Galaxie M 101

Marx, Siegfried; Pfau, W.

doi:10.1007/978-3-642-74966-7_38

Cited by 6 publications

(7 citation statements)

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“…The density of stars in the centre of a well developed galaxy is around 10 2 M /pc 3 in a region of 100 pc in radius and is comparable to what is found in globular cluster (Marx & Pfau 1992). These dense regions allow stellar encounters to create new gravitationally bound systems or ejections (Davies & Benz 1995).…”

Section: Tidal Events Frequencymentioning

confidence: 59%

Tidal disruption of a super-Jupiter by a massive black hole

Nikołajuk

Walter

2013

A&A

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Aims. A strong, hard X-ray flare was discovered (IGR J12580+0134) by INTEGRAL in 2011, and is associated to NGC 4845, a Seyfert 2 galaxy never detected at high-energy previously. To understand what happened we observed this event in the X-ray band on several occasions. Methods. Follow-up observations with XMM-Newton, Swift, and MAXI are presented together with the INTEGRAL data. Long and short term variability are analysed and the event wide band spectral shape modelled.Results. The spectrum of the source can be described with an absorbed (N H ∼ 7 × 10 22 cm −2 ) power law (Γ 2.2), characteristic of an accreting source, plus a soft X-ray excess, likely to be of diffuse nature. The hard X-ray flux increased to maximum in a few weeks and decreased over a year, with the evolution expected for a tidal disruption event. The fast variations observed near the flare maximum allowed us to estimate the mass of the central black hole in NGC 4845 as ∼3 × 10 5 M . The observed flare corresponds to the disruption of about 10% of an object with a mass of 14-30 Jupiter. The hard X-ray emission should come from a corona forming around the accretion flow close to the black hole. This is the first tidal event where such a corona has been observed.

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Section: Tidal Events Frequencymentioning

confidence: 59%

Tidal disruption of a super-Jupiter by a massive black hole

Nikołajuk

Walter

2013

A&A

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“…Neural plasticity mediated by PSA may also be influenced by the strength of axon-axon and axon-environment interactions in adult life (63). In the adult hippocampus, chronic stress as well as treatment with glucocorticoid stress hormones alters hippocampal PSA and NCAM expression with associated changes in neural plasticity involving mossy fiber terminals and CA3 pyramidal cells (64 -66).…”

Section: Discussionmentioning

confidence: 99%

Sialyltransferase ST8Sia-II Assembles a Subset of Polysialic Acid That Directs Hippocampal Axonal Targeting and Promotes Fear Behavior

Angata

Long

Bukalo

et al. 2004

Journal of Biological Chemistry

170

154

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“…We also observed dense sialylation along the entire length of the floor plate, which is known to express the neural cell adhesion molecule, a developmentally important protein that displays polysialic acid ( Figure 3E). [27] Also notable was the bright labeling along the intermyotomal boundaries as well as on the surface of muscle fiber cells in the myotomes, which also express St8SiaIII ( Figure 3F). [26] In addition to these structures that we had expected to be sialylated, we observed several novel sialylation patterns.…”

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confidence: 99%

Systemic Fluorescence Imaging of Zebrafish Glycans with Bioorthogonal Chemistry

et al. 2015

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Vertebrate glycans constitute a large, important, and dynamic set of post-translational modifications that are notoriously difficult to manipulate and image. Although the chemical reporter strategy has been used in conjunction with bioorthogonal chemistry to image the external glycosylation state of live zebrafish and detect tumor-associated glycans in mice, the ability to image glycans systemically within a live organism has remained elusive. Here, we report a method that combines the metabolic incorporation of a cyclooctyne-functionalized sialic acid derivative with a ligation reaction of a fluorogenic tetrazine, allowing for the imaging of sialylated glycoconjugates within live zebrafish embryos.

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Galaxie M 101

Cited by 6 publications

References 0 publications

Tidal disruption of a super-Jupiter by a massive black hole

Tidal disruption of a super-Jupiter by a massive black hole

Sialyltransferase ST8Sia-II Assembles a Subset of Polysialic Acid That Directs Hippocampal Axonal Targeting and Promotes Fear Behavior

Systemic Fluorescence Imaging of Zebrafish Glycans with Bioorthogonal Chemistry

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