Runaways and shells around the CMa OB1 association

  title={Runaways and shells around the CMa OB1 association},
  author={B. Fernandes and Thierry Montmerle and T. Santos-Silva and J. Gregorio-Hetem},
  journal={Astronomy \& Astrophysics},
Context. The origin of the arc-shaped Sh 2-296 nebula is still unclear. Mainly due to its morphology, the nebula has been suggested to be a 0.5 Myr old supernova remnant (SNR) that could be inducing star formation in the CMa OB1 association. This means that the region might be an excellent laboratory for investigating the influence of massive stars on their surroundings. Aims. We aim to show for the first time that the nebula is part of a large shell-like structure, which we have designated the… 

The K supergiant runaway star HD 137071

Context. Extensive work exists on runaway massive stars with peculiar motions that are much higher than those typical of the extreme Population I to which they belong. Work on runaways has focused

Canis Major OB1 stellar group contents revealed by Gaia

Canis Major OB1 (CMa OB1) is a Galactic stellar association with a very intriguing star-formation scenario. There are more than two dozen known star clusters in its line of sight, but it is not

Searching for Active Low-mass Stars in the CMa Star-forming Region: Multi-band Photometry with T80S

An exotic environment surrounds the young stellar groups associated with the Canis Major (CMa) OB1/R1 region, which probably was formed under feedback from at least three supernova events having

OB Associations and their origins

  • N. Wright
  • Physics, Geology
    New Astronomy Reviews
  • 2020

Hα emission-line stars in molecular clouds

A deep objective-prism survey for Hα emission stars towards the Canis Major star-forming clouds was performed. A total of 398 Hα emitters were detected, 353 of which are new detections. There is a

Current status and future plan of Osaka Prefecture University 1.85-m mm-submm telescope project

We report the current status of the 1.85-m mm-submm telescope installed at the Nobeyama Radio Observatory (altitude 1400 m) and the future plan. The scientific goal is to reveal the physical/chemical



Observational evidence for supernova-induced star formation: Canis Major R1.

The R association CMa R1, which contains two classical Herbig emission stars (Z CMa and HD 53367) and several other extremely young stellar objects, is found to lie at the edge of a large-scale ring

A Molecular Shell with Star Formation toward the Supernova Remnant G349.7+0.2

A field of about 38′ × 38′ around the supernova remnant (SNR) G349.7+0.2 has been surveyed in the CO J = 1–0 transition with the 12 m telescope of the NRAO, using the on-the-fly technique. The

Star formation history of Canis Major OB1 II. A bimodal X-ray population revealed by XMM-Newton

The Canis Major OB1 Association has an intriguing scenario of star formation, especially in the Canis Major R1 (CMa R1) region traditionally assigned to a reflection nebula, but in reality an ionized

XMM-Newton observations of a superbubble in N 158 in the LMC

Aims: We study the diffuse X-ray emission observed in the field of view of the pulsar B 0540-69 in the Large Magellanic Cloud (LMC) by XMM-Newton. We want to understand the nature of this soft

Star formation history of Canis Major R1 I. Wide-Field X-ray study of the young stellar population

Aims. The CMa R1 star-forming region contains several compact clusters as well as many young early-B stars. It is associated with a well-known bright rimmed nebula, the nature of which is unclear

X-Rays from Superbubbles in the Large Magellanic Cloud. V. The H II Complex N11

The giant H II complex N11 in the Large Magellanic Cloud contains OB associations at several different stages in their life histories. We have obtained ROSAT PSPC and HRI X-ray observations, Curtis

The Galactic Distribution of Large H I Shells

We report the discovery of 19 new H I shells in the Southern Galactic Plane Survey (SGPS). These shells, which range in radius from 40 pc to 1 kpc, were found in the low-resolution Parkes portion of

Low-Mass Runaway Stars from the Orion Trapezium Cluster

In the course of a search for common proper-motion binaries in the Jones & Walker (JW) catalog of proper motions in the Orion Nebula Cluster, we came across several faint stars with proper motions

Galactic H I supershells: kinetic energies and possible origin

Context. The Milky Way, when viewed in the neutral hydrogen line emission, presents large structures called Galactic supershells (GSs). The origin of these structures is still a subject of debate.

The long-period massive binary HD 54662 revisited

Context. HD 54662 is an O-type binary star belonging to the CMa OB1 association. Because of its long-period orbit, this system is an interesting target to test the adiabatic wind shock model. Aims.