Meri Lindqvist

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DNA extracted from historical samples is an important resource for understanding genetic consequences of anthropogenic influences and long-term environmental change. However, such samples generally yield DNA of a lower amount and quality, and the extent to which DNA degradation affects SNP genotyping success and allele frequency estimation is not well(More)
The nature of the mechanism responsible for producing the spectacular, geometrically thin, spherical shells found around some carbon stars has been an enigma for some time. Based on extensive radiative transfer modelling of both CO line emission and dust continuum radiation for all objects with known detached molecular shells, we present compelling evidence(More)
We have observed four carbon stars (W Ori, RW LMi [CIT6], Y CVn, and LP And [IRC+40540]) in the HCN(J = 1 → 0) line and three of them (RW LMi, Y CVn, and LP And) also in the CN(N = 1 → 0) line using the IRAM interferometer on Plateau de Bure. The HCN brightness distributions are centred on the stellar positions suggesting a photospheric origin of this(More)
The asymptotic-giant-branch star R Sculptoris is surrounded by a detached shell of dust and gas. The shell originates from a thermal pulse during which the star underwent a brief period of increased mass loss. It has hitherto been impossible to constrain observationally the timescales and mass-loss properties during and after a thermal pulse--parameters(More)
A genotyping assay for the Ion Torrent Ion PGM platform was developed for fast and cost-effective targeted genotyping of key single nucleotide polymorphisms (SNPs) earlier identified using a genome-wide SNP array in Atlantic salmon Salmo salar. The method comprised a simple primer design step for multiplex-polymerase chain reaction (PCR), followed by two(More)
We present radio-interferometric observations of HCN J = 1 → 0 line emission from the carbon star R Scl, obtained with the interim 3-mm receivers of the Australia Telescope Compact Array. The emission is resolved into a central source with a Gaussian FWHM of ∼1, which we identify as the present mass loss envelope. Using a simple photodissociation model and(More)
The Odin satellite has been used to detect emission and absorption in the 557-GHz H16 2 O line in the Galactic Centre towards the Sgr A Circumnuclear Disk (CND), and the Sgr A +20 km s−1 and +50 km s−1 molecular clouds. Strong broad H2O emission lines have been detected in all three objects. Narrow H2O absorption lines are present at all three positions and(More)
We report IRAM Plateau de Bure interferometer observations of the carbon star U Cam in the CO(J = 1 → 0) and CO(J = 2 → 1) lines. The remarkable images show that U Cam is surrounded by a geometrically thin, ∼1016 cm, shell of gas at a distance of ∼6×1016 cm from the star, that expands with a velocity of ∼23 km s−1. The estimated mass of the shell is low,(More)
Aims. We study the circumstellar evolution of the binary HD 101584, consisting of a post-AGB star and a low-mass companion, which is most likely a post-common-envelope-evolution system. Methods. We used ALMA observations of the 12CO, 13CO, and C18O J = 2−1 lines and the 1.3 mm continuum to determine the morphology, kinematics, masses, and energetics of the(More)