Redshift-Independent Distances in the Nasa/Ipac Extragalactic Database: Methodology, Content, and Use of Ned-D

Steer, Ian; Madore, Barry F.; Mazzarella, J. M.; Schmitz, Marion; Corwin, H. G.; Ebert, Rick; Hélou, G.; Baker, K. D.; Chen, Xi; Frayer, Cren; Jacobson, J. D.; Lo, Tak; Ogle, Patrick; Pevunova, O.; Terek, Scott

doi:10.3847/1538-3881/153/1/37

Cited by 54 publications

(64 citation statements)

References 123 publications

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“…LEDA offers one set of distances, combining redshiftindependent distance estimates with Hubble flow distances, corrected for local motions towards the Virgo cluster ("Virgocentric flow corrected", see Makarov et al 2014). The NASA Extragalactic Database (NED) also compiles distance estimates to galaxies (Steer et al 2017). The Extragalactic Distance Database (EDD, Tully et al 2009) and the CosmicFlows project (Courtois & Tully 2012;Tully et al 2016) are also compiling distances and estimating the location and motions to many thousands of local galaxies.…”

Section: Adopted Distance and Uncertaintymentioning

confidence: 99%

A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX Atlas of Local Galaxies

Leroy

Sandström

Lang

et al. 2019

ApJS

252

460

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We present an atlas of ultraviolet and infrared images of ∼ 15, 750 local (d 50 Mpc) galaxies, as observed by NASA's WISE and GALEX missions. These maps have matched resolution (FWHM 7.5 and 15 ), matched astrometry, and a common procedure for background removal. We demonstrate that they agree well with resolved intensity measurements and integrated photometry from previous surveys. This atlas represents the first part of a program (the z = 0 Multi-wavelength Galaxy Synthesis) to create a large, uniform database of resolved measurements of gas and dust in nearby galaxies. The images and associated catalogs will be publicly available at the NASA/IPAC Infrared Science Archive. This atlas allows us estimate local and integrated star formation rates (SFRs) and stellar masses (M ) across the local galaxy population in a uniform way. In the appendix, we use the population synthesis fits of Salim et al. (2016Salim et al. ( , 2018 to calibrate integrated M and SFR estimators based on GALEX and WISE. Because they leverage an SDSS-base training set of > 100, 000 galaxies, these calibrations have high precision and allow us to rigorously compare local galaxies to Sloan Digital Sky Survey results. We provide these SFR and M estimates for all galaxies in our sample and show that our results yield a "main sequence" of star forming galaxies comparable to previous work. We also show the distribution of intensities from resolved galaxies in NUV-to-WISE1 vs. WISE1-to-WISE3 space, which captures much of the key physics accessed by these bands.

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Section: Adopted Distance and Uncertaintymentioning

confidence: 99%

A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX Atlas of Local Galaxies

Leroy

Sandström

Lang

et al. 2019

ApJS

252

460

View full text Add to dashboard Cite

show abstract

“…In order to obtain the most accurate distances for the galaxies, we first used data from the NED Distances Database (NED-D 2 ; Steer et al 2017). If a galaxy had distance measurements within NED-D obtained from Cepheid variables, the tip of the red giant branch or Type Ia supernovae (in that order of precedence), we took the mean of the distances calculated using that method to obtain the best galaxy distance.…”

Section: Sample Creationmentioning

confidence: 99%

A new, clean catalogue of extragalactic non-nuclear X-ray sources in nearby galaxies

Earnshaw

Roberts

Middleton

et al. 2018

Monthly Notices of the Royal Astronomical Society

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We have created a new, clean catalogue of extragalactic non-nuclear X-ray sources by correlating the 3XMM-DR4 data release of the XMM-Newton Serendipitous Source Catalogue with the Third Reference Catalogue of Bright Galaxies and the Catalogue of Neighbouring Galaxies, using an improved version of the method presented in Walton et al. (2011). Our catalogue contains 1,314 sources, of which 384 are candidate ultraluminous X-ray sources (ULXs). The resulting catalogue improves upon previous catalogues in its handling of spurious detections by taking into account XMM-Newton quality flags. We estimate the contamination of ULXs by background sources to be 24 per cent. We define a 'complete' subsample as those ULXs in galaxies for which the sensitivity limit is below 10 39 erg s −1 and use it to examine the hardness ratio properties between ULX and non-ULX sources, and ULXs in different classes of host galaxy. We find that ULXs have a similar hardness ratio distribution to lower-luminosity sources, consistent with previous studies. We also find that ULXs in spiral and elliptical host galaxies have similar distributions to each other independent of host galaxy morphology, however our results do support previous indications that the population of ULXs is more luminous in star-forming host galaxies than in non-star-forming galaxies. Our catalogue contains further interesting subpopulations for future study, including Eddington Threshold sources and highly variable ULXs. We also examine the highest-luminosity (L X > 5 × 10 40 erg s −1 ) ULXs in our catalogue in search of intermediate-mass black hole candidates, and find nine new possible candidates.

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“…This paper investigates the appearance of a previously unknown ULX during the latest Chandra observation in 2017 of NGC 925, a spiral galaxy at 9.56 Mpc (from Cepheids distances recorded in the NED Distances Database 1 ; Steer et al 2017). The galaxy is known to contain two previously studied ULXs (Pintore et al 2018b); we report on the discovery of a third ULX at position 02 h 27 m 20 s .18, +33 • 34 12.84 (J2000) which we designate NGC 925 ULX-3 (henceforth ULX-3 in this paper).…”

Section: Introductionmentioning

confidence: 99%

The (Re)appearance of NGC 925 ULX-3, a New Transient ULX

Earnshaw

Heida

Brightman

et al. 2020

ApJ

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We report the discovery of a third ULX in NGC 925 (ULX-3), detected in November 2017 by Chandra at a luminosity of L X = (7.8 ± 0.8) × 10 39 erg s −1 . Examination of archival data for NGC 925 reveals that ULX-3 was detected by Swift at a similarly high luminosity in 2011, as well as by XMM-Newton in January 2017 at a much lower luminosity of L X = (3.8 ± 0.5) × 10 38 erg s −1 . With an additional Chandra non-detection in 2005, this object demonstrates a high dynamic range of flux of factor 26. In its high-luminosity detections, ULX-3 exhibits a hard power-law spectrum with Γ = 1.6 ± 0.1, whereas the XMM-Newton detection is slightly softer, with Γ = 1.8 +0.2 −0.1 and also well-fitted with a broadened disc model. The long-term light curve is sparsely covered and could be consistent either with the propeller effect or with a large-amplitude superorbital period, both of which are seen in ULXs, in particular those with neutron star accretors. Further systematic monitoring of ULX-3 will allow us to determine the mechanism by which ULX-3 undergoes its extreme variability and to better understand the accretion processes of ULXs.

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Redshift-Independent Distances in the Nasa/Ipac Extragalactic Database: Methodology, Content, and Use of Ned-D

Cited by 54 publications

References 123 publications

A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX Atlas of Local Galaxies

A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX Atlas of Local Galaxies

A new, clean catalogue of extragalactic non-nuclear X-ray sources in nearby galaxies

The (Re)appearance of NGC 925 ULX-3, a New Transient ULX

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