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The Seventeenth Data Release of the Sloan Digital Sky Surveys : Complete Release of MaNGA, MaStar, and APOGEE-2 Data
- 2022
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Ingår i: Astrophysical Journal Supplement Series. - : Institute of Physics (IOP). - 0067-0049 .- 1538-4365. ; 259:2
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Tidskriftsartikel (refereegranskat)abstract
- This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the complete release of the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, which reached its goal of surveying over 10,000 nearby galaxies. The complete release of the MaNGA Stellar Library accompanies this data, providing observations of almost 30,000 stars through the MaNGA instrument during bright time. DR17 also contains the complete release of the Apache Point Observatory Galactic Evolution Experiment 2 survey that publicly releases infrared spectra of over 650,000 stars. The main sample from the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), as well as the subsurvey Time Domain Spectroscopic Survey data were fully released in DR16. New single-fiber optical spectroscopy released in DR17 is from the SPectroscipic IDentification of ERosita Survey subsurvey and the eBOSS-RM program. Along with the primary data sets, DR17 includes 25 new or updated value-added catalogs. This paper concludes the release of SDSS-IV survey data. SDSS continues into its fifth phase with observations already underway for the Milky Way Mapper, Local Volume Mapper, and Black Hole Mapper surveys.
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| 2. |
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| 3. |
- Sprague, A. L., et al.
(författare)
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Spectral emissivity measurements of Mercury's surface indicate Mg- and Ca-rich mineralogy, K-spar, Na-rich plagioclase, rutile, with possible perovskite, and garnet
- 2009
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Ingår i: Planetary and Space Science. - : Elsevier BV. - 0032-0633 .- 1873-5088. ; 57:3, s. 364-383
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Tidskriftsartikel (refereegranskat)abstract
- Mid-infrared 2-D spectroscopic measurements from 8.0 to 12.7 gm of Mercury were taken using Boston University's Mid-Infrared Spectrometer and Imager (MIRSI) mounted on the NASA Infrared Telescope Facility (IRTF) on Mauna Kea, Hawaii, 7-11 April 2006. Measurements reported here cover radar bright region C, a dark plains region west of Caloris Basin, and the interior of Caloris Basin. By use of spectral deconvolution with a large spectral library composed of many mineral compositions and grain size separates, we fitted, or "unmixed", the Mercury spectra. We find mineral suites composed of magnesium-rich orthopyroxene and olivine, Ca-, Mg-, Na-rich clinopyroxene, potassium feldspar, and Na-bearing plagioclase feldspar. Both Ca- and Mg-rich garnet (pyrope and grossular, respectively) are apparently present in small amounts. Opaque minerals are required for spectral matching, with rutile (TiO2) repeatedly providing the "best fit". However, in the case of the radar bright region C, perovskite also contributed to a very good fit. Caloris Basin infill is rich in both potassium feldspar and Na-rich plagioclase. There is little or no olivine in the Caloris interior smooth plains. Together with the high alkali content, this indicates that resurfacing magmas were low to intermediate in SiO2. Data suggest the dark plains exterior to Caloris are highly differentiated low-iron basaltic magmas resulting in material that might be classified as oligorclase basalts. (C) 2009 Elsevier Ltd. All rights reserved
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| 4. |
- Ksanfomality, L., et al.
(författare)
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Properties of the Hermean Surface
- 2001
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Ingår i: Workshop on Mercury: Space Environment, Surface, and Interior.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 5. |
- Sprague, A. L., et al.
(författare)
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Mercury: First Spectra from 0.7 to 5.5 µm Support Low FeO and Feldspathic Composition
- 2004
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Ingår i: 35th Lunar and Planetary Science Conference. ; , s. 1630-
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Spectral measurements of Mercury's surface show an absence of absorptions centered near 0.9 and 1.2 micrometers. At the Moon these absorption bands are ubiquitous at varying depths. We have obtained spectra from the Moon for comparison. The lunar results
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| 6. |
- Sprague, A. L., et al.
(författare)
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Mercury: Near Infrared Spectroscopy with SpeX
- 2003
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Ingår i: American Astronomical Society, DPS meeting #35, #23.07. ; , s. 2307-
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We report long slit, spatially resolved, high resolving power spectroscopy of Mercury's surface for longitudes 260 - 320 degrees. Spectra extend from 0.8 - 5.0 micrometers. Spectral features indicative of common silicate materials are found. There are var
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| 7. |
- Warell, J., et al.
(författare)
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Moon: First Spectra from 0.7 to 5.5 µm
- 2004
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Ingår i: 35th Lunar and Planetary Science Conference. ; , s. 1624-
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We present spectra of the Moon in the 0.7 - 5.5 micrometer wavelength region, obtained with SpeX on the IRTF. Spectra of Mercury were also obtained with the same instrument configuration and telescope during the observing period. Mercury spectra are discu
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| 8. |
- Ayeni, Olufemi R., et al.
(författare)
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Osteochondroplasty and Labral Repair for the Treatment of Young Adults With Femoroacetabular Impingement: A Randomized Controlled Trial
- 2021
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Ingår i: AMERICAN JOURNAL OF SPORTS MEDICINE. - : SAGE Publications. - 0363-5465 .- 1552-3365. ; 49:1, s. 25-34
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Tidskriftsartikel (refereegranskat)abstract
- Background: Femoroacetabular impingement (FAI) is a condition known to cause hip pain in young adults. Purpose: To evaluate the efficacy of the surgical correction of FAI via arthroscopic osteochondroplasty with or without labral repair compared with arthroscopic lavage of the hip joint with or without labral repair. Study Design: Randomized controlled trial; Level of evidence, 1. Methods: A total of 220 male and female participants aged 18 to 50 years with nonarthritic FAI suitable for surgical treatment were recruited for the trial at 10 clinical centers in Canada, Finland, and Denmark between October 2012 and November 2017, of whom 214 were included in the final analysis. In the osteochondroplasty group, cam- and/or pincer-type lesions were resected using fluoroscopic guidance. In the lavage group, the joint was washed out with 3 L of normal saline. Surgeons were instructed to repair the labrum in both groups if it was mechanically unstable once probed, showing visible displacement or chondrolabral separation. The primary outcome was patient-reported pain (using the 100-point visual analog scale [VAS]) at 12 months. Secondary outcomes included hip function (Hip Outcome Score [HOS] and International Hip Outcome Tool), physical and mental health (12-Item Short Form Health Survey), and health utility (EuroQol-5 Dimensions) at 12 months as well as any reoperations and other hip-related adverse events at 24 months. Results: At 12 months, there was no difference in pain (VAS) between the groups (mean difference [MD], 0.11 [95% CI, -7.22 to 7.45]; P = .98). Also, 88.3% (189/214) of participants had a labral tear, of which 60.3% were repaired. For the secondary outcomes, there were no significant differences between treatment groups, with the exception of the HOS activities of daily living domain in which lavage showed significant improvement compared with osteochondroplasty (MD, -5.03 [95% CI, -10.40 to -0.03]; P = .049). By 24 months, there were significantly fewer reoperations reported in the osteochondroplasty group (8/105) than the lavage group (19/104) (odds ratio, 0.37 [95% CI, 0.15-0.89]; P = .026). The primary reasons for a reoperation included hip pain (15/27; 55.6%) and a reinjury of the labrum (11/27; 40.7%). Conclusion: Both the osteochondroplasty and the lavage groups with or without labral repair for FAI had significantly improved pain or function significantly at 1 year. By 2 years, the reoperation rate was significantly lower in the osteochondroplasty group.
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| 9. |
- Cremonese, G., et al.
(författare)
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Techniques and methods in ground-based observation of Mercury
- 2010
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Ingår i: Planetary and Space Science. - : Elsevier BV. - 0032-0633 .- 1873-5088. ; 58:1-2, s. 61-78
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Tidskriftsartikel (refereegranskat)abstract
- Modern telescopes and equipments have permitted excellent ground-based observations of Mercury, despite its proximity to the Sun. This is one of the main reasons why it has been observed using different techniques from high-resolution spectroscopy to high-resolution imaging from visible to infrared up to radio wavelengths. Because there is no obscuration from a thick atmosphere, the surface and exosphere have been imaged and the surface studied by infrared spectroscopy. This manuscript describes the techniques used to obtain information and new data of Mercury giving an overview of advantages and difficulties, and describes important scientific discoveries made with specific telescopic instrumentation.
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