2016AJ....152..225H

Query : 2016AJ....152..225H

2016AJ....152..225H - Astron. J., 152, 225-225 (2016/December-0)

HIghMass-High H I mass, H I-rich galaxies at z ∼ 0: combined H I and H2 observations.

HALLENBECK G., HUANG S., SPEKKENS K., HAYNES M.P., GIOVANELLI R., ADAMS E.A.K., BRINCHMANN J., CARPENTER J., CHENGALUR J., HUNT L.K., MASTERS K.L. and SAINTONGE A.

Abstract (from CDS):

We present resolved H I and CO observations of three galaxies from the HIghMass sample, a sample of H I-massive (MHI>1010 M☉), gas-rich (MHI in the top 5% for their M*) galaxies identified in the ALFALFA survey. Despite their high gas fractions, these are not low-surface-brightness galaxies and have typical specific star formation rates (SFR/M*) for their stellar masses. The three galaxies have normal SFRs for their H2 masses, but unusually short star formation efficiency scale lengths, indicating that the star formation bottleneck in these galaxies is in the conversion of H I to H2, not in converting H2 to stars. In addition, their dark matter spin parameters (λ) are above average, but not exceptionally high, suggesting that their star formation has been suppressed over cosmic time but is now becoming active, in agreement with prior Hα observations.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: evolution - galaxies: individual: (UGC 6168, UGC 7899, NGC 5230) - galaxies: spiral - radio lines: galaxies - radio lines: galaxies

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1741 2
2 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1887 1
3 Z 38-130 G 11 07 04.3042701792 +07 48 14.403475692   15.1       ~ 26 0
4 Malin 1 LSB 12 36 59.3463193464 +14 19 49.164305988   17.80       ~ 224 0
5 IC 3704 GiG 12 43 45.5775354720 +10 46 11.792347212   14.7       ~ 68 0
6 NGC 5221 IG 13 34 55.909 +13 49 57.14   14.5       ~ 75 0
7 NGC 5222a LIN 13 34 55.9448054640 +13 44 31.798096800   14.1       ~ 60 1
8 NGC 5230 GiG 13 35 31.8688678992 +13 40 34.240271556   13.4       ~ 86 0
9 Z 46-60 AG? 14 08 29.106 +07 03 28.80   14.5       ~ 80 0
10 Z 454-39 G 23 19 30.4940411496 +16 04 29.240723064   15.6       ~ 77 0

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