2010A&A...518L..42V


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.03CET01:11:22

2010A&A...518L..42V - Astronomy and Astrophysics, volume 518, L42-42 (2010/7-2)

Black hole accretion and star formation as drivers of gas excitation and chemistry in Markarian 231.

VAN DER WERF P., ISAAK K.G., MEIJERINK R., SPAANS M., RYKALA A., FULTON T., LOENEN A.F., WALTER F., WEISS A., ARMUS L., FISCHER J., ISRAEL F.P., HARRIS A.I., VEILLEUX S., HENKEL C., SAVINI G., LORD S., SMITH H.A., GONZALEZ-ALFONSO E., NAYLOR D., AALTO S., CHARMANDARIS V., DASYRA K.M., EVANS A., GAO Y., GREVE T.R., GUESTEN R., KRAMER C., MARTIN-PINTADO J., MAZZARELLA J., PAPADOPOULOS P.P., SANDERS D.B., SPINOGLIO L., STACEY G., VLAHAKIS C., WIEDNER M.C. and XILOURIS E.M.

Abstract (from CDS):

We present a full high resolution SPIRE FTS spectrum of the nearby ultraluminous infrared galaxy Mrk231. In total 25 lines are detected, including CO J=5-4 through J=13-12, 7 rotational lines of H2O, 3 of OH+ and one line each of H2O+, CH+, and HF. We find that the excitation of the CO rotational levels up to J=8 can be accounted for by UV radiation from star formation. However, the approximately flat luminosity distribution of the CO lines over the rotational ladder above J=8 requires the presence of a separate source of excitation for the highest CO lines. We explore X-ray heating by the accreting supermassive black hole in Mrk231 as a source of excitation for these lines, and find that it can reproduce the observed luminosities. We also consider a model with dense gas in a strong UV radiation field to produce the highest CO lines, but find that this model strongly overpredicts the hot dust mass in Mrk231. Our favoured model consists of a star forming disk of radius 560pc, containing clumps of dense gas exposed to strong UV radiation, dominating the emission of CO lines up to J=8. X-rays from the accreting supermassive black hole in Mrk231 dominate the excitation and chemistry of the inner disk out to a radius of 160 pc, consistent with the X-ray power of the AGN in Mrk231. The extraordinary luminosity of the OH+ and H2O+ lines reveals the signature of X-ray driven excitation and chemistry in this region.

Abstract Copyright:

Journal keyword(s): galaxies: individual: Mrk231 - galaxies: active - galaxies: ISM - galaxies: nuclei - galaxies: starburst - infrared: galaxies

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Orion Bright Bar reg 05 35 22.30 -05 24 33.0           ~ 743 0
2 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1817 3

    Equat.    Gal    SGal    Ecl

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2021.03.03-01:11:22

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