BAYESIAN MATCHING FOR X-RAY AND INFRARED SOURCES IN THE MYStIX PROJECT

Naylor, T.; Broos, P. S.; Feigelson, E. D.

doi:10.1088/0067-0049/209/2/30

Cited by 46 publications

(95 citation statements)

References 29 publications

(50 reference statements)

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“…We have employed our own custom software, ACIS Extract, to accommodate these observational challenges; this software is supported, welldocumented, and available to the community. 19 For MYStIX, the X-ray catalogs from MOXC have been combined with other Chandra data analyzed with the same methods (Kuhn et al 2013a), along with near-IR data (King et al 2013;Naylor et al 2013) and Spitzer mid-IR data (Kuhn et al 2013b;Povich et al 2013); this multiwavelength dataset has been subjected to a Bayesian source classification scheme, resulting in a list of "MYStIX Probable Complex Members" ) that will be used for science analysis.…”

Section: Doradus (The Tarantula Nebula)mentioning

confidence: 99%

The Massive Star-Forming Regions Omnibus X-Ray Catalog

Townsley

Broos

Garmire

et al. 2014

ApJS

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We present the Massive Star-forming Regions (MSFRs) Omnibus X-ray Catalog (MOXC), a compendium of X-ray point sources from Chandra/ACIS observations of a selection of MSFRs across the Galaxy, plus 30 Doradus in the Large Magellanic Cloud. MOXC consists of 20,623 X-ray point sources from 12 MSFRs with distances ranging from 1.7 kpc to 50 kpc. Additionally, we show the morphology of the unresolved X-ray emission that remains after the cataloged X-ray point sources are excised from the ACIS data, in the context of Spitzer and WISE observations that trace the bubbles, ionization fronts, and photon-dominated regions that characterize MSFRs. In previous work, we have found that this unresolved X-ray emission is dominated by hot plasma from massive star wind shocks. This diffuse X-ray emission is found in every MOXC MSFR, clearly demonstrating that massive star feedback (and the several-million-degree plasmas that it generates) is an integral component of MSFR physics.

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Section: Doradus (The Tarantula Nebula)mentioning

confidence: 99%

The Massive Star-Forming Regions Omnibus X-Ray Catalog

Townsley

Broos

Garmire

et al. 2014

ApJS

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“…Analysis of IR counterparts matched to X-ray sources has proven to be a critical component of classifying X-sources and evaluating their probability of membership in MSFRs . Naylor et al (2013) matched the various MYStIX Chandra catalogs to the more complete Spitzer archive source lists (Benjamin et al 2003;K13), presenting an opportunity to find new IRE counterparts to X-ray sources that were omitted from the MIRES analysis, which was based on the highly reliable Catalogs to reduce contamination in our "blind," IRE-only search.…”

Section: Sed Classification Applied To Ir Counterparts Of Mystix X-ramentioning

confidence: 99%

“…2. Cross-matching was done by Naylor et al (2013) in an X-ray-centric fashion. It is possible to get a different NIR match to a given MIR source that appears in MIRES.…”

Section: Sed Classification Applied To Ir Counterparts Of Mystix X-ramentioning

confidence: 99%

THE MYStIX INFRARED-EXCESS SOURCE CATALOG

Povich

Kuhn

Busk

et al. 2013

ApJS

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The Massive Young Star-Forming Complex Study in Infrared and X-rays (MYStIX) project provides a comparative study of 20 Galactic massive star-forming complexes (d = 0.4-3.6 kpc). Probable stellar members in each target complex are identified using X-ray and/or infrared data via two pathways: (1) X-ray detections of young/massive stars with coronal activity/strong winds or (2) infrared excess (IRE) selection of young stellar objects (YSOs) with circumstellar disks and/or protostellar envelopes. We present the methodology for the second pathway using Spitzer/IRAC, 2MASS, and UKIRT imaging and photometry. Although IRE selection of YSOs is well-trodden territory, MYStIX presents unique challenges. The target complexes range from relatively nearby clouds in uncrowded fields located toward the outer Galaxy (e.g., NGC 2264, the Flame Nebula) to more distant, massive complexes situated along complicated, inner Galaxy sightlines (e.g., NGC 6357, M17). We combine IR spectral energy distribution (SED) fitting with IR color cuts and spatial clustering analysis to identify IRE sources and isolate probable YSO members in each MYStIX target field from the myriad types of contaminating sources that can resemble YSOs: extragalactic sources, evolved stars, nebular knots, and even unassociated foreground/background YSOs. Applying our methodology consistently across 18 of the target complexes, we produce the MYStIX IRE Source (MIRES) Catalog comprising 20,719 sources, including 8686 probable stellar members of the MYStIX target complexes. We also classify the SEDs of 9365 IR counterparts to MYStIX X-ray sources to assist the first pathway, the identification of X-ray-detected stellar members. The MIRES Catalog provides a foundation for follow-up studies of diverse phenomena related to massive star cluster formation, including protostellar outflows, circumstellar disks, and sequential star formation triggered by massive star feedback processes.

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“…In addition to the data from Spitzer, the MYStIX project includes NIR data obtained by the United Kingdom Infra-Red Telescope (King et al 2013) and the Two Micron All Sky Survey (Skrutskie et al 2006) and X-ray data obtained by the Chandra X-Ray Observatory . The procedures for constructing the combined sample of X-ray-selected members, IRE-selected members, and spectrally selected OB members is described by Naylor et al (2013), Povich et al (2013), and Broos et al (2013). We describe the available GLIMPSE data (Section 2) and our procedures for analyzing other archival images from IRAC (Section 3).…”

Section: Introductionmentioning

confidence: 99%

The Massive Young Star-Forming Complex Study in Infrared and X-Ray: Mid-Infrared Observations and Catalogs

Kuhn

Povich

Luhman

et al. 2013

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Spitzer IRAC observations and stellar photometric catalogs are presented for the Massive Young Star-Forming Complex Study in the Infrared and X-ray (MYStIX). MYStIX is a multiwavelength census of young stellar members of 20 nearby (d < 4 kpc), Galactic, star-forming regions that contain at least one O star. All regions have data available from the Spitzer Space Telescope consisting of GLIMPSE or other published catalogs for 11 regions and results of our own photometric analysis of archival data for the remaining 9 regions. This paper seeks to construct deep and reliable catalogs of sources from the Spitzer images. Mid-infrared study of these regions faces challenges of crowding and high nebulosity. Our new catalogs typically contain fainter sources than existing Spitzer studies, which improves the match rate to Chandra X-ray sources that are likely to be young stars, but increases the possibility of spurious point-source detections, especially peaks in the nebulosity. IRAC color-color diagrams help distinguish spurious detections of nebular polycyclic aromatic hydrocarbon emission from the infrared excess associated with dusty disks around young stars. The distributions of sources on the mid-infrared color-magnitude and color-color diagrams reflect differences between MYStIX regions, including astrophysical effects such as stellar ages and disk evolution.

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BAYESIAN MATCHING FOR X-RAY AND INFRARED SOURCES IN THE MYStIX PROJECT

Cited by 46 publications

References 29 publications

The Massive Star-Forming Regions Omnibus X-Ray Catalog

The Massive Star-Forming Regions Omnibus X-Ray Catalog

THE MYStIX INFRARED-EXCESS SOURCE CATALOG

The Massive Young Star-Forming Complex Study in Infrared and X-Ray: Mid-Infrared Observations and Catalogs

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