Physiological Availability of the Vitamins

Melnick, Daniel; Hochberg, Melvin; Oser, Bernard L.

doi:10.1093/jn/34.4.409

Cited by 10 publications

(13 citation statements)

References 12 publications

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“…Observations of the M33 clusters -both young and old -have been collated in the catalogue by Sarajedini & Mancone (2007;SM hereafter). This catalogue includes cluster identifications and data from ground-based observations (Hiltner 1960;Melnick & D'Odorico 1978;Christian & Schommer 1982, 1988Mochejska et al 1998), HST imaging (Chandar et al 1999(Chandar et al , 2001Bedin et al 2005;Park & Lee 2007;Stonkutė et al 2008;Huxor et al 2009;San Roman et al 2009), and further data on identified clusters from Ma et al (2001Ma et al ( , 2002aMa et al ( ,b,c, 2004a. The SM catalogue contains 595 objects of which 428 are classified as high-confidence clusters (based on HST and high-resolution ground-based imaging).…”

Section: Introductionmentioning

confidence: 99%

THE M33 GLOBULAR CLUSTER SYSTEM WITH PAndAS DATA: THE LAST OUTER HALO CLUSTER?

Cockcroft

Harris

Ferguson

et al. 2011

ApJ

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We use CFHT/MegaCam data to search for outer halo star clusters in M33 as part of the Pan-Andromeda Archaeological Survey (PAndAS). This work extends previous studies out to a projected radius of 50 kpc and covers over 40 square degrees. We find only one new unambiguous star cluster in addition to the five previously known in the M33 outer halo (10 kpc ≤ r ≤ 50 kpc). Although we identify 2440 cluster candidates of various degrees of confidence from our objective image search procedure, almost all of these are likely background contaminants, mostly faint unresolved galaxies. We measure the luminosity, color and structural parameters of the new cluster in addition to the five previouslyknown outer halo clusters. At a projected radius of 22 kpc, the new cluster is slightly smaller, fainter and redder than all but one of the other outer halo clusters, and has g ′ ≈ 19.9, (g ′ − i ′ ) ≈ 0.6, concentration parameter c ≈ 1.0, a core radius r c ≈ 3.5 pc, and a half-light radius r h ≈ 5.5 pc. For M33 to have so few outer halo clusters compared to M31 suggests either tidal stripping of M33's outer halo clusters by M31, or a very different, much calmer accretion history of M33.

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Section: Introductionmentioning

confidence: 99%

THE M33 GLOBULAR CLUSTER SYSTEM WITH PAndAS DATA: THE LAST OUTER HALO CLUSTER?

Cockcroft

Harris

Ferguson

et al. 2011

ApJ

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“…At the same time, Kron & Mayall (1960) identified four M33 star clusters for which they gave P V photometry. Then, Melnick & D'Odorico (1978) detected 58 star cluster candidates in M33 based on a baked IIIa-J+GG385 plate covering a field of about 1 • in diameter, including B photometry of them. The most comprehensive catalog of nonstellar objects in M33 was compiled by Christian & Schommer (1982, 1988, who detected 250 nonstellar objects by visually examining a single photographic plate taken at the Ritchey-Chrestien focus of the 4-m telescope at Kitt Peak National Observatory.…”

Section: Introductionmentioning

confidence: 99%

NEWUBVRIPHOTOMETRY OF 234 M33 STAR CLUSTERS

2013

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This is the second paper of our series. In this paper, we present U BV RI photometry for 234 star clusters in the field of M33. For most of these star clusters, there is photometry in only two bands in previous studies. The photometry of these star clusters is performed using archival images from the Local Group Galaxies Survey, which covers 0.8 deg 2 along the major axis of M33. Detailed comparisons show that, in general, our photometry is consistent with previous measurements, especially, our photometry is in good agreement with Zloczewski & Kaluzny. Combined with the star clusters' photometry in previous studies, we present some results: none of the M33 youngest clusters (∼ 10 7 yr) have masses approaching 10 5 M ⊙ ; comparisons with models of simple stellar populations suggest a large range of ages of M33 star clusters, and some as old as the Galactic globular clusters.

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“…At the same time, Kron & Mayall (1960) did photoelectric observations for 4 M33 star clusters. And then, Melnick & D'Odorico (1978) detected 58 star clusters in M33 based on a baked IIIa-J+GG385 plate which covering a field of about one degree in diameter. The most comprehensive catalog of nonstellar objects in M33 was compiled by Christian & Schommer (1982, 1988, who detected 250 nonstellar objects by visually examining a single photographic plate taken at the Ritchey-Chrestien focus of the 4 m telescope at Kitt Peak National Observatory, and obtained ground-based B, V , and I photometry of 106 of these objects, for which they believe to be star clusters.…”

Section: Introductionmentioning

confidence: 99%

“…Since the pioneering work of Chandar et al (1999a), the era of detecting and studying M33 star clusters based on the images with Hubble Space Telescope (HST) has begun (Chandar et al 1999a(Chandar et al ,b,c, 2001(Chandar et al , 2002Bedin et al 2005;Park & Lee 2007;Stonkutė et al 2008;Huxor et al 2009;San Roman et al 2009;Zloczewski & Kaluzny 2009). Ma et al (2001Ma et al ( , 2002aMa et al ( ,b,c, 2004a constructed spectral energy distributions (SEDs) in 13 intermediate filters of the Beijing-Arizona-Taiwan-Connecticut (BATC) photometric system for known M33 clusters and candidates from Melnick & D'Odorico (1978), Chandar et al (1999aChandar et al ( , 2001 and Mochejska et al (1998), and estimated cluster properties. In order to construct a single master catalog incorporating the entries in all of the individual catalogs including all known properties of each cluster, Sarajedini & Mancone (2007) merged all of the above-mentioned catalogs before 2007, for a summary of the properties of all of these cata-logs.…”

Section: Introductionmentioning

confidence: 99%

AN UPDATED CATALOG OF M33 CLUSTERS AND CANDIDATES:UBVRIPHOTOMETRY AND SOME STATISTICAL RESULTS

2012

The Astronomical Journal

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We present U BV RI photometry for 392 star clusters and candidates in the field of M33, which are selected from the most recent star cluster catalog. In this catalog, the authors listed star clusters' parameters such as cluster positions, magnitudes and colors in the U BV RIJHK s filters, and so on. However, a large fraction of objects in this catalog do not have previously published photometry. Photometry is performed using archival images from the Local Group Galaxies Survey, which covers 0.8 deg 2 along the major axis of M33. Detailed comparisons show that, in general, our photometry is consistent with previous measurements. Positions (right ascension and declination) for some clusters are corrected here. Combined with previous literature, we constitute a large sample of M33 star clusters. Based on this cluster sample, we present some statistical results: none of the M33 youngest clusters (∼ 10 7 yr) have masses approaching 10 5 M ⊙ ; roughly half the star clusters are consistent with the 10 4 to 10 5 M ⊙ mass models; the continuous distribution of star clusters along the model line indicates that M33 star clusters have been formed continuously from the epoch of the first star cluster formation until recent times; there are ∼ 50 star clusters which being overlapped with the Galactic globular clusters on the color-color diagram, and these clusters are old globular clusters candidates in M33.

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Physiological Availability of the Vitamins

Cited by 10 publications

References 12 publications

THE M33 GLOBULAR CLUSTER SYSTEM WITH PAndAS DATA: THE LAST OUTER HALO CLUSTER?

THE M33 GLOBULAR CLUSTER SYSTEM WITH PAndAS DATA: THE LAST OUTER HALO CLUSTER?

NEWUBVRIPHOTOMETRY OF 234 M33 STAR CLUSTERS

AN UPDATED CATALOG OF M33 CLUSTERS AND CANDIDATES:UBVRIPHOTOMETRY AND SOME STATISTICAL RESULTS

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