SIMBAD references

2025A&A...697A...7M - Astronomy and Astrophysics, volume 697A7 (2025/5-1)

Euclid: Early Release Observations - A glance at free-floating newborn planets in the σ Orionis cluster.

MARTIN E.L., ZERJAL M., BOUY H., MARTIN-GONZALEZ D., MUNOZ TORRES S., BARRADO D., OLIVARES J., PEREZ-GARRIDO A., MAS-BUITRAGO P., CRUZ P., SOLANO E., ZAPATERO OSORIO M.R., LODIEU N., BEJAR V.J.S., ZHANG J.-Y., DEL BURGO C., HUELAMO N., LAUREIJS R., MORA A., SAIFOLLAHI T., CUILLANDRE J.-C., SCHIRMER M., TATA R., POINTS S., PHAN-BAO N., GOLDMAN B., CASEWELL S.L., REYLE C., SMART R.L., DOMINGUEZ-TAGLE C., ESCOBAR A., SEDIGHI N., TSILIA S., VITAS N., AYADI A., AGHANIM N., ALTIERI B., ANDREON S., AURICCHIO N., BALDI M., BALESTRA A., BARDELLI S., BASSET A., BENDER R., BONINO D., BRANCHINI E., BRESCIA M., BRINCHMANN J., CAMERA S., CAPOBIANCO V., CARBONE C., CARRETERO J., CASAS S., CASTELLANO M., CAVUOTI S., CIMATTI A., CONGEDO G., CONSELICE C.J., CONVERSI L., COPIN Y., CORCIONE L., COURBIN F., COURTOIS H.M., CROPPER M., DA SILVA A., DEGAUDENZI H., DI GIORGIO A.M., DINIS J., DUBATH F., DUPAC X., DUSINI S., EALET A., FARINA M., FARRENS S., FERRIOL S., FOSALBA P., FRAILIS M., FRANCESCHI E., FUMANA M., GALEOTTA S., GARILLI B., GILLARD W., GILLIS B., GIOCOLI C., GOMEZ-ALVAREZ P., GRAZIAN A., GRUPP F., GUZZO L., HAUGAN S.V.H., HOAR J., HOEKSTRA H., HOLMES W., HOOK I., HORMUTH F., HORNSTRUP A., HU D., HUDELOT P., JAHNKE K., JHABVALA M., KEIHANEN E., KERMICHE S., KIESSLING A., KILBINGER M., KITCHING T., KOHLEY R., KUBIK B., KUMMEL M., KUNZ M., KURKI-SUONIO H., LE MIGNANT D., LIGORI S., LILJE P.B., LINDHOLM V., LLORO I., MAINO D., MAIORANO E., MANSUTTI O., MARGGRAF O., MARTINET N., MARULLI F., MASSEY R., MEDINACELI E., MEI S., MELCHIOR M., MELLIER Y., MENEGHETTI M., MEYLAN G., MOHR J.J., MORESCO M., MOSCARDINI L., NIEMI S.-M., PADILLA C., PALTANI S., PASIAN F., PEDERSEN K., PERCIVAL W.J., PETTORINO V., PIRES S., POLENTA G., PONCET M., POPA L.A., POZZETTI L., RACCA G.D., RAISON F., REBOLO R., RENZI A., RHODES J., RICCIO G., RIX H.-W., ROMELLI E., RONCARELLI M., ROSSETTI E., SAGLIA R., SAPONE D., SARTORIS B., SAUVAGE M., SCARAMELLA R., SCHNEIDER P., SECROUN A., SEIDEL G., SEIFFERT M., SERRANO S., SIRIGNANO C., SIRRI G., STANCO L., TALLADA-CRESPI P., TAYLOR A.N., TEPLITZ H.I., TERENO I., TOLEDO-MOREO R., TSYGANOV A., TUTUSAUS I., VALENZIANO L., VASSALLO T., VERDOES KLEIJN G., WANG Y., WELLER J., WILLIAMS O.R., ZUCCA E., BACCIGALUPI C., WILLIS G., SIMON P., MARTIN-FLEITAS J. and SCOTT D.

Abstract (from CDS):

We provide an early assessment of the imaging capabilities of the Euclid space mission to deeply probe nearby star-forming regions and associated very young open clusters, and in particular, to determine to which extent it can shed light into the newborn free- floating planet population. This paper focusses on a low-reddening region observed in just one Euclid pointing. The dust and gas has been cleared out from the region by the hot σ Orionis star. One late-M and six known spectroscopically confirmed L-type ultracool members in the σ Orionis cluster were used as benchmarks to provide a high-purity procedure to select new candidate members with Euclid. The exquisite angular resolution and depth delivered by the Euclid instruments allowed us to focus on bona fide point sources. A cleaned sample of σ Orionis cluster substellar members was produced, and the initial mass function (IMF) was estimated by combining Euclid and Gaia data. Our σ Orionis substellar IMF is consistent with a power-law distribution without a significant steepening at the planetary-mass end. No evidence of a low-mass cutoff is found down to the detection limit of this study at 4 Jupiter masses in the very young σ Orionis open cluster.

Abstract Copyright: © The Authors 2025

Journal keyword(s): catalogs - surveys - astrometry

Nomenclature: Table A.5: [MZB2025] JDDD.dddddd+DD.dddddd N=18. Figs 4-5, Table A.6: [MZB2025] sig Ori A (Nos A-G).

Simbad objects: 43

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