2010A&A...518L..72P

Query : 2010A&A...518L..72P

2010A&A...518L..72P - Astronomy and Astrophysics, volume 518, L72-72 (2010/7-2)

Radial distribution of gas and dust in spiral galaxies. The case of M 99 (NGC 4254) and M 100 (NGC 4321).

POHLEN M., CORTESE L., SMITH M.W.L., EALES S.A., BOSELLI A., BENDO G.J., GOMEZ H.L., PAPAGEORGIOU A., AULD R., BAES M., BOCK J.J., BRADFORD M., BUAT V., CASTRO-RODRIGUEZ N., CHANIAL P., CHARLOT S., CIESLA L., CLEMENTS D.L., COORAY A., CORMIER D., DWEK E., EALES S.A., ELBAZ D., GALAMETZ M., GALLIANO F., GEAR W.K., GLENN J., GRIFFIN M., HONY S., ISAAK K.G., LEVENSON L.R., LU N., MADDEN S., O'HALLORAN B., OKUMURA K., OLIVER S., PAGE M.J., PANUZZO P., PARKIN T.J., PEREZ-FOURNON I., RANGWALA N., RIGBY E.E., ROUSSEL H., RYKALA A., SACCHI N., SAUVAGE M., SCHULZ B., SCHIRM M.R.P., SMITH M.W.L., SPINOGLIO L., STEVENS J.A., SRINIVASAN S., SYMEONIDIS M., TRICHAS M., VACCARI M., VIGROUX L., WILSON C.D., WOZNIAK H., WRIGHT G.S. and ZEILINGER W.W.

Abstract (from CDS):

By combining Herschel-SPIRE data with archival Spitzer, HI, and CO maps, we investigate the spatial distribution of gas and dust in the two famous grand-design spirals M99 and M100 in the Virgo cluster. Thanks to the unique resolution and sensitivity of the Herschel-SPIRE photometer, we are for the first time able to measure the distribution and extent of cool, submillimetre (submm)-emitting dust inside and beyond the optical radius. We compare this with the radial variation in both the gas mass and the metallicity. Although we adopt a model-independent, phenomenological approach, our analysis provides important insights. We find the dust extending to at least the optical radius of the galaxy and showing breaks in its radial profiles at similar positions as the stellar distribution. The colour indices f350/f500 and f250/f350 decrease radially consistent with the temperature decreasing with radius. We also find evidence of an increasing gas to dust ratio with radius in the outer regions of both galaxies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: structure - galaxies: individual: M99 - galaxies: individual: M100 - infrared: galaxies - ISM: dust, extinction - submillimetre: galaxies

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4450 3
2 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 919 2
3 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1847 2
4 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6645 0

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