1093/mnras/sty1610
https://doi.org/10.1093/mnras/sty1610
Autor:
Miodrag Filipovic, Wolf Hautz, Urs Pietsch, Carina Graf, Christoph Alexander Rüst, Joachim Koppenberg, Juliane Kaemmer
Publikováno v:
BMJ Open Quality, Vol 13, Iss 2 (2024)
Importance Adequate situational awareness in patient care increases patient safety and quality of care. To improve situational awareness, an innovative, low-fidelity simulation method referred to as Room of Improvement, has proven effective in variou
Externí odkaz:
https://doaj.org/article/27b72253c8b94b248c2850733492b882
Autor:
Joachim Köppen, Olivia Keenan, Rhys Taylor, Jonathan Ivor Davies, Robert F. Minchin, Wim van Driel
Publikováno v:
The Astronomical Journal
The Astronomical Journal, American Astronomical Society, 2019, 158 (3), pp.121. ⟨10.3847/1538-3881/ab303e⟩
The Astronomical Journal, American Astronomical Society, 2019, 158 (3), pp.121. ⟨10.3847/1538-3881/ab303e⟩
We are carrying out a sensitive blind survey for neutral hydrogen (HI) in the Virgo cluster and report here on the first 5\deg\ x 1\deg\ area covered, which includes two optically-dark gas features: the five-cloud ALFALFA Virgo 7 complex (Kent et al.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9734ad91e2ead27bc07e251697859762
Publikováno v:
The Astronomical Journal. 159:218
Although many galaxies in the Virgo cluster are known to have lost significant amounts of HI gas, only about a dozen features are known where the HI extends significantly outside its parent galaxy. Previous numerical simulations have predicted that H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9c1a09898cdb1c5098a67659b9b7708
https://doi.org/10.3847/1538-3881/ab6988
https://doi.org/10.3847/1538-3881/ab6988
Autor:
Brent Miszalski, O. De Marco, Paul A. Crowther, Todd C. Hillwig, A. Acker, Joachim Köppen, Anthony F. J. Moffat
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 423:934-947
We report on the serendipitous discovery of the first central star of a planetary nebula (PN) that mimics the helium- and nitrogen-rich WN sequence of massive Wolf–Rayet (WR) stars. The central star of IC 4663 (PN G346.2−08.2) is dominated by bro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::986e81ceed879ea7ddd1dba245c3b611
https://doi.org/10.1111/j.1365-2966.2012.20929.x
https://doi.org/10.1111/j.1365-2966.2012.20929.x
Autor:
Joachim Köppen, Quentin A. Parker, David J. Frew, Brent Miszalski, Henri M. J. Boffin, A. Acker, Anthony F. J. Moffat
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 419:39-49
Abell 70 (PN G038.1-25.4, hereafter A 70) is a planetary nebula (PN) known for its diamond ring appearance due a superposition with a background galaxy. The previously unstudied central star is found to be a binary consisting of a G8IV-V secondary at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::116f556044be9b0162b84493f1bc08c0
https://doi.org/10.1111/j.1365-2966.2011.19667.x
https://doi.org/10.1111/j.1365-2966.2011.19667.x
Autor:
Peter M. Frinchaboy, Anna V. Kovacevic, Paul Dobbie, Quentin A. Parker, Brent Miszalski, Joachim Köppen, David J. Frew
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 413:1835-1844
We present a detailed study of a bipolar, possible Type I planetary nebula (PN), PHR1315-6555 (PN G305.3-03.1), that was discovered as part of the Macquarie/AAO/Strasbourg H-alpha planetary nebula project (MASH) and that we considered at the time was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::042b3cc07cf9a6d03d1be452ed108ef0
https://doi.org/10.1111/j.1365-2966.2011.18259.x
https://doi.org/10.1111/j.1365-2966.2011.18259.x
Autor:
M. Hartley, D. H. Morgan, Quentin A. Parker, M. J. Pierce, Agnès Acker, Alan E J Peyaud, F. Ochsenbein, Delphine Russeil, Joachim Köppen, Rhys Morris, Steven Phillipps, Martin Cohen, A. E. Vaughan, Brent Miszalski, Sylvie F. Beaulieu, David J. Frew
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 373:79-94
We present the Macquarie/AAO/Strasbourg Hα Planetary Nebula Catalogue (MASH) of over 900 true, likely and possible new Galactic planetary nebulae (PNe) discovered from the AAO/UKST Hα survey of the southern Galactic plane. The combination of depth,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9dea1606bee2454757fd07a09e14900e
https://doi.org/10.1111/j.1365-2966.2006.10950.x
https://doi.org/10.1111/j.1365-2966.2006.10950.x
Publikováno v:
Highlights of Astronomy. 13:554-559
Investigations have been performed to understand the age of dwarf irregular galaxies from the point of view of their presently low chemical abundances and the enhanced star-formation rate. While for a few objects, like e.g. I Zw 18, their assumed rel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::887b03d41b71c042e1a85d449be30239
https://doi.org/10.1017/s1539299600016579
https://doi.org/10.1017/s1539299600016579