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Flash/Heros SSAP
Spectra from the Flash and Heros Echelle spectrographs developed at Landessternwarte Heidelberg and mounted at La Silla and various other observatories. The data mostly contains... -
Flash/Heros Split-Order SSAP Service
Spectra from the Flash and Heros Echelle spectrographs developed at Landessternwarte Heidelberg and mounted at La Silla and various other observatories. The data mostly contains... -
FEROS Public Spectra
Spectra from FEROS spectrograph at La Silla's 1.5m telescope as obtained during commissioning and guaranteed time. -
OB stars in Carina Arm
In large-scale maps of the Galactic disc, the Carina Arm stands out as a clear spiral feature, hosting prominent star clusters and associations rich in massive stars. We study... -
182 RSGs and OB-stars in M31 and M33
Recent work measuring the binary fraction of evolved red supergiants (RSGs) in the Magellanic Clouds points to a value between 15% and 30%, with the majority of the companions... -
Chandra obs. of the Trifid region & ARCoIRIS sp.
The dynamical states of molecular clouds may affect the properties of the stars they form. In the vicinity of the Trifid Nebula (d=1180+/-25pc), the main star cluster (Trifid... -
Cygnus OB2 Complex survey with Subaru HSC
Low-mass star formation inside massive clusters is crucial to understand the effect of cluster environment on processes like circumstellar disc evolution, planet, and brown... -
+150 OB stars in Sextans A
Local Group (LG) very metal-poor massive stars are the best proxy for the First Stars of the Universe and fundamental to modelling the evolution of early galaxies. These stars... -
Milky Way Project DR2 bubbles & bow shocks
Citizen science has helped astronomers comb through large data sets to identify patterns and objects that are not easily found through automated processes. The Milky Way Project... -
Kinematic data for stars in OB-associations
We use stellar proper motions from the catalog TGAS (2016, Cat. I/337) to study the kinematics of OB-associations identified by Blaha and Humphreys (1989AJ.....98.1598B). The... -
OBe stellar masses
Massive binaries play an important role in fields ranging from gravitational- wave astronomy to stellar evolution. We provide several lines of evidence that classical OBe stars... -
527 luminous blue stars spectroscopic analysis
Blue supergiants (BSGs) are key objects for understanding the evolution of massive stars. However, discrepancies between theoretical predictions and empirical observations have... -
Parameters of OB stars with IR excess
The infrared (IR) excess from OB stars is commonly considered to be a contribution from ionized stellar wind or circumstellar dust. With the newly published Large Sky Area... -
Kinematic data for O-B5 stars
This document describes the magnetic tape version of a catalog of 1440 O-B5 star with radial velocities accurate to within 5 km/sec, located within 3 kpc of the sun and within... -
New list of OB associations
A new partition into associations of OB stars within 3kpc of the Sun is derived using Battinelli's modification of the cluster analysis method. We have found 58 associations, of... -
Catalogue of OB Associations
OB associations are unbound groups of young stars made prominent by their bright OB members, and have long been thought to be the expanded remnants of dense star clusters. They... -
Kinematic data for high luminosity stars
We calculated the median parallaxes for 47 OB associations including at least 10 stars with known Gaia DR2 parallaxes. A comparison between trigonometric and photometric... -
OB stars and associations in Auriga
OB associations are important probes of recent star formation and Galactic structure. In this study, we focus on the Auriga constellation, an important region of star formation... -
Large-scale expansion of OB stars in Cygnus
The proper motions (PMs) of OB stars in Cygnus have recently been found to exhibit two large-scale kinematic patterns suggestive of expansion. We perform a 3D traceback on these... -
Revisiting the Cygnus OB associations
OB associations play an important role in Galactic evolution, though their origins and dynamics remain poorly studied, with only a small number of systems analysed in detail. In...