| 1. |
- Hodapp, Klaus W., et al.
(författare)
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The New EXor Outburst of ESO-H alpha 99 Observed by Gaia ATLAS and TESS
- 2019
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Ingår i: Astronomical Journal. - : IOP PUBLISHING LTD. - 0004-6256 .- 1538-3881. ; 158:6
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Tidskriftsartikel (refereegranskat)abstract
- We report photometry and spectroscopy of the outburst of the young stellar object ESO-H?99. The outburst was first noticed in Gaia alert Gaia18dvc and later by the Asteroid Terrestrial-impact Last Alert System (ATLAS). We have established the outburst light curve with archival ATLAS orange filter photometry, Gaia data, new V-band photometry, and J, H, and K-s photometry from the Infrared Imaging System (IRIS) and the United Kingdom Infrared Telescope (UKIRT). The brightness has fluctuated several times near the light curve maximum. The Transiting Exoplanet Survey Satellite (TESS) satellite observed ESO-H99 with high cadence during one of these minor minima and found brightness fluctuations on timescales of days and hours. Imaging with UKIRT shows the outline of an outflow cavity, and we find one knot of emission, now named MHO 1520, on the symmetry axis of this nebula, indicating recent collimated outflow activity from ESO-H99. Its pre-outburst SED shows a flat far-infrared spectrum, confirming its early evolutionary state and its similarity to other deeply embedded objects in the broader EXor class. The pre-outburst luminosity is 34 L, a much higher luminosity than typical EXors, indicating that ESO-H alpha 99 may be a star of intermediate mass. Infrared and optical spectroscopy show a rich emission-line spectrum, including H i lines, strong red Ca ii emission, as well as infrared CO bandhead emission, all characteristic EXors in the broadest sense. Comparison of the present spectra with an optical spectrum obtained in 1993, presumably in the quiescent state of the object, shows that during the present outburst the continuum component of the spectrum has increased notably more than the emission lines. The H alpha equivalent width during the outburst is down to one-half of its 1993 level, and shock-excited emission lines are much less prominent.
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| 2. |
- Kono, N., et al.
(författare)
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Inverse internal conversion in C4- below the electron detachment threshold
- 2015
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Ingår i: Physical Chemistry Chemical Physics - PCCP. - : Royal Society of Chemistry (RSC). - 1463-9076 .- 1463-9084. ; 17:38, s. 24732-24737
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Tidskriftsartikel (refereegranskat)abstract
- Inverse internal conversion followed by recurrent fluorescence was observed as a fast decay (10 μs range) in the time profile of neutral yields from photo-excited C4- molecular ions. We also elucidated the contribution of such electronic radiative cooling to the C4- ions with internal energy far below the detachment threshold by an alternative novel approach, observing the laser wavelength and storage time dependence (ms range) of the total yield of the photo-induced neutrals.
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| 3. |
- Larsson, Lena Gunvor, et al.
(författare)
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A national study on collaboration in care planning for patients with complex needs
- 2019
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Ingår i: International Journal of Health Planning and Management. - : Wiley. - 0749-6753 .- 1099-1751. ; 34:1, s. E646-E660
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Tidskriftsartikel (refereegranskat)abstract
- INTRODUCTION: The purpose of this study was to investigate inter-organisational collaboration on care planning for patients with complex care needs. Internationally, and in Sweden where the data for this study was collected, difficulties in care planning and transition of patients between the main health care providers, hospitals, municipal care, and primary care are well known.METHOD: A survey of a total population of care managers in hospitals, municipalities, and primary care in Sweden was conducted. The study assessed accessibility, willingness, trustworthiness, and collaboration between health care providers. Data were analysed with descriptive statistics, bivariate, and multivariate regressions.RESULTS: The results indicate that Swedish health care providers show strong self-awareness, but they describe each other's ability to collaborate as weak. Primary care stands out, displaying the highest discrepancy between self-awareness and displayed accessibility, willingness, trustworthiness, and collaboration.CONCLUSION: Inability to collaborate in patient care planning may be due to shortcomings in terms of trust between caregivers in the health care organisation at a national level. Organisations that experience difficulties in collaboration tend to defend themselves with arguments about their own excellence and insufficiency of others.
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| 4. |
- Larsson, Lena Gunvor, et al.
(författare)
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Primary care managers’ perceptions of their capability in providing care planning to patients with complex needs
- 2017
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Ingår i: Health Policy. - : Elsevier BV. - 0168-8510 .- 1872-6054. ; 121:1, s. 58-65
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to investigate primary care managers’ perceptions of their capability in providing care planning to patients with complex needs. Care planning is defined as a process where the patient, family and health professionals engage in dialogue about the patient's care needs and plan care interventions together. Methods Semi-structured interviews with 18 primary care managers in western Sweden were conducted using Westrin's theoretical cooperation model. Data were analysed using a qualitative deductive method. Main findings Results reveal that the managers’ approach to care planning was dominated by non-cooperation and separation. The managers were permeated by uncertainty about the meaning of the task of care planning as such. They did not seem to be familiar with the national legislation stipulating that every healthcare provider must meet patients’ need for care interventions and participate in the care planning. Implications for practice To accomplish care planning, the process needs to cross – and overcome – both professional and organisational boundaries. There is also a need for incentives to develop working methods that promote local cooperation in order to facilitate optimal care for patients with complex needs.
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| 5. |
- Najafian, Kaveh, et al.
(författare)
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Radiative cooling of C7-
- 2014
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Ingår i: Journal of Chemical Physics. - : AIP Publishing. - 0021-9606 .- 1089-7690. ; 140:10
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Tidskriftsartikel (refereegranskat)abstract
- The spontaneous and photo-induced neutralization of C_7- produced in a laser ablation source was measured in an electrostatic storage ring. The measurements provide three independent determinations of the radiative cooling of the ions, based on the short time spontaneous decay and on the integrated amplitude and the shape of the photo-induced neutralization signal. The amplitude of the photo-induced signal was measured between 0.5 ms and 35 ms and found to depend on photon wavelength and ion storage time. All three signals can be reproduced with identical thermal IR radiative cooling rates with oscillator strengths equal to theoretical predictions. In addition, the measurements provide the excitation energy distribution.
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| 6. |
- Pettersson, Bertil, 1945-, et al.
(författare)
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Hα emission-line stars in molecular clouds : II. The M42 region
- 2014
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 570
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Tidskriftsartikel (refereegranskat)abstract
- We present a deep survey of Hα emission-line stars in the M 42 region using wide-field objective prism films. A total of 1699 Hαemission-line stars were identified, of which 1025 were previously unknown, within an area of 5.̊5 × 5.̊5 centred on the Trapezium Cluster. We present Hα strength estimates, positions, and JHKs photometry extracted from 2MASS, and comparisons to previous surveys. The spatial distribution of the bulk of the stars follows the molecular cloud as seen in CO and these stars are likely to belong to the very young population of stars associated with the Orion Nebula Cluster. Additionally, there is a scattered population of Hα emission-line stars distributed all over the region surveyed, which may consist partly of foreground stars associated with the young NGC 1980 cluster, as well as some foreground and background dMe or Be stars. The present catalogue adds a large number of candidate low-mass young stars belonging to the Orion population, selected independently of their infrared excess or X-ray emission.
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| 7. |
- Pettersson, Bertil, 1945-, et al.
(författare)
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Hα emission-line stars in molecular clouds : III. Canis Major
- 2019
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 630
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Tidskriftsartikel (refereegranskat)abstract
- A deep objective-prism survey for Hα emission stars towards the Canis Major star-forming clouds was performed. A total of 398 Hα emitters were detected, 353 of which are new detections. There is a strong concentration of these Hα emitters towards the molecular clouds surrounding the CMa OB1 association, and it is likely that these stars are young stellar objects recently born in the clouds. An additional population of Hα emitters is scattered all across the region, and probably includes unrelated foreground dMe stars and background Be stars. About 90% of the Hα emitters are detected by WISE, of which 75% was detected with usable photometry. When plotted in a WISE colour–colour diagram it appears that the majority are Class II YSOs. Coordinates and finding charts are provided for all the new stars, and coordinates for all the detections. We searched the Gaia-DR2 catalogue and from 334 Hα emission stars with useful parallaxes, we selected a subset of 98 stars that have parallax errors of less than 20% and nominal distances in the interval 1050 to 1350 pc that surrounds a strong peak at 1185 pc in the distance distribution. Similarly, Gaia distances were obtained for 51 OB-stars located towards Canis Major and selected with the same parallax errors as the Hα stars. We find a median distance for the OB stars of 1182 pc, in excellent correspondence with the distance from the Hα stars. Two known runaway stars are confirmed as members of the association. Finally, two new Herbig-Haro objects are identified.
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| 8. |
- Shiromaru, H., et al.
(författare)
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Cooling dynamics of carbon cluster anions
- 2015
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Ingår i: Journal of Physics: Conference Series. - : IOP Publishing. - 1742-6596 .- 1742-6588. ; 635
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Tidskriftsartikel (refereegranskat)abstract
- A series of ion storage experiments on small carbon cluster anions was conducted to understand size-dependent cooling processes. The laser-induced delayed electron detachment time profile show clear even/odd alternation due to the presence of the electronic cooling. The time evolution of the internal energy distribution was simulated for Cn- (n=4 to 7) with a common procedure taking vibrational and electronic cooling into account.
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