The structure of the outer Galactic disc as revealed by IPHAS early A stars

@article{Sale2010TheSO,
  title={The structure of the outer Galactic disc as revealed by IPHAS early A stars},
  author={S E Sale and J E Drew and Christian Knigge and Albert A. Zijlstra and Michael J. Irwin and R. A. H. Morris and Steven Phillipps and Jeremy J. Drake and Robert Greimel and Yvonne C Unruh and Paul J. Groot and Antonio Mampaso and Nicholas A. Walton},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2010},
  volume={402},
  pages={713-723}
}
  • S. SaleJ. Drew N. Walton
  • Published 21 September 2009
  • Physics
  • Monthly Notices of the Royal Astronomical Society
This study is an investigation of the stellar density profile of the Galactic disc in the Anticentre direction. We select over 40,000 early A stars from IPHAS photometry in the Galactic longitude range 160 ◦ < l < 200 ◦ close to the equatorial plane (−1 ◦ < b < +1 ◦ ). We then compare their observed reddening-corrected apparent magnitude distribution with simulated photometry obtained from parameterised models in order to set constraints on the Anticentre stellar density profile. By selecting A… 

Figures and Tables from this paper

A and F stars as probes of outer Galactic disc kinematics

Previous studies of the rotation law in the outer Galactic disc have mainly used gas tracers or clump giants. Here, we explore A and F stars as alternatives: these provide a much denser sampling in

Disk stars in the Milky Way detected beyond 25 kpc from its center

CONTEXT. The maximum size of the Galactic stellar disk is not yet known. Some studies have suggested an abrupt drop-off of the stellar density of the disk at Galactocentric distances $R\gtrsim 15$

Ejection velocities of high Galactic latitude runaway stars

We estimate the distribution of ejection velocities for the known population of high Galactic latitude runaway stars. The initial sample is a collection of 174 early-type stars selected from the

THE STELLAR POPULATION STRUCTURE OF THE GALACTIC DISK

The spatial structure of stellar populations with different chemical abundances in the Milky Way (MW) contains a wealth of information on Galactic evolution over cosmic time. We use data on 14,699

THE EDGE OF THE YOUNG GALACTIC DISK

In this work, we report and discuss the detection of two distant diffuse stellar groups in the third Galactic quadrant. They are composed of young stars, with spectral types ranging from late O to

Structure of the outer Galactic disc with Gaia DR2

Context. The structure of outer disc of our Galaxy is still not well described, and many features need to be better understood. The second Gaia data release (DR2) provides data in unprecedented

First results of an Hα based search of classical Be stars in the Perseus Arm and beyond

We investigate a region of the Galactic plane, between 120 6 ‘ 6 140 and 1 6 b 6 +4 , and uncover a population of moderately reddened(E(B V) 1) classical Be stars within and beyond the Perseus and

RED RUNAWAYS: HYPERVELOCITY STARS, HILLS EJECTA, AND OTHER OUTLIERS IN THE F-TO-M STAR REGIME

In this paper we analyze a sample of metal-rich (>−0.8 dex) main sequence stars in the extended solar neighborhood, investigating kinematic outliers from the background population. The data, which

ON RINGS AND STREAMS IN THE GALACTIC ANTI-CENTER

We confirm that there are at least three separate low-latitude overdensities of blue F turnoff stars near the Milky Way anti-center: the Monoceros Ring, the Anti-Center Stream (ACS), and the Eastern

The Kinematics of the Outer Galactic Disk from A and F Stars

The kinematics of stars in the outer Galactic disk is poorly known. In addition to constraining the Galactic potential, knowledge of the motions of stars throughout the disk facilitates studies of

References

SHOWING 1-10 OF 86 REFERENCES

NGC 300: An Extremely Faint, Outer Stellar Disk Observed to 10 Scale Lengths

We have used the Gemini Multi-Object Spectrograph (GMOS) on the Gemini South 8 m telescope in exceptional conditions (0.″6 FWHM seeing) to observe the outer stellar disk of the Sculptor Group galaxy

Galactic Metallicity Gradients Derived from a Sample of OB Stars

The distribution of stellar abundances along the Galactic disk is an important constraint for models of chemical evolution and Galaxy formation. In this study we derive radial gradients of C, N, O,

THE ABUNDANCE GRADIENT IN THE EXTREMELY FAINT OUTER DISK OF NGC 300

In an earlier work, we showed for the first time that the resolved stellar disk of NGC 300 is very extended with no evidence for truncation, a phenomenon that has since been observed in other disk

The Stellar Populations in the Outer Regions of M33. II. Deep ACS Imaging

Studying the stellar populations in the outskirts of spiral galaxies can provide important constraints on their structure, formation, and evolution. To that end, we present VI photometry obtained

THE DETECTION OF INSIDE-OUT DISK GROWTH IN M33

We present resolved stellar photometry of four fields along the major axis of the M33 disk from images taken with the Advanced Camera for Surveys aboard the Hubble Space Telescope. The photometry

The structure of galactic disks - Studying late-type spiral galaxies using SDSS

Using imaging data from the SDSS survey, we present the g' and r' radial stellar light distribution of a complete sample of similar to 90 face-on to intermediate inclined, nearby, late-type (Sb-Sdm)

Early‐A stars from IPHAS, and their distribution in and around the Cyg OB2 association

Stellar photometry derived from the INT/WFC Photometric HSurvey of the North- ern Galactic Plane (IPHAS) can be used to identify large, reliable samples of A0-A5 dwarfs. For every A star, so

The Milky Way Tomography with SDSS. I. Stellar Number Density Distribution

Using the photometric parallax method we estimate the distances to ~48 million stars detected by the Sloan Digital Sky Survey (SDSS) and map their three-dimensional number density distribution in the

SINFONI in the Galactic Center: Young Stars and Infrared Flares in the Central Light-Month

We report on 75 mas resolution, near-IR imaging spectroscopy within the central 30 lt-days of the Galactic center, taken with the new adaptive optics-assisted integral-field spectrometer SINFONI on

The Distribution of the Elements in the Galactic Disk

This paper reports on the spectroscopic investigation of 54 Cepheids, deriving parameters and abundances. These Cepheids extend previous samples by about 35% in number and increase the amount of the
...