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Status: Bibliographieeintrag

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Verfasst von:Bidaran, Bahar [VerfasserIn]   i
 Pasquali, Anna [VerfasserIn]   i
 Lisker, Thorsten [VerfasserIn]   i
 Coccato, Lodovico [VerfasserIn]   i
 Falcón-Barroso, Jesus [VerfasserIn]   i
 van de Ven, Glenn [VerfasserIn]   i
 Peletier, Reynier [VerfasserIn]   i
 Emsellem, Eric [VerfasserIn]   i
 Grebel, Eva K. [VerfasserIn]   i
 La Barbera, Francesco [VerfasserIn]   i
 Janz, Joachim [VerfasserIn]   i
 Sybilska, Agnieszka [VerfasserIn]   i
 Vijayaraghavan, Rukmani [VerfasserIn]   i
 Gallagher, John S. [VerfasserIn]   i
 Gadotti, Dimitri A. [VerfasserIn]   i
Titel:On the accretion of a new group of galaxies on to Virgo
Titelzusatz:I. Internal kinematics of nine in-falling dEs
Verf.angabe:Bahar Bidaran, Anna Pasquali, Thorsten Lisker, Lodovico Coccato, Jesus Falcon-Barroso, Glenn van de Ven, Reynier Peletier, Eric Emsellem, Eva K. Grebel, Francesco La Barbera, Joachim Janz, Agnieszka Sybilska, Rukmani Vijayaraghavan, John Gallagher III, and Dimitri A. Gadotti
E-Jahr:2020
Jahr:20 July 2020
Umfang:11 S.
Fussnoten:Gesehen am 14.12.2020
Titel Quelle:Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society
Ort Quelle:Oxford : Oxford Univ. Press, 1827
Jahr Quelle:2020
Band/Heft Quelle:497(2020), 2, Seite 1904-1924
ISSN Quelle:1365-2966
Abstract:Galaxy environment has been shown to play an important role in transforming late-type, star-forming galaxies to quiescent spheroids. This transformation is expected to be more severe for low-mass galaxies (M < 10(10) M-circle dot) in dense galaxy groups and clusters, mostly due to the influence of their past host haloes (also known as pre-processing) and their present-day environments. For the first time, in this study, we investigate a sample of nine early-type dwarf galaxies (dEs) that were accreted as a likely bound group on to the Virgo galaxy cluster about 2-3 Gyr ago. Considering this special condition, these nine dEs may provide a test bed for distinguishing between the influence of the Virgo galaxy cluster and the effects of the previous host halo on their current properties. Specifically, we use vr-umusF integral-field unit spectra to derive their kinematics and specific angular momentum (lambda(R)) profiles. Wc observe a spread in the lambda(R) profiles of our sample dEs, finding that the lambda(R) profiles of half of them are as high as those of low-mass field galaxies. The remaining dEs exhibit lambda(R) profiles as low as those of Virgo dEs that were likely accreted longer ago. Moreover, we detect nebular emission in one dE with a gas velocity offset suggesting ongoing gas stripping in Virgo. We suggest that the low-lambda(R) dEs in our sample were processed by their previous host halo, prior to their infall to Virgo, and that the high-lambda(R) dEs may be experiencing ram pressure stripping in Virgo.
DOI:doi:10.1093/mnras/staa2097
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.1093/mnras/staa2097
 DOI: https://doi.org/10.1093/mnras/staa2097
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:galaxies: dwarf
 galaxies: evolution
 angular-momentum
 atlas(3d) project
 digital sky survey
 dwarf elliptic galaxies
 galaxies: kinematics and dynamics
 galaxies: interactions
 galaxies: structure
 line kinematics
 luminosity functions
 multi-gaussian expansion
 sauron project
 star-formation
 stellar populations
K10plus-PPN:1742808816
Verknüpfungen:→ Zeitschrift

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