2002A&A...389..367T


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.09CEST17:25:39

2002A&A...389..367T - Astronomy and Astrophysics, volume 389, 367-373 (2002/7-2)

Dynamical condition of neutral hydrogen envelopes of dwarf galaxies and their possible morphological evolution.

TAJIRI Y.Y. and KAMAYA H.

Abstract (from CDS):

We investigate the star-formation history of gas-rich dwarf galaxies, taking account of the dynamical evolution of their neutral hydrogen (HI) envelope. Gas-rich dwarfs are classified into blue compact dwarfs (BCDs) and dwarf irregulars (dIrrs). In this paper, their HI envelope is clearly shown not to be blown away by their stellar feedback. This is concluded since the observed star-formation rate (SFR) of gas-rich dwarfs is generally smaller than a critical SFR, ψcrit, at which stellar feedback accelerates the HI envelope to the escape velocity. From this standpoint and the chemical property of sample BCDs, we suggest two possibilities; (1) the HI gas in the envelope of BCDs is consumed to fuel their star-formation; and (2) BCDs have a similar star-formation history. We also discuss morphological evolution among dwarf galaxies. As long as gas-rich dwarfs are isolated, it is difficult for them to evolve into dwarf ellipticals (dEs). When the HI envelope in gas-rich dwarfs is consumed in subsequent star-formation, a morphological exchange between BCDs and dIrrs is still expected, consistent with previous studies. If the SFR of gas-rich dwarfs was much higher than ψcrit in the past, interestingly, an evolutionary scenario from dEs to gas-rich dwarfs is possible.

Abstract Copyright:

Journal keyword(s): ISM: evolution - ISM: structure - stars: formation - galaxies: dwarf

Simbad objects: 24

goto Full paper

goto View the reference in ADS

Number of rows : 24

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Mrk 600 G 02 51 04.57 +04 27 13.9 14.76 15.07 14.70 14.50 14.29 ~ 117 0
2 UGCA 116 H2G 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 501 0
3 Mrk 5 H2G 06 42 15.9 +75 37 40   17.0       ~ 108 0
4 NGC 2363A HII 07 28 42.8 +69 11 21           ~ 541 3
5 NGC 2366 H2G 07 28 51.85 +69 12 31.1 12.25 11.86 11.39 11.33   ~ 703 0
6 UGC 4483 GiG 08 37 03.29 +69 46 29.2 15.70 15.46 14.98 14.89   ~ 265 0
7 Mrk 116 PaG 09 34 02.1 +55 14 25           ~ 997 1
8 Mrk 22 Sy1 09 49 30.3096198376 +55 34 46.971972356   15.7       ~ 66 0
9 Mrk 33 IG 10 32 31.956 +54 24 03.53 13.29 13.66 13.13 12.71 12.27 ~ 322 1
10 NGC 3353 AGN 10 45 22.390 +55 57 37.36 12.90 13.25 12.79     ~ 319 1
11 Mrk 36 SBG 11 04 58.298 +29 08 16.54   15.50 15.29     ~ 215 0
12 UGC 6456 bCG 11 28 00.43 +78 59 38.4   14.50       ~ 305 1
13 UGC 6578 EmG 11 36 36.636 +00 49 02.61   15.3   14.518 15.1 ~ 115 0
14 Mrk 750 H2G 11 50 02.739 +15 01 23.71   15.4       ~ 67 0
15 LEDA 37102 Sy1 11 51 33.3534243441 -02 22 21.893770899   17       ~ 143 0
16 Mrk 1307 Sy1 11 52 37.19 -02 28 09.9   14.79   14.09 14.9 ~ 157 0
17 IC 745 AGN 11 54 12.250 +00 08 11.68   14.59 14.19     ~ 115 1
18 Mrk 209 bCG 12 26 16.02 +48 29 36.6   15.3       ~ 301 0
19 Mrk 59 AGN 12 59 00.288 +34 50 42.45           ~ 309 2
20 NGC 4861 H2G 12 59 02.340 +34 51 33.98   12.90 12.32     ~ 355 2
21 Mrk 67 EmG 13 41 56.4813088486 +30 31 09.649163533   16.5       ~ 88 0
22 NGC 7077 G 21 29 59.634 +02 24 51.75 14.05 14.25 13.67 13.23 12.86 ~ 95 0
23 Mrk 324 G 23 26 32.783 +18 16 00.07   15.5       ~ 63 0
24 NAME Barbon's Galaxy bCG 23 37 39.543 +30 07 45.93   15.50       ~ 58 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2002A&A...389..367T and select 'bookmark this link' or equivalent in the popup menu


2020.07.09-17:25:39

© Université de Strasbourg/CNRS

    • Contact