Discovery of CO absorption at z = 0.05 in G0248+430 - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2019

Discovery of CO absorption at z = 0.05 in G0248+430

Résumé

Absorption lines in front of distant quasars are quite rare in the millimeter domain. They can however bring a very useful and complementary information to emission lines. We report here the detection with NOEMA of CO(1-0) and CN(1-0) lines in absorption, and confirmation of CO emission in the quasar/galaxy pair Q0248+430/G0248+430. The system G0248+430 corresponds to two merging galaxies (a Seyfert and a LINER) at z=0.0519 with a tidal tail just on the line of sight to the background quasar Q0248+430 at z = 1.313. Optical (CaII, NaI), HI-21cm and OH-1667 MHz absorption lines associated with the tidal tail of the foreground system have previously been detected toward the quasar, while four CO lines at different rotation J levels have been detected in emission from the foreground galaxies. New HI 21-cm line observations with the upgraded GMRT array are presented. We discuss the molecular content of the merging galaxies, and the physical conditions in the absorbing interstellar medium of the tidal tail.
Fichier principal
Vignette du fichier
1901.04683.pdf (858.42 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02083618 , version 1 (29-03-2019)

Identifiants

Citer

F. Combes, N. Gupta, G. I G Jozsa, E. Momjian. Discovery of CO absorption at z = 0.05 in G0248+430. Astronomy and Astrophysics - A&A, 2019, 623, pp.A133. ⟨10.1051/0004-6361/201935057⟩. ⟨hal-02083618⟩
41 Consultations
87 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More