J/MNRAS/475/788     GAMA blue spheroids within 87 Mpc        (Mahajan+, 2018)
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Galaxy And Mass Assembly (GAMA): blue spheroids within 87 Mpc.
    Mahajan S., Drinkwater M.J., Driver S., Hopkins A.M., Graham A.W.,
    Brough S., Brown M.J.I., Holwerda B.W., Owers M.S., Pimbblet K.A.
   <Mon. Not. R. Astron. Soc., 475, 788-799 (2018)>
   =2018MNRAS.475..788M    (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxies ; Morphology ; H I data
Keywords: galaxies: evolution - galaxies: fundamental parameters -
          galaxies: star formation - galaxies: stellar content -
          galaxies: structure

Abstract:
    In this paper, we test if nearby blue spheroid (BSph) galaxies may
    become the progenitors of star-forming spiral galaxies or passively
    evolving elliptical galaxies. Our sample comprises 428 galaxies of
    various morphologies in the redshift range 0.002<z<0.02 (8-87Mpc)
    with panchromatic data from the Galaxy and Mass Assembly survey. We
    find that BSph galaxies are structurally (mean effective surface
    brightness, effective radius) very similar to their passively evolving
    red counterparts. However, their star formation and other properties
    such as colour, age, and metallicity are more like star-forming
    spirals than spheroids (ellipticals and lenticulars). We show that
    BSph galaxies are statistically distinguishable from other spheroids
    as well as spirals in the multidimensional space mapped by
    luminosity-weighted age, metallicity, dust mass, and specific star
    formation rate. We use HI data to reveal that some of the BSphs are
    (further) developing their discs, hence their blue colours. They may
    eventually become spiral galaxies - if sufficient gas accretion occurs
    - or more likely fade into low-mass red galaxies.

Description:
    The sample used in this paper is the same as that used in Mahajan et
    al. (2015MNRAS.446.2967M, hereafter Paper I), but with some of the
    derived parameters updated in accordance with the latest versions of
    the GAMA II catalogues (Liske et al. 2015MNRAS.452.2087L, Cat.
    J/MNRAS/452/2087).

    We present our complete sample of 428 galaxies (also used in Paper I,
    Mahajan et al. (2015MNRAS.446.2967M) spanning the redshift range
    0.002<z<0.02, and devoid of very high density environments.

File Summary:
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 FileName      Lrecl  Records   Explanations
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ReadMe            80        .   This file
table1.dat        56      428   Complete sample of 428 galaxies
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See also:
   J/MNRAS/452/2087 : Galaxy And Mass Assembly (GAMA): DR2 (Liske+, 2015)

Byte-by-byte Description of file: table1.dat
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   Bytes Format Units     Label     Explanations
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   1-  7  I7    ---       GAMA      GAMA ID
   9- 13  F5.2  mag       rmag      r magnitude
  16- 19  F4.2  mag     e_rmag      rms uncertainty on rmag
  21- 22  I2    ---       Morph     Morphology (1)
  24- 28  F5.3  ---       z         Redshift
  31- 36  I6    ---       ALFALFA   ?=- ALFALFA ID
  39- 43  F5.2  Jy.km/s   SHI       ?=- HI Flux
  47- 50  F4.2  Jy.km/s e_SHI       ?=- rms uncertainty on Si
  52- 56  F5.2  [Msun]    logMHI    ?=- HI mass
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Note (1): Morphology classification as follows:
           1 = Elliptical
           2 = Spiral
           3 = Irregular
           5 = BSph
           6 = LSB
          11 = Lenticular
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History:
    From electronic version of the journal

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(End)                                      Patricia Vannier [CDS]    01-Apr-2021