1. Supernovae. ⁴⁴Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion.

    Science 348(6235):670 (2015) PMID 25954004

    In core-collapse supernovae, titanium-44 ((44)Ti) is produced in the innermost ejecta, in the layer of material directly on top of the newly formed compact object. As such, it provides a direct probe of the supernova engine. Observations of supernova 1987A (SN1987A) have resolved the 67.87- and ...
  2. Galaxy evolution. Black hole feedback in the luminous quasar PDS 456.

    Science 347(6224):860 (2015) PMID 25700515

    The evolution of galaxies is connected to the growth of supermassive black holes in their centers. During the quasar phase, a huge luminosity is released as matter falls onto the black hole, and radiation-driven winds can transfer most of this energy back to the host galaxy. Over five different ...
  3. Black hole feedback in the luminous quasar PDS 456.

    Science 347(6224):860 (2015) PMID 25700515

    The evolution of galaxies is connected to the growth of supermassive black holes in their centers. During the quasar phase, a huge luminosity is released as matter falls onto the black hole, and radiation-driven winds can transfer most of this energy back to the host galaxy. Over five different ...
  4. Black hole feedback in the luminous quasar PDS 456.

    Science 347(6224):860 (2015) PMID 25700515

    The evolution of galaxies is connected to the growth of supermassive black holes in their centers. During the quasar phase, a huge luminosity is released as matter falls onto the black hole, and radiation-driven winds can transfer most of this energy back to the host galaxy. Over five different ...
  5. An ultraluminous X-ray source powered by an accreting neutron star.

    Nature 514(7521):202 (2014) PMID 25297433

    The majority of ultraluminous X-ray sources are point sources that are spatially offset from the nuclei of nearby galaxies and whose X-ray luminosities exceed the theoretical maximum for spherical infall (the Eddington limit) onto stellar-mass black holes. Their X-ray luminosities in the 0.5-10 ...
  6. An ultraluminous X-ray source powered by an accreting neutron star.

    Nature 514(7521):202 (2014) PMID 25297433

    The majority of ultraluminous X-ray sources are point sources that are spatially offset from the nuclei of nearby galaxies and whose X-ray luminosities exceed the theoretical maximum for spherical infall (the Eddington limit) onto stellar-mass black holes. Their X-ray luminosities in the 0.5-10 ...
  7. Active galaxies. A fast and long-lived outflow from the supermassive black hole in NGC 5548.

    Science 345(6192):64 (2014) PMID 24994647

    Supermassive black holes in the nuclei of active galaxies expel large amounts of matter through powerful winds of ionized gas. The archetypal active galaxy NGC 5548 has been studied for decades, and high-resolution x-ray and ultraviolet (UV) observations have previously shown a persistent ionize...
  8. Active galaxies. A fast and long-lived outflow from the supermassive black hole in NGC 5548.

    Science 345(6192):64 (2014) PMID 24994647

    Supermassive black holes in the nuclei of active galaxies expel large amounts of matter through powerful winds of ionized gas. The archetypal active galaxy NGC 5548 has been studied for decades, and high-resolution x-ray and ultraviolet (UV) observations have previously shown a persistent ionize...
  9. Asymmetries in core-collapse supernovae from maps of radioactive 44Ti in Cassiopeia A.

    Nature 506(7488):339 (2014) PMID 24553239

    Asymmetry is required by most numerical simulations of stellar core-collapse explosions, but the form it takes differs significantly among models. The spatial distribution of radioactive (44)Ti, synthesized in an exploding star near the boundary between material falling back onto the collapsing ...
  10. Asymmetries in core-collapse supernovae from maps of radioactive 44Ti in Cassiopeia A.

    Nature 506(7488):339 (2014) PMID 24553239

    Asymmetry is required by most numerical simulations of stellar core-collapse explosions, but the form it takes differs significantly among models. The spatial distribution of radioactive (44)Ti, synthesized in an exploding star near the boundary between material falling back onto the collapsing ...
  11. A rapidly spinning supermassive black hole at the centre of NGC 1365.

    Nature 494(7438):449 (2013) PMID 23446416

    Broad X-ray emission lines from neutral and partially ionized iron observed in active galaxies have been interpreted as fluorescence produced by the reflection of hard X-rays off the inner edge of an accretion disk. In this model, line broadening and distortion result from rapid rotation and rel...
  12. A rapidly spinning supermassive black hole at the centre of NGC 1365.

    Nature 494(7438):449 (2013) PMID 23446416

    Broad X-ray emission lines from neutral and partially ionized iron observed in active galaxies have been interpreted as fluorescence produced by the reflection of hard X-rays off the inner edge of an accretion disk. In this model, line broadening and distortion result from rapid rotation and rel...
  13. A photometric redshift of z = 6.39 +/- 0.12 for GRB 050904.

    Nature 440(7081):181 (2006) PMID 16525465

    Gamma-ray bursts (GRBs) and their afterglows are the most brilliant transient events in the Universe. Both the bursts themselves and their afterglows have been predicted to be visible out to redshifts of z approximately 20, and therefore to be powerful probes of the early Universe. The burst GRB...
  14. A photometric redshift of z = 6.39 +/- 0.12 for GRB 050904.

    Nature 440(7081):181 (2006) PMID 16525465

    Gamma-ray bursts (GRBs) and their afterglows are the most brilliant transient events in the Universe. Both the bursts themselves and their afterglows have been predicted to be visible out to redshifts of z approximately 20, and therefore to be powerful probes of the early Universe. The burst GRB...
  15. The afterglow and elliptical host galaxy of the short gamma-ray burst GRB 050724.

    Nature 438(7070):988 (2005) PMID 16355217

    Despite a rich phenomenology, gamma-ray bursts (GRBs) are divided into two classes based on their duration and spectral hardness--the long-soft and the short-hard bursts. The discovery of afterglow emission from long GRBs was a watershed event, pinpointing their origin to star-forming galaxies, ...
  16. The afterglow and elliptical host galaxy of the short gamma-ray burst GRB 050724.

    Nature 438(7070):988 (2005) PMID 16355217

    Despite a rich phenomenology, gamma-ray bursts (GRBs) are divided into two classes based on their duration and spectral hardness--the long-soft and the short-hard bursts. The discovery of afterglow emission from long GRBs was a watershed event, pinpointing their origin to star-forming galaxies, ...
  17. The afterglow of GRB 050709 and the nature of the short-hard gamma-ray bursts.

    Nature 437(7060):845 (2005) PMID 16208362

    The final chapter in the long-standing mystery of the gamma-ray bursts (GRBs) centres on the origin of the short-hard class of bursts, which are suspected on theoretical grounds to result from the coalescence of neutron-star or black-hole binary systems. Numerous searches for the afterglows of s...
  18. The afterglow of GRB 050709 and the nature of the short-hard gamma-ray bursts.

    Nature 437(7060):845 (2005) PMID 16208362

    The final chapter in the long-standing mystery of the gamma-ray bursts (GRBs) centres on the origin of the short-hard class of bursts, which are suspected on theoretical grounds to result from the coalescence of neutron-star or black-hole binary systems. Numerous searches for the afterglows of s...
  19. The bright optical afterglow of the nearby gamma-ray burst of 29 March 2003.

    Nature 423(6942):844 (2003) PMID 12815424

    Past studies of cosmological gamma-ray bursts (GRBs) have been hampered by their extreme distances, resulting in faint afterglows. A nearby GRB could potentially shed much light on the origin of these events, but GRBs with a redshift z
  20. The bright optical afterglow of the nearby gamma-ray burst of 29 March 2003.

    Nature 423(6942):844 (2003) PMID 12815424

    Past studies of cosmological gamma-ray bursts (GRBs) have been hampered by their extreme distances, resulting in faint afterglows. A nearby GRB could potentially shed much light on the origin of these events, but GRBs with a redshift z