Despite over 35 years of constant satellite-based measurements of cloud, reliable evidence of a long-hypothesized link between changes in solar activity and...
A cosmological context for compact massive galaxies
To provide a quantitative cosmological context to ongoing observational work on the formation histories and location of compact massive galaxies, we locate and...
A Counterrotating Bulge in the S(b) Galaxy NGC 7331
We have found that the bulge of the large, nearby Sb galaxy NGC 7331 rotates retrograde to its disk. Analysis of spectra in the region of the near-IR Ca II...
A Counterrotating Central Component in the Barred Galaxy NGC 5728
We present a detailed study of the stellar kinematics in the barred galaxy NGC 5728 based on I-band photometry and long-slit spectroscopic observations in the...
A counterrotating core in the merger remnant candidate NGC 3656 (ARP 155)
A study is presented of the internal velocity structure of NGC 3656, a galaxy with several morphological signatures of being in an advanced merger stage...
A criterion for the measurement of equivalent widths
A simple standard criterion for computer measurement of the equivalent widths of digitized blended spectral lines and for drawing a local continuum as defined...
A crucial test for astronomical spectrograph calibration with frequency combs
Laser frequency combs (LFCs) are well on their way to becoming the next-generation calibration sources for precision astronomical spectroscopy 1-6. This...
A cut-off in the TeV gamma-ray spectrum of the SNR Cassiopeia A
It is widely believed that the bulk of the Galactic cosmic rays is accelerated in supernova remnants (SNRs). However, no observational evidence of the presence...
A dark jet dominates the power output of the stellar black hole Cygnus X-1
Black holes undergoing accretion are thought to emit the bulk of their power in the X-ray band by releasing the gravitational potential energy of the infalling...