RECORD
Proper motions of five OB stars with candidate dusty bow shocks in the Carina Nebula
Solar and Stellar Astrophysics · Submitted 9 Mar 2017
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim None of the five stars are moving away from the Carina Nebula's central clusters as runaway stars would be, confirming that a candidate bow shock is not necessarily indicative of a runaway star.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
We constrain the proper motions of five OB stars associated with candidate stellar wind bow shocks in the Carina Nebula using HST ACS imaging over 9--10 year baselines. These proper motions allow us to directly compare each star's motion to the orientation of its candidate bow shock. Although these stars are saturated in our imaging, we assess their motion by the shifts required to minimize residuals in their Airy rings. The results limit the direction of each star's motion to sectors less than 90 degrees wide. None of the five stars are moving away from the Carina Nebula's central clusters as runaway stars would be, confirming that a candidate bow shock is not necessarily indicative of a runaway star. Two of the five stars are moving tangentially relative to the orientation of their candidate bow shocks, both of which point at the OB cluster Trumpler 14. In these cases, the large-scale flow of the interstellar medium, powered by feedback from the cluster, appears to dominate over the motion of the star in producing the observed candidate bow shock. The remaining three stars all have some component of motion toward the central clusters, meaning that we cannot distinguish whether their candidate bow shocks are indicators of stellar motion, of the flow of ambient gas, or of density gradients in their surroundings. In addition, these stars' lack of outward motion hints that the distributed massive-star population in Carina's South Pillars region formed in place, rather than migrating out from the association's central clusters.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We constrain the proper motions of five OB stars associated with candidate stellar wind bow shocks in the Carina Nebula using HST ACS imaging over 9--10 year baselines. | contribution 0.57 | 0.97 | 0.04 | asserted 0.99 |
| s1 | These proper motions allow us to directly compare each star's motion to the orientation of its candidate bow shock. | contribution 0.57 | 0.88 | 0.05 | asserted 0.99 |
| s2 | Although these stars are saturated in our imaging, we assess their motion by the shifts required to minimize residuals in their Airy rings. | method 0.98 | 0.95 | 0.02 | asserted 1.00 |
| s3 | The results limit the direction of each star's motion to sectors less than 90 degrees wide. | result 0.98 | 0.96 | 0.09 | asserted 0.99 |
| s4 | None of the five stars are moving away from the Carina Nebula's central clusters as runaway stars would be, confirming that a candidate bow shock is not necessarily indicative of a runaway star. | result 0.70 | 0.95 | 0.49 | asserted 1.00 |
| s5 | Two of the five stars are moving tangentially relative to the orientation of their candidate bow shocks, both of which point at the OB cluster Trumpler 14. | result 1.00 | 0.94 | 0.14 | asserted 1.00 |
| s6 | In these cases, the large-scale flow of the interstellar medium, powered by feedback from the cluster, appears to dominate over the motion of the star in producing the observed candidate bow shock. | interpretation 1.00 | 0.77 | 0.20 | hedged possibility 0.81 |
| s7 | The remaining three stars all have some component of motion toward the central clusters, meaning that we cannot distinguish whether their candidate bow shocks are indicators of stellar motion, of the flow of ambient gas, or of density gradients in their surroundings. | interpretation 0.51 | 0.93 | 0.17 | asserted 0.60 |
| s8 | In addition, these stars' lack of outward motion hints that the distributed massive-star population in Carina's South Pillars region formed in place, rather than migrating out from the association's central clusters. | interpretation 0.99 | 0.83 | 0.15 | hedged possibility 0.92 |
What was examined, and what was not
- arXiv listing abstract v1
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
We constrain the proper motions of five OB stars associated with candidate stellar wind bow shocks in the Carina Nebula using HST ACS imaging over 9--10 year baselines. These proper motions allow us to directly compare each star's motion to the orientation of its candidate bow shock. Although these stars are saturated in our imaging, we assess their motion by the shifts required to minimize residuals in their Airy rings. The results limit the direction of each star's motion to sectors less than 90 degrees wide. None of the five stars are moving away from the Carina Nebula's central clusters as runaway stars would be, confirming that a candidate bow shock is not necessarily indicative of a runaway star. Two of the five stars are moving tangentially relative to the orientation of their candidate bow shocks, both of which point at the OB cluster Trumpler 14. In these cases, the large-scale flow of the interstellar medium, powered by feedback from the cluster, appears to dominate over the motion of the star in producing the observed candidate bow shock. The remaining three stars all have some component of motion toward the central clusters, meaning that we cannot distinguish whether their candidate bow shocks are indicators of stellar motion, of the flow of ambient gas, or of density gradients in their surroundings. In addition, these stars' lack of outward motion hints that the distributed massive-star population in Carina's South Pillars region formed in place, rather than migrating out from the association's central clusters.
Human review
How the literature uses it
What this paper does with the arXiv papers it cites
What it cites · 9 sentences without a confident label
Uses data or values from 1 paper
-
We adopt Oort's constants $A=15±1$ km s$^-1$ kpc$^-1$ and $B=-12±1$ km s$^-1$ kpc$^-1$ [ref] and components of the solar peculiar velocity $(U_,V_,W_)=(10±1,12±1,7±1)$ km s$^-1$ [ref] .
Galactic rotation in Gaia DR1 · Comparison to Absolute Proper Motions · 0.84
Cites as background 1 paper
-
They typically appear as arc-shaped features in optical line emission [ref] and/or thermal infrared continuum emission from dust [ref] .
A comprehensive search for stellar bowshock nebulae in the Milky Way: a catalog of 709 mid-infrared selected candidates · Introduction · 0.96
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.