The SDSS–2MASS–WISE 10-dimensional stellar colour locus

Davenport, James R. A.; Ivezić, Željko; Becker, A. C.; Ruan, John J.; Hunt-Walker, Nicholas; Covey, Kevin R.; Lewis, Alexia R.; AlSayyad, Yusra; Anderson, Lauren

doi:10.1093/mnras/stu466

Cited by 77 publications

(96 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We are about s 2 discrepant from the work of Nataf et al (2013), though we note that the spread in ( ) ( ) --E V I E J K reported there is attributed to real variation in the extinction curve rather than uncertainty, making a s 2 offset very significant. We find in general poor agreement with the results of Davenport et al (2014), possibly due to a systematic effect arising from adopting an intrinsic color relation best suited to dwarfs to find the reddenings of likely giants.…”

Section: Comparison With Photometric Measurementscontrasting

confidence: 84%

The Optical–infrared Extinction Curve and Its Variation in the Milky Way

Schlafly

Meisner

Stutz

et al. 2016

ApJ

259

278

View full text Add to dashboard Cite

The dust extinction curve is a critical component of many observational programs and an important diagnostic of the physics of the interstellar medium. Here we present new measurements of the dust extinction curve and its variation toward tens of thousands of stars, a hundred-fold larger sample than in existing detailed studies. We use data from the APOGEE spectroscopic survey in combination with ten-band photometry from Pan-STARRS1, the Two Micron All-Sky Survey, and Wide-field Infrared Survey Explorer. We find that the extinction curve in the optical through infrared is well characterized by a one-parameter family of curves described by R(V). The extinction curve is more uniform than suggested in past works, with ( ( )) s = R V 0.18, and with less than one percent of sight lines having ( ) > R V 4. Our data and analysis have revealed two new aspects of Galactic extinction: first, we find significant, wide-area variations in R(V) throughout the Galactic plane. These variations are on scales much larger than individual molecular clouds, indicating that R(V) variations must trace much more than just grain growth in dense molecular environments. Indeed, we find no correlation between R(V) and dust column density up to ( ) -» E B V 2. Second, we discover a strong relationship between R(V) and the far-infrared dust emissivity.

show abstract

Section: Comparison With Photometric Measurementscontrasting

confidence: 84%

The Optical–infrared Extinction Curve and Its Variation in the Milky Way

Schlafly

Meisner

Stutz

et al. 2016

ApJ

259

278

View full text Add to dashboard Cite

show abstract

“…Rieke & Lebofsky (1985) measured α = 1.65 using a small number of stars, however, Xue et al (2016) measured a slightly larger value of α = 1.79. The value of α corresponding to the measurements from Davenport et al (2014) is 1.25, significantly less steep than other studies. Wang & Jiang (2014) studied the universality of the NIR extinction law using color excess ratios of APOGEE M and K giants, and found that the extinction law shows very little variation across different environments.…”

Section: Accounting For Interstellar Extinctioncontrasting

confidence: 66%

“…Rieke & Lebofsky (1985) found that the relative extinction at 10 µm due to the Galactic ISM extinction curve can be as large as the relative extinction in the K-band. Davenport et al (2014) used 1,052,793 main sequence stars from SDSS DR8 (Aihara et al 2011) with |b| > 10…”

Section: Accounting For Interstellar Extinctionmentioning

confidence: 99%

Collisions of Terrestrial Worlds: The Occurrence of Extreme Mid-infrared Excesses around Low-mass Field Stars

Theissen

West

2017

View full text Add to dashboard Cite

We present the results of an investigation into the occurrence and properties (stellar age and mass trends) of low-mass field stars exhibiting extreme mid-infrared (MIR) excesses (L IR /L * 0.01). Stars for the analysis were initially selected from the Motion Verified Red Stars (MoVeRS) catalog of photometric stars with SDSS, 2MASS, and WISE photometry and significant proper motions. We identify 584 stars exhibiting extreme MIR excesses, selected based on an empirical relationship for main sequence W 1−W 3 colors. For a small subset of the sample, we show, using spectroscopic tracers of stellar age (Hα and Li i) and luminosity class, that the parent sample is likely comprised of field dwarfs ( 1 Gyr). We also develop the Low-mass Kinematics (LoKi ) galactic model to estimate the completeness of the extreme MIR excess sample. Using Galactic height as a proxy for stellar age, the completeness corrected analysis indicates a distinct age dependence for field stars exhibiting extreme MIR excesses. We also find a trend with stellar mass (using r − z color as a proxy). Our findings are consistent with the detected extreme MIR excesses originating from dust created in a shortlived collisional cascade ( 100, 000 years) during a giant impact between two large planetismals or terrestrial planets. These stars with extreme MIR excesses also provide support for planetary collisions being the dominant mechanism in creating the observed Kepler dichotomy (the need for more than a single mode, typically two, to explain the variety of planetary system architectures Kepler has observed), rather than different formation mechanisms.

show abstract

“…Their results for |b| > 50 • are indicated in Fig. 8 We note that for latitudes 25 • < b < 50 • Davenport, et al (2014) have found an especially strong increase in extinction (relative to A V ) in the H and K s bands. At latitudes 50 • < b < 90 • , the relative extinction in the H and K s bands decreases, but the extinction increases strongly in W 1 and W 2.…”

Section: Variations In the Extinction Lawmentioning

confidence: 77%

Interstellar Extinction

Gontcharov

2016

Astrophysics

View full text Add to dashboard Cite

Key words: interstellar extinction: reddening: interstellar dust particles: characteristics and properties of the Milky Way galaxy.This review describes our current understanding of interstellar extinction. This differ substantially from the ideas of the 20th century. With infrared surveys of hundreds of millions of stars over the entire sky, such as 2MASS, SPITZER-IRAC, and WISE, we have looked at the densest and most rarefied regions of the interstellar medium at distances of a few kpc from the sun. Observations at infrared and microwave wavelengths, where the bulk of the interstellar dust absorbs and radiates, have brought us closer to an understanding of the distribution of the dust particles on scales of the Galaxy and the Universe. We are in the midst of a scientific revolution in our understanding of the interstellar medium and dust. Progress in, and the key results of, this revolution are still difficult to predict. Nevertheless, (a) a physically justified model has been developed for the spatial distribution of absorbing material over the nearest few kiloparsecs, including the Gould belt as a dust container, which gives an accurate estimate of the extinction for any object just in terms of its galactic coordinates. It is also clear that (b) the interstellar medium makes up roughly half the mass of matter in the galactic vicinity of the solar system (the other half is made up of stars, their remnants, and dark matter) and (c) the interstellar medium and, especially, dust, differ substantially in different regions of space, and deep space cannot be understood by only studying nearby space. *

show abstract

The SDSS–2MASS–WISE 10-dimensional stellar colour locus

Cited by 77 publications

References 46 publications

The Optical–infrared Extinction Curve and Its Variation in the Milky Way

The Optical–infrared Extinction Curve and Its Variation in the Milky Way

Collisions of Terrestrial Worlds: The Occurrence of Extreme Mid-infrared Excesses around Low-mass Field Stars

Interstellar Extinction

Contact Info

Product

Resources

About